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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/11/01 14:54:03 UTC
[12/25] hbase-site git commit: Published site at
6bdaedd7ce806d3ec3d5a9a4540b544594898374.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/0f0847e0/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.StatisticsThread.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.StatisticsThread.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.StatisticsThread.html
index 21f7b0f..6a5ac20 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.StatisticsThread.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.StatisticsThread.html
@@ -143,511 +143,512 @@
<span class="sourceLineNo">135</span> return instance;<a name="line.135"></a>
<span class="sourceLineNo">136</span> }<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
-<span class="sourceLineNo">138</span> static ChunkCreator getInstance() {<a name="line.138"></a>
-<span class="sourceLineNo">139</span> return instance;<a name="line.139"></a>
-<span class="sourceLineNo">140</span> }<a name="line.140"></a>
-<span class="sourceLineNo">141</span><a name="line.141"></a>
-<span class="sourceLineNo">142</span> /**<a name="line.142"></a>
-<span class="sourceLineNo">143</span> * Creates and inits a chunk. The default implementation for a specific chunk size.<a name="line.143"></a>
-<span class="sourceLineNo">144</span> * @return the chunk that was initialized<a name="line.144"></a>
-<span class="sourceLineNo">145</span> */<a name="line.145"></a>
-<span class="sourceLineNo">146</span> Chunk getChunk(ChunkType chunkType) {<a name="line.146"></a>
-<span class="sourceLineNo">147</span> return getChunk(CompactingMemStore.IndexType.ARRAY_MAP, chunkType);<a name="line.147"></a>
-<span class="sourceLineNo">148</span> }<a name="line.148"></a>
-<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span> /**<a name="line.150"></a>
-<span class="sourceLineNo">151</span> * Creates and inits a chunk. The default implementation.<a name="line.151"></a>
-<span class="sourceLineNo">152</span> * @return the chunk that was initialized<a name="line.152"></a>
-<span class="sourceLineNo">153</span> */<a name="line.153"></a>
-<span class="sourceLineNo">154</span> Chunk getChunk() {<a name="line.154"></a>
-<span class="sourceLineNo">155</span> return getChunk(CompactingMemStore.IndexType.ARRAY_MAP, ChunkType.DATA_CHUNK);<a name="line.155"></a>
-<span class="sourceLineNo">156</span> }<a name="line.156"></a>
-<span class="sourceLineNo">157</span><a name="line.157"></a>
-<span class="sourceLineNo">158</span> /**<a name="line.158"></a>
-<span class="sourceLineNo">159</span> * Creates and inits a chunk. The default implementation for a specific index type.<a name="line.159"></a>
-<span class="sourceLineNo">160</span> * @return the chunk that was initialized<a name="line.160"></a>
-<span class="sourceLineNo">161</span> */<a name="line.161"></a>
-<span class="sourceLineNo">162</span> Chunk getChunk(CompactingMemStore.IndexType chunkIndexType) {<a name="line.162"></a>
-<span class="sourceLineNo">163</span> return getChunk(chunkIndexType, ChunkType.DATA_CHUNK);<a name="line.163"></a>
-<span class="sourceLineNo">164</span> }<a name="line.164"></a>
-<span class="sourceLineNo">165</span><a name="line.165"></a>
-<span class="sourceLineNo">166</span> /**<a name="line.166"></a>
-<span class="sourceLineNo">167</span> * Creates and inits a chunk with specific index type and type.<a name="line.167"></a>
-<span class="sourceLineNo">168</span> * @return the chunk that was initialized<a name="line.168"></a>
-<span class="sourceLineNo">169</span> */<a name="line.169"></a>
-<span class="sourceLineNo">170</span> Chunk getChunk(CompactingMemStore.IndexType chunkIndexType, ChunkType chunkType) {<a name="line.170"></a>
-<span class="sourceLineNo">171</span> switch (chunkType) {<a name="line.171"></a>
-<span class="sourceLineNo">172</span> case INDEX_CHUNK:<a name="line.172"></a>
-<span class="sourceLineNo">173</span> if (indexChunksPool != null) {<a name="line.173"></a>
-<span class="sourceLineNo">174</span> return getChunk(chunkIndexType, indexChunksPool.getChunkSize());<a name="line.174"></a>
-<span class="sourceLineNo">175</span> }<a name="line.175"></a>
-<span class="sourceLineNo">176</span> case DATA_CHUNK:<a name="line.176"></a>
-<span class="sourceLineNo">177</span> if (dataChunksPool == null) {<a name="line.177"></a>
-<span class="sourceLineNo">178</span> return getChunk(chunkIndexType, chunkSize);<a name="line.178"></a>
-<span class="sourceLineNo">179</span> } else {<a name="line.179"></a>
-<span class="sourceLineNo">180</span> return getChunk(chunkIndexType, dataChunksPool.getChunkSize());<a name="line.180"></a>
