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https://issues.apache.org/jira/browse/IGNITE-8681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531629#comment-16531629
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Ivan Rakov commented on IGNITE-8681:
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Thanks for your contribution! Merged to master.
> Using ExpiryPolicy with persistence causes significant slowdown.
> ----------------------------------------------------------------
>
> Key: IGNITE-8681
> URL: https://issues.apache.org/jira/browse/IGNITE-8681
> Project: Ignite
> Issue Type: Improvement
> Components: cache
> Reporter: Andrew Mashenkov
> Assignee: Andrew Mashenkov
> Priority: Critical
> Labels: performance
> Fix For: 2.7
>
>
> Almost all ignite operations calls CU.unwindEvicts() on finish to help to
> evict expired entries.
> In unwindEvicts(), threads iterate over all node partitions and check every
> partition PendingTree for expired entries. This costs too much.
> We already have a flag on per-cachegroup basis that indicated ExpiryPolicy is
> used. It raised once expiring entry has been put to cache or we initialize
> non-empty pending tree from persistence.
> So, we have to optimize a case when there is no expired pending entries, but
> pending tree is non-empty.
> We can add some throttling on per-partition basis to reduce useless pending
> tree lookups.
> E.g. if there is nothing to clean, no thread should check partition during
> next 100ms interval.
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