Alexei Scherbakov created IGNITE-4552:
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Summary: Optimize GridDhtLocalPartition.rmvQueue
Key: IGNITE-4552
URL: https://issues.apache.org/jira/browse/IGNITE-4552
Project: Ignite
Issue Type: Bug
Components: cache
Affects Versions: 1.6
Reporter: Alexei Scherbakov
Fix For: 2,0
Current implementation stores deferred entry removals in rmvQueue for
consistency guaranties.
This can lead to significant heap over-usage(I observed several Gbs) in case of
many caches with removals, because currently queue is cleared lazily after
reaching max capacity(200_000 by default).
This can be mitigated by using lower IGNITE_ATOMIC_CACHE_DELETE_HISTORY_SIZE,
but can lead to consistency issues in case of frequent cache updates.
Possible optimizations:
* Use single fixed size queue per all caches to overcome limitations of
IGNITE_ATOMIC_CACHE_DELETE_HISTORY_SIZE workaround.
* Do queue cleaning in background
* Move queue to an off-heap.
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