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Defines a page-full percentage value for index pages that overrides the current MERGE_THRESHOLD setting for all indexes that are currently in the dictionary cache. This option is only available if debugging support is compiled in using the WITH_DEBUG CMake  option. For related information, see Section 15.8.11, “Configuring the Merge Threshold for Index Pages” . 

• innodb_monitor_disable 

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Disables InnoDB  metrics counters. Counter data may be queried using the INFORMATION_SCHEMA.INNODB_METRICS  table. For usage information, see Section 15.15.6, “InnoDB INFORMATION_SCHEMA Metrics Table” . 

innodb_monitor_disable=’latch’  disables statistics collection for SHOW ENGINE INNODB MUTEX . For more information, see Section 13.7.7.15, “SHOW ENGINE Statement” . 

• innodb_monitor_enable 

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Enables InnoDB  metrics counters. Counter data may be queried using the INFORMATION_SCHEMA.INNODB_METRICS  table. For usage information, see Section 15.15.6, “InnoDB INFORMATION_SCHEMA Metrics Table” . 

innodb_monitor_enable=’latch’  enables statistics collection for SHOW ENGINE INNODB MUTEX . For more information, see Section 13.7.7.15, “SHOW ENGINE Statement” . 

• innodb_monitor_reset 

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