-<span class="sourceLineNo">181</span> }<a name="line.181"></a>
-<span class="sourceLineNo">182</span> default:<a name="line.182"></a>
-<span class="sourceLineNo">183</span> throw new IllegalArgumentException(<a name="line.183"></a>
-<span class="sourceLineNo">184</span> "chunkType must either be INDEX_CHUNK or DATA_CHUNK");<a name="line.184"></a>
-<span class="sourceLineNo">185</span> }<a name="line.185"></a>
-<span class="sourceLineNo">186</span> }<a name="line.186"></a>
-<span class="sourceLineNo">187</span><a name="line.187"></a>
-<span class="sourceLineNo">188</span> /**<a name="line.188"></a>
-<span class="sourceLineNo">189</span> * Creates and inits a chunk.<a name="line.189"></a>
-<span class="sourceLineNo">190</span> * @return the chunk that was initialized<a name="line.190"></a>
-<span class="sourceLineNo">191</span> * @param chunkIndexType whether the requested chunk is going to be used with CellChunkMap index<a name="line.191"></a>
-<span class="sourceLineNo">192</span> * @param size the size of the chunk to be allocated, in bytes<a name="line.192"></a>
-<span class="sourceLineNo">193</span> */<a name="line.193"></a>
-<span class="sourceLineNo">194</span> Chunk getChunk(CompactingMemStore.IndexType chunkIndexType, int size) {<a name="line.194"></a>
-<span class="sourceLineNo">195</span> Chunk chunk = null;<a name="line.195"></a>
-<span class="sourceLineNo">196</span> MemStoreChunkPool pool = null;<a name="line.196"></a>
-<span class="sourceLineNo">197</span><a name="line.197"></a>
-<span class="sourceLineNo">198</span> // if the size is suitable for one of the pools<a name="line.198"></a>
-<span class="sourceLineNo">199</span> if (dataChunksPool != null && size == dataChunksPool.getChunkSize()) {<a name="line.199"></a>
-<span class="sourceLineNo">200</span> pool = dataChunksPool;<a name="line.200"></a>
-<span class="sourceLineNo">201</span> } else if (indexChunksPool != null && size == indexChunksPool.getChunkSize()) {<a name="line.201"></a>
-<span class="sourceLineNo">202</span> pool = indexChunksPool;<a name="line.202"></a>
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-<span class="sourceLineNo">204</span><a name="line.204"></a>
-<span class="sourceLineNo">205</span> // if we have a pool<a name="line.205"></a>
-<span class="sourceLineNo">206</span> if (pool != null) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span> // the pool creates the chunk internally. The chunk#init() call happens here<a name="line.207"></a>
-<span class="sourceLineNo">208</span> chunk = pool.getChunk();<a name="line.208"></a>
-<span class="sourceLineNo">209</span> // the pool has run out of maxCount<a name="line.209"></a>
-<span class="sourceLineNo">210</span> if (chunk == null) {<a name="line.210"></a>
-<span class="sourceLineNo">211</span> if (LOG.isTraceEnabled()) {<a name="line.211"></a>
-<span class="sourceLineNo">212</span> LOG.trace("The chunk pool is full. Reached maxCount= " + pool.getMaxCount()<a name="line.212"></a>
-<span class="sourceLineNo">213</span> + ". Creating chunk onheap.");<a name="line.213"></a>
-<span class="sourceLineNo">214</span> }<a name="line.214"></a>
-<span class="sourceLineNo">215</span> }<a name="line.215"></a>
-<span class="sourceLineNo">216</span> }<a name="line.216"></a>
-<span class="sourceLineNo">217</span><a name="line.217"></a>
-<span class="sourceLineNo">218</span> if (chunk == null) {<a name="line.218"></a>
-<span class="sourceLineNo">219</span> // the second parameter explains whether CellChunkMap index is requested,<a name="line.219"></a>
-<span class="sourceLineNo">220</span> // in that case, put allocated on demand chunk mapping into chunkIdMap<a name="line.220"></a>
-<span class="sourceLineNo">221</span> chunk = createChunk(false, chunkIndexType, size);<a name="line.221"></a>
-<span class="sourceLineNo">222</span> }<a name="line.222"></a>
-<span class="sourceLineNo">223</span><a name="line.223"></a>
-<span class="sourceLineNo">224</span> // now we need to actually do the expensive memory allocation step in case of a new chunk,<a name="line.224"></a>
-<span class="sourceLineNo">225</span> // else only the offset is set to the beginning of the chunk to accept allocations<a name="line.225"></a>
-<span class="sourceLineNo">226</span> chunk.init();<a name="line.226"></a>
-<span class="sourceLineNo">227</span> return chunk;<a name="line.227"></a>
-<span class="sourceLineNo">228</span> }<a name="line.228"></a>
-<span class="sourceLineNo">229</span><a name="line.229"></a>
-<span class="sourceLineNo">230</span> /**<a name="line.230"></a>
-<span class="sourceLineNo">231</span> * Creates and inits a chunk of a special size, bigger than a regular chunk size.<a name="line.231"></a>
