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https://issues.apache.org/jira/browse/FLINK-15512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yu Li closed FLINK-15512.
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Resolution: Implemented
Merged in
master via: 346e2e02af385d7482376c25d2c3de09b89c1111
release-1.10 via: 1cd7cee8fc02061945220dcd8d83abf0f04cdaf6
> Refactor the mechanism of how to constructure the cache and write buffer
> manager shared across RocksDB instances
> -----------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-15512
> URL: https://issues.apache.org/jira/browse/FLINK-15512
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / State Backends
> Reporter: Yun Tang
> Assignee: Yun Tang
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> FLINK-14484 introduce a {{LRUCache}} to share among RocksDB instances, so
> that the memory usage by RocksDB could be controlled well. However, due to
> the implementation and some bugs in RocksDB
> ([issue-6247|https://github.com/facebook/rocksdb/issues/6247]), we cannot
> limit the memory strictly.
> The way to walk around this issue is to consider the buffer which memtable
> would overuse (1/2 write buffer manager size). By introducing this, the
> actual cache size for user to share is not the same as the managed off-heap
> memory or user configured memory.
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