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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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10
mysql-test/main/query_cache_notembedded.result
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@ -111,7 +111,7 @@ disconnect root;
disconnect root2;
flush query cache;
reset query cache;
flush status;
flush global status;
create table t1 (s1 int)//
create procedure f1 () begin
select sql_cache * from t1;
@ -215,7 +215,7 @@ Variable_name Value
Qcache_hits 10
flush query cache;
reset query cache;
flush status;
flush global status;
select sql_cache * from t1;
s1
1
@ -374,7 +374,7 @@ connection default;
set GLOBAL query_cache_size=0;
SET @@global.log_bin_trust_function_creators = @old_log_bin_trust_function_creators;
DROP DATABASE IF EXISTS bug30269;
FLUSH STATUS;
FLUSH GLOBAL STATUS;
CREATE DATABASE bug30269;
USE bug30269;
CREATE TABLE test1 (id int, name varchar(23));
@ -427,7 +427,7 @@ end|
insert into t1 values ("x", 3), ("y", 5)|
set @x = @@query_cache_size|
set global query_cache_size = 10*1024*1024|
flush status|
flush global status|
flush query cache|
show status like 'Qcache_hits'|
Variable_name Value
@ -457,7 +457,7 @@ show status like 'Qcache_hits'|
Variable_name Value
Qcache_hits 2
set global query_cache_size = @x|
flush status|
flush global status|
flush query cache|
delete from t1|
drop procedure bug3583|