-<span class="sourceLineNo">232</span> * Such a chunk will never come from pool and will always be on demand allocated.<a name="line.232"></a>
-<span class="sourceLineNo">233</span> * @return the chunk that was initialized<a name="line.233"></a>
-<span class="sourceLineNo">234</span> * @param jumboSize the special size to be used<a name="line.234"></a>
-<span class="sourceLineNo">235</span> */<a name="line.235"></a>
-<span class="sourceLineNo">236</span> Chunk getJumboChunk(int jumboSize) {<a name="line.236"></a>
-<span class="sourceLineNo">237</span> int allocSize = jumboSize + SIZEOF_CHUNK_HEADER;<a name="line.237"></a>
-<span class="sourceLineNo">238</span> if (allocSize <= dataChunksPool.getChunkSize()) {<a name="line.238"></a>
-<span class="sourceLineNo">239</span> LOG.warn("Jumbo chunk size " + jumboSize + " must be more than regular chunk size "<a name="line.239"></a>
-<span class="sourceLineNo">240</span> + dataChunksPool.getChunkSize() + ". Converting to regular chunk.");<a name="line.240"></a>
-<span class="sourceLineNo">241</span> return getChunk(CompactingMemStore.IndexType.CHUNK_MAP);<a name="line.241"></a>
-<span class="sourceLineNo">242</span> }<a name="line.242"></a>
-<span class="sourceLineNo">243</span> // the new chunk is going to hold the jumbo cell data and needs to be referenced by<a name="line.243"></a>
-<span class="sourceLineNo">244</span> // a strong map. Therefore the CCM index type<a name="line.244"></a>
-<span class="sourceLineNo">245</span> return getChunk(CompactingMemStore.IndexType.CHUNK_MAP, allocSize);<a name="line.245"></a>
-<span class="sourceLineNo">246</span> }<a name="line.246"></a>
-<span class="sourceLineNo">247</span><a name="line.247"></a>
-<span class="sourceLineNo">248</span> /**<a name="line.248"></a>
-<span class="sourceLineNo">249</span> * Creates the chunk either onheap or offheap<a name="line.249"></a>
-<span class="sourceLineNo">250</span> * @param pool indicates if the chunks have to be created which will be used by the Pool<a name="line.250"></a>
-<span class="sourceLineNo">251</span> * @param chunkIndexType whether the requested chunk is going to be used with CellChunkMap index<a name="line.251"></a>
-<span class="sourceLineNo">252</span> * @param size the size of the chunk to be allocated, in bytes<a name="line.252"></a>
-<span class="sourceLineNo">253</span> * @return the chunk<a name="line.253"></a>
-<span class="sourceLineNo">254</span> */<a name="line.254"></a>
-<span class="sourceLineNo">255</span> private Chunk createChunk(boolean pool, CompactingMemStore.IndexType chunkIndexType, int size) {<a name="line.255"></a>
-<span class="sourceLineNo">256</span> Chunk chunk = null;<a name="line.256"></a>
-<span class="sourceLineNo">257</span> int id = chunkID.getAndIncrement();<a name="line.257"></a>
-<span class="sourceLineNo">258</span> assert id > 0;<a name="line.258"></a>
-<span class="sourceLineNo">259</span> // do not create offheap chunk on demand<a name="line.259"></a>
-<span class="sourceLineNo">260</span> if (pool && this.offheap) {<a name="line.260"></a>
-<span class="sourceLineNo">261</span> chunk = new OffheapChunk(size, id, pool);<a name="line.261"></a>
-<span class="sourceLineNo">262</span> } else {<a name="line.262"></a>
-<span class="sourceLineNo">263</span> chunk = new OnheapChunk(size, id, pool);<a name="line.263"></a>
-<span class="sourceLineNo">264</span> }<a name="line.264"></a>
-<span class="sourceLineNo">265</span> if (pool || (chunkIndexType == CompactingMemStore.IndexType.CHUNK_MAP)) {<a name="line.265"></a>
-<span class="sourceLineNo">266</span> // put the pool chunk into the chunkIdMap so it is not GC-ed<a name="line.266"></a>
-<span class="sourceLineNo">267</span> this.chunkIdMap.put(chunk.getId(), chunk);<a name="line.267"></a>
-<span class="sourceLineNo">268</span> }<a name="line.268"></a>
-<span class="sourceLineNo">269</span> return chunk;<a name="line.269"></a>
-<span class="sourceLineNo">270</span> }<a name="line.270"></a>
-<span class="sourceLineNo">271</span><a name="line.271"></a>
-<span class="sourceLineNo">272</span> // Chunks from pool are created covered with strong references anyway<a name="line.272"></a>
-<span class="sourceLineNo">273</span> // TODO: change to CHUNK_MAP if it is generally defined<a name="line.273"></a>
-<span class="sourceLineNo">274</span> private Chunk createChunkForPool(CompactingMemStore.IndexType chunkIndexType, int chunkSize) {<a name="line.274"></a>
-<span class="sourceLineNo">275</span> if (chunkSize != dataChunksPool.getChunkSize() &&<a name="line.275"></a>
-<span class="sourceLineNo">276</span> chunkSize != indexChunksPool.getChunkSize()) {<a name="line.276"></a>
