Vladimir Ozerov created IGNITE-7866:
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Summary: TcpCommunicationSpi metrics causes cache operations
slowdown
Key: IGNITE-7866
URL: https://issues.apache.org/jira/browse/IGNITE-7866
Project: Ignite
Issue Type: Task
Components: general
Affects Versions: 2.4
Reporter: Vladimir Ozerov
Assignee: Vladimir Ozerov
Fix For: 2.4
Extended TCP metrics were added as a part of IGNITE-6868 ticket. Unfortunately,
they causes ~5-10% performance drop for cache operations when working in
in-memory mode. Causes:
1) Contention on shared data structures (LongAdder, CMH)
2) A lot of string comparisons because we use class names to track particulat
message types
Suggested fix:
1) Move all processing to NIO threads
2) Introcduce thread-local state and update it from NIO threads
3) Metrics readers should merge state from all NIO threads
4) User {{Message}} type ID instead of class names
5) When returning final result we should use {{Class.getName()}} instead of
{{Class.getSimpleName()}}
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