If the value returned from this counter is large, you may want to increase the value of tmp_table_size or max_heap_table_size to lessen the likelihood that internal temporary tables in memory will be converted to on-disk tables. The maximum size for in-memory temporary tables is the minimum of the tmp_table_size or max_heap_table_size values, whichever is less. If an internal temporary table is initially created as an in-memory table but becomes too large, MySQL automatically converts it to an on-disk table. The number of internal, on-disk, temporary tables created by the server while executing statements. The number of kilobytes sent to all clients. It will return the difference between two polling intervals. This component has the Count statistic as difference option enabled. The number of kilobytes received from all clients. This component monitor returns the possible total memory usage of MySQL, in MB, using the following formula: read_buffer_size+sort_buffer_size)*max_connections+key_buffer_size. See also Manage application monitor thresholds in SAM. What's the formula to calculate Key Efficiency, Key Buffer Used, and Query Cache Hitrate in MySql?(© 2021 Stack Exchange, available at, obtained on September 28, 2021)Ĭomponents without predetermined threshold values provide guidance such as "Use the lowest threshold possible" or "Use the highest threshold possible" to help you find a threshold appropriate for your application. Server System Variables (© 2021 Oracle Corp., available at /doc/, obtained on September 28, 2021).ADDRESS is the IP address of your SolarWinds Platform server.USERNAME is a user with administrative privileges.Log in to the MySQL database and execute the following query: Install MySQL ODBC on the SolarWinds Platform server.Įnable remote access on the MySQL Database Server. This SAM application monitor template assesses the performance of a MySQL Server database by retrieving performance data from the built-in performance_schema.global_status pseudo-table.
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