-<span class="sourceLineNo">277</span> return null;<a name="line.277"></a>
-<span class="sourceLineNo">278</span> }<a name="line.278"></a>
-<span class="sourceLineNo">279</span> return createChunk(true, chunkIndexType, chunkSize);<a name="line.279"></a>
-<span class="sourceLineNo">280</span> }<a name="line.280"></a>
-<span class="sourceLineNo">281</span><a name="line.281"></a>
-<span class="sourceLineNo">282</span> @VisibleForTesting<a name="line.282"></a>
-<span class="sourceLineNo">283</span> // Used to translate the ChunkID into a chunk ref<a name="line.283"></a>
-<span class="sourceLineNo">284</span> Chunk getChunk(int id) {<a name="line.284"></a>
-<span class="sourceLineNo">285</span> // can return null if chunk was never mapped<a name="line.285"></a>
-<span class="sourceLineNo">286</span> return chunkIdMap.get(id);<a name="line.286"></a>
-<span class="sourceLineNo">287</span> }<a name="line.287"></a>
-<span class="sourceLineNo">288</span><a name="line.288"></a>
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-<span class="sourceLineNo">290</span> return this.offheap;<a name="line.290"></a>
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-<span class="sourceLineNo">292</span><a name="line.292"></a>
-<span class="sourceLineNo">293</span> private void removeChunks(Set<Integer> chunkIDs) {<a name="line.293"></a>
-<span class="sourceLineNo">294</span> this.chunkIdMap.keySet().removeAll(chunkIDs);<a name="line.294"></a>
-<span class="sourceLineNo">295</span> }<a name="line.295"></a>
-<span class="sourceLineNo">296</span><a name="line.296"></a>
-<span class="sourceLineNo">297</span> Chunk removeChunk(int chunkId) {<a name="line.297"></a>
-<span class="sourceLineNo">298</span> return this.chunkIdMap.remove(chunkId);<a name="line.298"></a>
-<span class="sourceLineNo">299</span> }<a name="line.299"></a>
-<span class="sourceLineNo">300</span><a name="line.300"></a>
-<span class="sourceLineNo">301</span> @VisibleForTesting<a name="line.301"></a>
-<span class="sourceLineNo">302</span> // the chunks in the chunkIdMap may already be released so we shouldn't relay<a name="line.302"></a>
-<span class="sourceLineNo">303</span> // on this counting for strong correctness. This method is used only in testing.<a name="line.303"></a>
-<span class="sourceLineNo">304</span> int numberOfMappedChunks() {<a name="line.304"></a>
-<span class="sourceLineNo">305</span> return this.chunkIdMap.size();<a name="line.305"></a>
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-<span class="sourceLineNo">307</span><a name="line.307"></a>
-<span class="sourceLineNo">308</span> @VisibleForTesting<a name="line.308"></a>
-<span class="sourceLineNo">309</span> void clearChunkIds() {<a name="line.309"></a>
-<span class="sourceLineNo">310</span> this.chunkIdMap.clear();<a name="line.310"></a>
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-<span class="sourceLineNo">312</span><a name="line.312"></a>
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-<span class="sourceLineNo">315</span> *<a name="line.315"></a>
-<span class="sourceLineNo">316</span> * MemStoreChunkPool caches a number of retired chunks for reusing, it could<a name="line.316"></a>
-<span class="sourceLineNo">317</span> * decrease allocating bytes when writing, thereby optimizing the garbage<a name="line.317"></a>
-<span class="sourceLineNo">318</span> * collection on JVM.<a name="line.318"></a>
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-<span class="sourceLineNo">332</span> private final AtomicLong chunkCount = new AtomicLong();<a name="line.332"></a>
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-<span class="sourceLineNo">337</span> float poolSizePercentage) {<a name="line.337"></a>
-<span class="sourceLineNo">338</span> this.label = label;<a name="line.338"></a>
-<span class="sourceLineNo">339</span> this.chunkSize = chunkSize;<a name="line.339"></a>
-<span class="sourceLineNo">340</span> this.maxCount = maxCount;<a name="line.340"></a>
-<span class="sourceLineNo">341</span> this.poolSizePercentage = poolSizePercentage;<a name="line.341"></a>
-<span class="sourceLineNo">342</span> this.reclaimedChunks = new LinkedBlockingQueue<>();<a name="line.342"></a>
-<span class="sourceLineNo">343</span> for (int i = 0; i < initialCount; i++) {<a name="line.343"></a>
-<span class="sourceLineNo">344</span> Chunk chunk = createChunk(true, CompactingMemStore.IndexType.ARRAY_MAP, chunkSize);<a name="line.344"></a>
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-<span class="sourceLineNo">348</span> chunkCount.set(initialCount);<a name="line.348"></a>
-<span class="sourceLineNo">349</span> final String n = Thread.currentThread().getName();<a name="line.349"></a>
