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MDEV-17251 SHOW STATUS unnecessary calls calc_sum_of_all_status

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1. only call calc_sum_of_all_status() if a global
   SHOW_xxx_STATUS variable is to be returned
2. only lock LOCK_status when copying global_status_var,
   but not when iterating all threads
This commit is contained in:
Sergei Golubchik
2021-01-07 19:37:47 +01:00
parent 4c448836d4
commit 63f9192787
4 changed files with 16 additions and 11 deletions
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5
sql/sql_plugin.h
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@ -22,9 +22,10 @@
that is defined in plugin.h
*/
#define SHOW_always_last SHOW_KEY_CACHE_LONG, \
SHOW_LONG_STATUS, SHOW_DOUBLE_STATUS, \
SHOW_HAVE, SHOW_MY_BOOL, SHOW_HA_ROWS, SHOW_SYS, \
SHOW_LONG_NOFLUSH, SHOW_LONGLONG_STATUS, SHOW_LEX_STRING
SHOW_LONG_NOFLUSH, SHOW_LEX_STRING, \
/* SHOW_*_STATUS must be at the end, SHOW_LONG_STATUS being first */ \
SHOW_LONG_STATUS, SHOW_DOUBLE_STATUS, SHOW_LONGLONG_STATUS
#include <my_global.h>
#undef SHOW_always_last