Count connections differently #3
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The `INFORMATION_SCHEMA.SESSION_STATUS` table allows us to get a total count of the number of "Threads Connected" which is equivalent to the previous `SELECT count(*) FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER != 'system user'` query.` Additinally, the `INFORMATION_SCHEMA.SESSION_STATUS` table lets us get a count of the number of "Threads Running" which gives a slightly more accurate indication of the amount of load the DB is actually recieving from all of its connections. The real benefit, though, is that queries to the `INFORMATION_SCHEMA.SESSION_STATUS` table don't require any additional privilages be granted to the MySQL user running the queries. Granting the `PROCESS` permissions (as was previously required) allows visibility into the contents of MySQL queries being run by all connected MySQL users.
I'm not sure what an underscore does at the beginning of an import line & I'm not going to take the time to look it up right now :-P
metavida
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Aug 31, 2015
Count connections differently
metavida
added a commit
that referenced
this pull request
Aug 31, 2015
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Use the
SESSION_STATUStable instead ofPROCESSLISTtable because:INFORMATION_SCHEMA.SESSION_STATUStable allows us to get a total count of the number of "Threads Connected" which is equivalent to the previousSELECT count(*) FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER != 'system user'query.`INFORMATION_SCHEMA.SESSION_STATUStable lets us get a count of the number of "Threads Running" which gives a slightly more accurate indication of the amount of load the DB is actually recieving from all of its connections.INFORMATION_SCHEMA.SESSION_STATUStable don't require any additional privilages be granted to the MySQL user running the queries. Granting thePROCESSpermissions (as was previously required) allows visibility into the contents of MySQL queries being run by all connected MySQL users.