-<span class="sourceLineNo">350</span> scheduleThreadPool = Executors.newScheduledThreadPool(1, new ThreadFactoryBuilder()<a name="line.350"></a>
-<span class="sourceLineNo">351</span> .setNameFormat(n + "-MemStoreChunkPool Statistics").setDaemon(true).build());<a name="line.351"></a>
-<span class="sourceLineNo">352</span> this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(), statThreadPeriod,<a name="line.352"></a>
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-<span class="sourceLineNo">358</span> * not yet created max allowed chunks count. When we have already created max allowed chunks and<a name="line.358"></a>
-<span class="sourceLineNo">359</span> * no free chunks as of now, return null. It is the responsibility of the caller to make a chunk<a name="line.359"></a>
-<span class="sourceLineNo">360</span> * then.<a name="line.360"></a>
-<span class="sourceLineNo">361</span> * Note: Chunks returned by this pool must be put back to the pool after its use.<a name="line.361"></a>
-<span class="sourceLineNo">362</span> * @return a chunk<a name="line.362"></a>
-<span class="sourceLineNo">363</span> * @see #putbackChunks(Chunk)<a name="line.363"></a>
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-<span class="sourceLineNo">365</span> Chunk getChunk() {<a name="line.365"></a>
-<span class="sourceLineNo">366</span> return getChunk(CompactingMemStore.IndexType.ARRAY_MAP);<a name="line.366"></a>
-<span class="sourceLineNo">367</span> }<a name="line.367"></a>
-<span class="sourceLineNo">368</span><a name="line.368"></a>
-<span class="sourceLineNo">369</span> Chunk getChunk(CompactingMemStore.IndexType chunkIndexType) {<a name="line.369"></a>
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+<span class="sourceLineNo">142</span><a name="line.142"></a>
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+<span class="sourceLineNo">169</span> * @return the chunk that was initialized<a name="line.169"></a>
+<span class="sourceLineNo">170</span> */<a name="line.170"></a>
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+<span class="sourceLineNo">172</span> switch (chunkType) {<a name="line.172"></a>
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+<span class="sourceLineNo">175</span> return getChunk(chunkIndexType, indexChunksPool.getChunkSize());<a name="line.175"></a>
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+<span class="sourceLineNo">179</span> return getChunk(chunkIndexType, chunkSize);<a name="line.179"></a>
+<span class="sourceLineNo">180</span> } else {<a name="line.180"></a>
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+<span class="sourceLineNo">182</span> }<a name="line.182"></a>
+<span class="sourceLineNo">183</span> default:<a name="line.183"></a>
+<span class="sourceLineNo">184</span> throw new IllegalArgumentException(<a name="line.184"></a>
+<span class="sourceLineNo">185</span> "chunkType must either be INDEX_CHUNK or DATA_CHUNK");<a name="line.185"></a>
+<span class="sourceLineNo">186</span> }<a name="line.186"></a>
+<span class="sourceLineNo">187</span> }<a name="line.187"></a>
+<span class="sourceLineNo">188</span><a name="line.188"></a>
+<span class="sourceLineNo">189</span> /**<a name="line.189"></a>
+<span class="sourceLineNo">190</span> * Creates and inits a chunk.<a name="line.190"></a>
+<span class="sourceLineNo">191</span> * @return the chunk that was initialized<a name="line.191"></a>
+<span class="sourceLineNo">192</span> * @param chunkIndexType whether the requested chunk is going to be used with CellChunkMap index<a name="line.192"></a>
+<span class="sourceLineNo">193</span> * @param size the size of the chunk to be allocated, in bytes<a name="line.193"></a>
+<span class="sourceLineNo">194</span> */<a name="line.194"></a>
+<span class="sourceLineNo">195</span> Chunk getChunk(CompactingMemStore.IndexType chunkIndexType, int size) {<a name="line.195"></a>
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+<span class="sourceLineNo">197</span> MemStoreChunkPool pool = null;<a name="line.197"></a>
+<span class="sourceLineNo">198</span><a name="line.198"></a>
+<span class="sourceLineNo">199</span> // if the size is suitable for one of the pools<a name="line.199"></a>
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+<span class="sourceLineNo">201</span> pool = dataChunksPool;<a name="line.201"></a>
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+<span class="sourceLineNo">204</span> }<a name="line.204"></a>
+<span class="sourceLineNo">205</span><a name="line.205"></a>
+<span class="sourceLineNo">206</span> // if we have a pool<a name="line.206"></a>
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+<span class="sourceLineNo">208</span> // the pool creates the chunk internally. The chunk#init() call happens here<a name="line.208"></a>
