proxysql

History

Rene Cannao a2e99eed50 perf(mysqlx): only invoke handler() for sessions with real work process_all_sessions previously forced sess->to_process=true on every tick and unconditionally called sess->handler(), burning CPU at large idle session counts (one full state-machine traversal per session per loop iteration, regardless of whether anything had changed). Now only call handler() when at least one of these is true: - a poll event landed on the client or server data stream - the session self-flagged to_process (handler wants to re-run) - a complete frame is already buffered on either stream Also make Mysqlx_Thread::sessions_mutex_ mutable and take it in get_session_count() const. Previously const accessors that needed to lock the mutex couldn't — and the session count was read without the lock at all, racing the writer that appends/removes sessions.	1 month ago
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mysqlx	perf(mysqlx): only invoke handler() for sessions with real work	1 month ago

Rene Cannao a2e99eed50 perf(mysqlx): only invoke handler() for sessions with real work

process_all_sessions previously forced sess->to_process=true on every
tick and unconditionally called sess->handler(), burning CPU at large
idle session counts (one full state-machine traversal per session per
loop iteration, regardless of whether anything had changed).

Now only call handler() when at least one of these is true:
  - a poll event landed on the client or server data stream
  - the session self-flagged to_process (handler wants to re-run)
  - a complete frame is already buffered on either stream

Also make Mysqlx_Thread::sessions_mutex_ mutable and take it in
get_session_count() const. Previously const accessors that needed to
lock the mutex couldn't — and the session count was read without the
lock at all, racing the writer that appends/removes sessions.

mysqlx

perf(mysqlx): only invoke handler() for sessions with real work