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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/suite/perfschema/r/start_server_low_index.result
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@ -188,7 +188,7 @@ select variable_value > 0 from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value > 0
1
FLUSH STATUS;
FLUSH GLOBAL STATUS;
select variable_value from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value
@ -239,7 +239,7 @@ select variable_value > 0 from information_schema.global_status
where variable_name like 'PERFORMANCE_SCHEMA_INDEX_STAT_LOST';
variable_value > 0
1
FLUSH STATUS;
FLUSH GLOBAL STATUS;
update performance_schema.setup_objects set ENABLED='NO' where OBJECT_TYPE='TABLE';
insert into db1.t1 values('5', 'abc');
insert into db1.t1 values('6', 'abc');