+<span class="sourceLineNo">209</span> chunk = pool.getChunk();<a name="line.209"></a>
+<span class="sourceLineNo">210</span> // the pool has run out of maxCount<a name="line.210"></a>
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+<span class="sourceLineNo">212</span> if (LOG.isTraceEnabled()) {<a name="line.212"></a>
+<span class="sourceLineNo">213</span> LOG.trace("The chunk pool is full. Reached maxCount= " + pool.getMaxCount()<a name="line.213"></a>
+<span class="sourceLineNo">214</span> + ". Creating chunk onheap.");<a name="line.214"></a>
+<span class="sourceLineNo">215</span> }<a name="line.215"></a>
+<span class="sourceLineNo">216</span> }<a name="line.216"></a>
+<span class="sourceLineNo">217</span> }<a name="line.217"></a>
+<span class="sourceLineNo">218</span><a name="line.218"></a>
+<span class="sourceLineNo">219</span> if (chunk == null) {<a name="line.219"></a>
+<span class="sourceLineNo">220</span> // the second parameter explains whether CellChunkMap index is requested,<a name="line.220"></a>
+<span class="sourceLineNo">221</span> // in that case, put allocated on demand chunk mapping into chunkIdMap<a name="line.221"></a>
+<span class="sourceLineNo">222</span> chunk = createChunk(false, chunkIndexType, size);<a name="line.222"></a>
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+<span class="sourceLineNo">224</span><a name="line.224"></a>
+<span class="sourceLineNo">225</span> // now we need to actually do the expensive memory allocation step in case of a new chunk,<a name="line.225"></a>
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+<span class="sourceLineNo">227</span> chunk.init();<a name="line.227"></a>
+<span class="sourceLineNo">228</span> return chunk;<a name="line.228"></a>
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+<span class="sourceLineNo">230</span><a name="line.230"></a>
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+<span class="sourceLineNo">232</span> * Creates and inits a chunk of a special size, bigger than a regular chunk size.<a name="line.232"></a>
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+<span class="sourceLineNo">235</span> * @param jumboSize the special size to be used<a name="line.235"></a>
+<span class="sourceLineNo">236</span> */<a name="line.236"></a>
+<span class="sourceLineNo">237</span> Chunk getJumboChunk(int jumboSize) {<a name="line.237"></a>
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+<span class="sourceLineNo">239</span> if (allocSize <= dataChunksPool.getChunkSize()) {<a name="line.239"></a>
+<span class="sourceLineNo">240</span> LOG.warn("Jumbo chunk size " + jumboSize + " must be more than regular chunk size "<a name="line.240"></a>
+<span class="sourceLineNo">241</span> + dataChunksPool.getChunkSize() + ". Converting to regular chunk.");<a name="line.241"></a>
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+<span class="sourceLineNo">243</span> }<a name="line.243"></a>
+<span class="sourceLineNo">244</span> // the new chunk is going to hold the jumbo cell data and needs to be referenced by<a name="line.244"></a>
+<span class="sourceLineNo">245</span> // a strong map. Therefore the CCM index type<a name="line.245"></a>
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+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span> /**<a name="line.249"></a>
+<span class="sourceLineNo">250</span> * Creates the chunk either onheap or offheap<a name="line.250"></a>
+<span class="sourceLineNo">251</span> * @param pool indicates if the chunks have to be created which will be used by the Pool<a name="line.251"></a>
+<span class="sourceLineNo">252</span> * @param chunkIndexType whether the requested chunk is going to be used with CellChunkMap index<a name="line.252"></a>
+<span class="sourceLineNo">253</span> * @param size the size of the chunk to be allocated, in bytes<a name="line.253"></a>
+<span class="sourceLineNo">254</span> * @return the chunk<a name="line.254"></a>
+<span class="sourceLineNo">255</span> */<a name="line.255"></a>
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+<span class="sourceLineNo">257</span> Chunk chunk = null;<a name="line.257"></a>
+<span class="sourceLineNo">258</span> int id = chunkID.getAndIncrement();<a name="line.258"></a>
+<span class="sourceLineNo">259</span> assert id > 0;<a name="line.259"></a>
+<span class="sourceLineNo">260</span> // do not create offheap chunk on demand<a name="line.260"></a>
+<span class="sourceLineNo">261</span> if (pool && this.offheap) {<a name="line.261"></a>
+<span class="sourceLineNo">262</span> chunk = new OffheapChunk(size, id, pool);<a name="line.262"></a>
