Mysql slave invalidating query cache entries table

22 Oct

From the bug reports, it seems to make a difference...

Any help as to how best to test my theory would be greatly appreciated.

If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave.

mysql_long_quarys SELECT url, owner FROM phurl_urls WHERE BINARY code = 'BSFz TEub';# Time: 130629 # [email protected]: sam117_crypt[sam117_crypt] @ localhost []# Thread_id: 13 Schema: sam117_crypt# Query_time: 0.002139 Lock_time: 0.000052 Rows_sent: 1 Rows_examined: 9006 Rows_affected: 0 Rows_read: 9006SELECT url, owner FROM phurl_urls WHERE BINARY code = '3LKm8i Qt';# [email protected]: sam117_crypt[sam117_crypt] @ localhost []# Thread_id: 14 Schema: sam117_crypt# Query_time: 0.002205 Lock_time: 0.000052 Rows_sent: 1 Rows_examined: 9006 Rows_affected: 0 Rows_read: 9006SELECT url, owner FROM phurl_urls WHERE BINARY code = 'OIv4K1gb';# [email protected]: sam117_crypt[sam117_crypt] @ localhost []# Thread_id: 15 Schema: sam117_crypt# Query_time: 0.002200 Lock_time: 0.000052 Rows_sent: 1 Rows_examined: 9006 Rows_affected: 0 Rows_read: 9006SELECT url, owner FROM phurl_urls WHERE BINARY code = 'Z8ze DBv E'; phurl_urls code id , code - .

the global Were the size and type set to 0 when the server was started, or later?

Database performance depends on several factors at the database level, such as tables, queries, and configuration settings.

These software constructs result in CPU and I/O operations at the hardware level, which you must minimize and make as efficient as possible.

Mechanism forcleaning cache entries deletes them always, when any table from cached queryis modified.

I think, it would be better to clean it only, when relevantcolumns (those, used in the query) are changed ( in case of anydelete/insert of course).