Bug #74169 performance_schema_max_memory_classes has new default value in 5.7.5
Submitted: 1 Oct 2014 3:32 Modified: 2 Oct 2014 14:08
Reporter: Jesper wisborg Krogh Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Documentation Severity:S3 (Non-critical)
Version: OS:Any
Assigned to: Paul DuBois CPU Architecture:Any

[1 Oct 2014 3:32] Jesper wisborg Krogh 
Description:
The default value of performance_schema_max_memory_classes was changed to 320 in 5.7.5

How to repeat:
See http://dev.mysql.com/doc/refman/5.7/en/performance-schema-system-variables.html#sysvar_per...

and:

mysql> SELECT * FROM information_schema.GLOBAL_VARIABLES WHERE VARIABLE_NAME IN ('version', 'performance_schema_max_memory_classes');
+---------------------------------------+----------------+
| VARIABLE_NAME                         | VARIABLE_VALUE |
+---------------------------------------+----------------+
| VERSION                               | 5.7.4-m14      |
| PERFORMANCE_SCHEMA_MAX_MEMORY_CLASSES | 250            |
+---------------------------------------+----------------+
2 rows in set (0.00 sec)

mysql> SELECT * FROM information_schema.GLOBAL_VARIABLES WHERE VARIABLE_NAME IN ('version', 'performance_schema_max_memory_classes');
+---------------------------------------+----------------+
| VARIABLE_NAME                         | VARIABLE_VALUE |
+---------------------------------------+----------------+
| VERSION                               | 5.7.5-m15      |
| PERFORMANCE_SCHEMA_MAX_MEMORY_CLASSES | 320            |
+---------------------------------------+----------------+
2 rows in set (0.07 sec)

Suggested fix:
Update the default value to be 320 in 5.7.5.
[2 Oct 2014 14:08] Paul DuBois 
Thank you for your bug report. This issue has been addressed in the documentation. The updated documentation will appear on our website shortly.