+<span class="sourceLineNo">263</span> } else {<a name="line.263"></a>
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+<span class="sourceLineNo">265</span> }<a name="line.265"></a>
+<span class="sourceLineNo">266</span> if (pool || (chunkIndexType == CompactingMemStore.IndexType.CHUNK_MAP)) {<a name="line.266"></a>
+<span class="sourceLineNo">267</span> // put the pool chunk into the chunkIdMap so it is not GC-ed<a name="line.267"></a>
+<span class="sourceLineNo">268</span> this.chunkIdMap.put(chunk.getId(), chunk);<a name="line.268"></a>
+<span class="sourceLineNo">269</span> }<a name="line.269"></a>
+<span class="sourceLineNo">270</span> return chunk;<a name="line.270"></a>
+<span class="sourceLineNo">271</span> }<a name="line.271"></a>
+<span class="sourceLineNo">272</span><a name="line.272"></a>
+<span class="sourceLineNo">273</span> // Chunks from pool are created covered with strong references anyway<a name="line.273"></a>
+<span class="sourceLineNo">274</span> // TODO: change to CHUNK_MAP if it is generally defined<a name="line.274"></a>
+<span class="sourceLineNo">275</span> private Chunk createChunkForPool(CompactingMemStore.IndexType chunkIndexType, int chunkSize) {<a name="line.275"></a>
+<span class="sourceLineNo">276</span> if (chunkSize != dataChunksPool.getChunkSize() &&<a name="line.276"></a>
+<span class="sourceLineNo">277</span> chunkSize != indexChunksPool.getChunkSize()) {<a name="line.277"></a>
+<span class="sourceLineNo">278</span> return null;<a name="line.278"></a>
+<span class="sourceLineNo">279</span> }<a name="line.279"></a>
+<span class="sourceLineNo">280</span> return createChunk(true, chunkIndexType, chunkSize);<a name="line.280"></a>
+<span class="sourceLineNo">281</span> }<a name="line.281"></a>
+<span class="sourceLineNo">282</span><a name="line.282"></a>
+<span class="sourceLineNo">283</span> @VisibleForTesting<a name="line.283"></a>
+<span class="sourceLineNo">284</span> // Used to translate the ChunkID into a chunk ref<a name="line.284"></a>
+<span class="sourceLineNo">285</span> Chunk getChunk(int id) {<a name="line.285"></a>
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+<span class="sourceLineNo">287</span> return chunkIdMap.get(id);<a name="line.287"></a>
+<span class="sourceLineNo">288</span> }<a name="line.288"></a>
+<span class="sourceLineNo">289</span><a name="line.289"></a>
+<span class="sourceLineNo">290</span> boolean isOffheap() {<a name="line.290"></a>
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+<span class="sourceLineNo">292</span> }<a name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span> private void removeChunks(Set<Integer> chunkIDs) {<a name="line.294"></a>
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+<span class="sourceLineNo">296</span> }<a name="line.296"></a>
+<span class="sourceLineNo">297</span><a name="line.297"></a>
+<span class="sourceLineNo">298</span> Chunk removeChunk(int chunkId) {<a name="line.298"></a>
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+<span class="sourceLineNo">300</span> }<a name="line.300"></a>
+<span class="sourceLineNo">301</span><a name="line.301"></a>
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+<span class="sourceLineNo">304</span> // on this counting for strong correctness. This method is used only in testing.<a name="line.304"></a>
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+<span class="sourceLineNo">307</span> }<a name="line.307"></a>
+<span class="sourceLineNo">308</span><a name="line.308"></a>
+<span class="sourceLineNo">309</span> @VisibleForTesting<a name="line.309"></a>
+<span class="sourceLineNo">310</span> void clearChunkIds() {<a name="line.310"></a>
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+<span class="sourceLineNo">313</span><a name="line.313"></a>
+<span class="sourceLineNo">314</span> /**<a name="line.314"></a>
+<span class="sourceLineNo">315</span> * A pool of {@link Chunk} instances.<a name="line.315"></a>
+<span class="sourceLineNo">316</span> *<a name="line.316"></a>
+<span class="sourceLineNo">317</span> * MemStoreChunkPool caches a number of retired chunks for reusing, it could<a name="line.317"></a>
+<span class="sourceLineNo">318</span> * decrease allocating bytes when writing, thereby optimizing the garbage<a name="line.318"></a>
+<span class="sourceLineNo">319</span> * collection on JVM.<a name="line.319"></a>
+<span class="sourceLineNo">320</span> */<a name="line.320"></a>
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+<span class="sourceLineNo">322</span> private final int chunkSize;<a name="line.322"></a>
+<span class="sourceLineNo">323</span> private int maxCount;<a name="line.323"></a>
+<span class="sourceLineNo">324</span><a name="line.324"></a>
