Posted by: Muntaquim Bagadia Date: December 03, 2013 01:14AM No,nothing else was touching this - the load on the server was also normal during this time. December 04, 2013 11:55PM Re: A simple update query taking long time. Use timeouts to prevent long-running SELECT queries from taking down your MySQL. SQL update satement taking a very long time / high disk usage for hours. Set slow_query_log_file to the path where you want to save the file. There is a large disk space concern with the slow query log file, which needs to be attended to continually until the slow query log feature is disabled. If the refresh time is slow, then the query is slow. Re: A simple update query taking long time. New Topic. The refresh time is strictly related to what your query does, and the measures you wrote. Advanced Search. PBI has power query and power pivot as modelling tools. Accompanied by the slow_query_log variable are the long_query_time and min_examined_row_limit which impacts how the slow query … The query that now generates most slow queries is the following (see result from mysqldumpslow): Count: 433 Time=3.40s (1470s) Lock=0.00s (0s) Rows=0.0 (0), UPDATE user_sessions SET tid='S' WHERE idsession='S' I am very surprised to have so many long queries for such a simple query with no locking. MySQL Forums Forum List » Newbie. Rick James. This is an Innodb table. The slow query log consists of SQL statements that take more than long_query_time seconds to execute and require at least min_examined_row_limit rows to be examined. New Topic. Re: A simple update query taking long time. If this variable is not set, it will use the DATA_DIR of your MySQL data directory.. Fyi, the table is InnoDB and has 14000 rows. Options: Reply• … Posted by: Rick James ... A simple update query taking long time. To use it, open the my.cnf file and set the slow_query_log variable to "On." in Linux/Unix by Prabhu Balakrishnan on February 7, 2011 I recently had an issue with mysql database and the database has grown too large about 200k records and i was needing to delete all junk and needless data of approx 50k rows in my table. MySQL has a built-in slow query log. Navigate: Previous Message• Next Message. Advanced Search. Muntaquim Bagadia. (google sheets in your case). The query I am using is: USE the_db; UPDATE table1 JOIN table2 ON table2.a = table1.b SET table1.c = "Y"; I've changed the names of the tables and columns, but the query is exactly the same. Set long_query_time to the number of seconds that a query should take to be considered slow, say 0.2. Keep in mind, the lower your long_query_time directive the faster the slow query log fills up a disk partition I've looked at other answers on here and all of them take a very long time as well. MySQL delete is very slow and takes long time! Navigate: Previous Message• Next Message. Posted by: Muntaquim Bagadia Date: December 05, 2013 09:48PM There are other MyISAM tables in the database - wouldn't query cache help in performance of those tables? MySQL Forums Forum List » Newbie. Unlike excel version, you cannot bring data directly in Power Pivot, so you have a query from a website. Any help would be appreciated, thanks. New Topic. Advanced Search. Here is a select query which executes in 0.03 sec: select * from engine.transactions where transaction_row not in (select transaction_row from d.pos_transactions) I want to update the matched (selected) rows from the query above this way: The slow query log can be used to find queries that take a long time to execute … Re: A simple update query taking long time. MySQL Forums Forum List » Newbie. 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