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Posted to notifications@accumulo.apache.org by GitBox <gi...@apache.org> on 2022/07/11 12:31:24 UTC

[GitHub] [accumulo] dlmarion commented on issue #1610: Determine if using Guava Suppliers.memoizeWithExpiration in compaction is too expensive

dlmarion commented on issue #1610:
URL: https://github.com/apache/accumulo/issues/1610#issuecomment-1180352031

   According to the `Suppliers.memoizeWithExpiration()` javadoc and source, the return value of the supplier is cached for the specified duration. So, the code in `CompactableImpl.CompactionCheck.memoizedCheck` is invoked every 100ms. In the case of a compaction that is running this seems better than the suggestion above. However, in the case of a compaction thread that is slow (e.g. user iterators, waiting on I/O or CPU), 100ms might be too low of a value.


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