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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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4
mysql-test/include/query_cache_sql_prepare.inc
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@@ -30,7 +30,7 @@ connection default;
set @initial_query_cache_size = @@global.query_cache_size;
set @@global.query_cache_size=102400;
flush status;
flush global status;
--disable_warnings
drop table if exists t1;
--enable_warnings
@@ -485,7 +485,7 @@ drop table if exists t1;
--enable_warnings
create table t1 (a varchar(255));
insert into t1 (a) values ("Pack my box with five dozen liquor jugs.");
flush status;
flush global status;
prepare stmt from "select a from t1";
execute stmt;
set @@global.query_cache_size=0;