[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1174: Concurrently write time partition

[GitBox <gi...@apache.org>]

qiaojialin commented on a change in pull request #1174:
URL: https://github.com/apache/incubator-iotdb/pull/1174#discussion_r422570076



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File path: server/src/main/java/org/apache/iotdb/db/conf/adapter/IoTDBConfigDynamicAdapter.java
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@@ -30,86 +30,70 @@
  * This class is to dynamically adjust some important parameters of the system, determine the speed
  * of MenTable brushing disk, the speed of file sealing and so on, with the continuous change of
  * load in the process of system operation.
- *
+ * <p>
  * There are three dynamically adjustable parameters: maxMemTableNum, memtableSize and
  * tsFileSizeThreshold.
- *
+ * <p>
  * 1. maxMemTableNum. This parameter represents the size of the MemTable available in the MemTable
  * pool, which is closely related to the number of storage groups. When adding or deleting a storage
  * group, the parameter also adds or deletes four MemTables. The reason why adding or deleting four
  * MemTables is that when the system is running stably, the speed of the flush operation is faster
  * than that of data writing, so one is used for the Flush process and the other is used for data
  * writing. Otherwise, the system should limit the speed of data writing to maintain stability. And
  * two for sequence data, two for unsequence data.
- *
+ * <p>
  * 2. memtableSize. This parameter determines the threshold value for the MemTable in memory to be
  * flushed into disk. When the system load increases, the parameter should be set smaller so that
  * the data in memory can be flushed into disk as soon as possible.
- *
+ * <p>
  * 3. tsFileSizeThreshold. This parameter determines the speed of the tsfile seal, and then
  * determines the maximum size of metadata information maintained in memory. When the system load
  * increases, the parameter should be smaller to seal the file as soon as possible, release the
  * memory occupied by the corresponding metadata information as soon as possible.
- *
+ * <p>
  * The following equation is used to adjust the dynamic parameters of the data:
- *
- * Abbreviation of parameters:
- * 1 memtableSize: m
- * 2 maxMemTableNum: Nm
- * 3 maxSeriesNumberAmongStorageGroup: Ns
- * 4 tsFileSizeThreshold: Sf
- * 5 CompressionRatio: c
- * 6 chunk metadata size: a
- * 7 static memory: b
- * 8 allocate memory for write: S
- *
- * The equation: m * Nm + Nm * Ns * Sf * a * c / m + b = S
- * Namely: MemTable data memory size + chunk metadata memory size + static memory size = memory size for write
- *
+ * <p>
+ * Abbreviation of parameters: 1 memtableSize: m 2 maxMemTableNum: Nm 3
+ * maxSeriesNumberAmongStorageGroup: Ns 4 tsFileSizeThreshold: Sf 5 CompressionRatio: c 6 chunk
+ * metadata size: a 7 static memory: b 8 allocate memory for write: S
+ * <p>
+ * The equation: m * Nm + Nm * Ns * Sf * a * c / m + b = S Namely: MemTable data memory size + chunk
+ * metadata memory size + static memory size = memory size for write

Review comment:
       format back




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