1975
MySQLERRORCommonConfigurationHIGH confidence
Variable is a GLOBAL variable
Production Risk
Low — set statement is rejected; no configuration change occurs.
What this means
An attempt was made to set a variable using SET SESSION (or the session-level syntax) when the variable can only be changed at the global level.
Why it happens
- 1SET SESSION innodb_buffer_pool_size = ... on a variable that is global-only.
- 2Using SESSION scope qualifier on a variable that only supports GLOBAL scope.
How to reproduce
trigger — this will error
trigger — this will error
SET SESSION innodb_buffer_pool_size = 134217728;
expected output
ERROR 1229 (HY000): Variable 'innodb_buffer_pool_size' is a GLOBAL variable and should be set with SET GLOBAL.
Fix
Use SET GLOBAL for global-only variables
Use SET GLOBAL for global-only variables
SET GLOBAL innodb_buffer_pool_size = 134217728;
Why this works
Global-only variables affect the entire server and must be set at the global scope.
Sources
Official documentation ↗
MySQL 8.0 — 1975 ER_GLOBAL_VARIABLE
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