+<span class="sourceLineNo">325</span> // A queue of reclaimed chunks<a name="line.325"></a>
+<span class="sourceLineNo">326</span> private final BlockingQueue<Chunk> reclaimedChunks;<a name="line.326"></a>
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+<span class="sourceLineNo">328</span><a name="line.328"></a>
+<span class="sourceLineNo">329</span> /** Statistics thread schedule pool */<a name="line.329"></a>
+<span class="sourceLineNo">330</span> private final ScheduledExecutorService scheduleThreadPool;<a name="line.330"></a>
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+<span class="sourceLineNo">332</span> private static final int statThreadPeriod = 60 * 5;<a name="line.332"></a>
+<span class="sourceLineNo">333</span> private final AtomicLong chunkCount = new AtomicLong();<a name="line.333"></a>
+<span class="sourceLineNo">334</span> private final LongAdder reusedChunkCount = new LongAdder();<a name="line.334"></a>
+<span class="sourceLineNo">335</span> private final String label;<a name="line.335"></a>
+<span class="sourceLineNo">336</span><a name="line.336"></a>
+<span class="sourceLineNo">337</span> MemStoreChunkPool(String label, int chunkSize, int maxCount, int initialCount,<a name="line.337"></a>
+<span class="sourceLineNo">338</span> float poolSizePercentage) {<a name="line.338"></a>
+<span class="sourceLineNo">339</span> this.label = label;<a name="line.339"></a>
+<span class="sourceLineNo">340</span> this.chunkSize = chunkSize;<a name="line.340"></a>
+<span class="sourceLineNo">341</span> this.maxCount = maxCount;<a name="line.341"></a>
+<span class="sourceLineNo">342</span> this.poolSizePercentage = poolSizePercentage;<a name="line.342"></a>
+<span class="sourceLineNo">343</span> this.reclaimedChunks = new LinkedBlockingQueue<>();<a name="line.343"></a>
+<span class="sourceLineNo">344</span> for (int i = 0; i < initialCount; i++) {<a name="line.344"></a>
+<span class="sourceLineNo">345</span> Chunk chunk = createChunk(true, CompactingMemStore.IndexType.ARRAY_MAP, chunkSize);<a name="line.345"></a>
+<span class="sourceLineNo">346</span> chunk.init();<a name="line.346"></a>
+<span class="sourceLineNo">347</span> reclaimedChunks.add(chunk);<a name="line.347"></a>
+<span class="sourceLineNo">348</span> }<a name="line.348"></a>
+<span class="sourceLineNo">349</span> chunkCount.set(initialCount);<a name="line.349"></a>
+<span class="sourceLineNo">350</span> final String n = Thread.currentThread().getName();<a name="line.350"></a>
+<span class="sourceLineNo">351</span> scheduleThreadPool = Executors.newScheduledThreadPool(1, new ThreadFactoryBuilder()<a name="line.351"></a>
+<span class="sourceLineNo">352</span> .setNameFormat(n + "-MemStoreChunkPool Statistics").setDaemon(true).build());<a name="line.352"></a>
+<span class="sourceLineNo">353</span> this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(), statThreadPeriod,<a name="line.353"></a>
+<span class="sourceLineNo">354</span> statThreadPeriod, TimeUnit.SECONDS);<a name="line.354"></a>
+<span class="sourceLineNo">355</span> }<a name="line.355"></a>
+<span class="sourceLineNo">356</span><a name="line.356"></a>
+<span class="sourceLineNo">357</span> /**<a name="line.357"></a>
+<span class="sourceLineNo">358</span> * Poll a chunk from the pool, reset it if not null, else create a new chunk to return if we have<a name="line.358"></a>
+<span class="sourceLineNo">359</span> * not yet created max allowed chunks count. When we have already created max allowed chunks and<a name="line.359"></a>
+<span class="sourceLineNo">360</span> * no free chunks as of now, return null. It is the responsibility of the caller to make a chunk<a name="line.360"></a>
+<span class="sourceLineNo">361</span> * then.<a name="line.361"></a>
+<span class="sourceLineNo">362</span> * Note: Chunks returned by this pool must be put back to the pool after its use.<a name="line.362"></a>
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+<span class="sourceLineNo">431</span> (total == 0? "0": StringUtils.formatPercent((float)reused/(float)total,2)));<a name="line.431"></a>
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+<span class="sourceLineNo">454</span> newMaxCount);<a name="line.454"></a>
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+<span class="sourceLineNo">459</span> LOG.info("{} max count for chunks decreased from {} to {}", this.label, this.maxCount,<a name="line.459"></a>
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+<span class="sourceLineNo">502</span> initialCount, poolSizePercentage);<a name="line.502"></a>
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+<span cla
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