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• performance_schema_setup_objects_size 

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The number of rows in the setup_objects  table. 

• performance_schema_show_processlist 

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The SHOW PROCESSLIST  statement provides process information by collecting thread data from all active threads. The performance_schema_show_processlist  variable determines which SHOW PROCESSLIST  implementation to use: 

•The default implementation iterates across active threads from within the thread manager while holding a global mutex. This has negative performance consequences, particularly on busy systems. 

•The alternative SHOW PROCESSLIST  implementation is based on the Performance Schema processlist  table. This implementation queries active thread data from the Performance Schema rather than the thread manager and does not require a mutex. 

To enable the alternative implementation, enable the performance_schema_show_processlist system variable. To ensure that the default and alternative implementations yield the same information, certain configuration requirements must be met; see Section 27.12.21.5, “The processlist Table” . 

• performance_schema_users_size 

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