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MDEV-33145 Add FLUSH GLOBAL STATUS

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- FLUSH GLOBAL STATUS now resets most global_status_vars.
  At this stage, this is mainly to be used for testing.
- FLUSH SESSION STATUS added as an alias for FLUSH STATUS.
- FLUSH STATUS does not require any privilege (before required RELOAD).
- FLUSH GLOBAL STATUS requires RELOAD privilege.
- All global status reset moved to FLUSH GLOBAL STATUS.
- Replication semisync status variables are now reset by
  FLUSH GLOBAL STATUS.
- In test cases, the only changes are:
  - Replace FLUSH STATUS with FLUSH GLOBAL STATUS
  - Replace FLUSH STATUS with FLUSH STATUS; FLUSH GLOBAL STATUS.
    This was only done in a few tests where the test was using SHOW STATUS
    for both local and global variables.
- Uptime_since_flush_status is now always provided, independent if
  ENABLED_PROFILING is enabled when compiling MariaDB.
- @@global.Uptime_since_flush_status is reset on FLUSH GLOBAL STATUS
  and @@session.Uptime_since_flush_status is reset on FLUSH SESSION STATUS.
- When connected, @@session.Uptime_since_flush_status is set to 0.
This commit is contained in:
Monty
2023-12-31 16:23:04 +02:00
committed by Sergei Golubchik
parent d2b39a2c82
commit 775cba4d0f
325 changed files with 787 additions and 525 deletions
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6
sql/sql_reload.cc
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@@ -379,8 +379,10 @@ bool reload_acl_and_cache(THD *thd, unsigned long long options,
#endif
if (options & REFRESH_HOSTS)
hostname_cache_refresh();
if (thd && (options & REFRESH_STATUS))
refresh_status(thd);
if (thd && (options & REFRESH_SESSION_STATUS))
refresh_session_status(thd);
if ((options & REFRESH_GLOBAL_STATUS))
refresh_global_status();
if (options & REFRESH_THREADS)
thread_cache.flush();
#ifdef HAVE_REPLICATION