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. 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 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. New Topic. Any help would be appreciated, thanks. I've looked at other answers on here and all of them take a very long time as well. (google sheets in your case). Rick James. 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. Advanced Search. To use it, open the my.cnf file and set the slow_query_log variable to "On." 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. Keep in mind, the lower your long_query_time directive the faster the slow query log fills up a disk partition PBI has power query and power pivot as modelling tools. Advanced Search. Navigate: Previous Message• Next Message. Re: A simple update query taking long time. Set long_query_time to the number of seconds that a query should take to be considered slow, say 0.2. MySQL Forums Forum List » Newbie. Posted by: Rick James ... A simple update query taking long time. MySQL has a built-in slow query log. In addition the PHP max_execution_time does not apply to waiting for network calls as shown in this previous blog post on max_execution_time. December 04, 2013 11:55PM Re: A simple update query taking long time. Re: A simple update query taking long time. Unlike excel version, you cannot bring data directly in Power Pivot, so you have a query from a website. New Topic. If the refresh time is slow, then the query is slow. MySQL Forums Forum List » Newbie. Set slow_query_log_file to the path where you want to save the file. 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: Re: A simple update query taking long time. Muntaquim Bagadia. This is an Innodb table. New Topic. MySQL delete is very slow and takes long time! If this variable is not set, it will use the DATA_DIR of your MySQL data directory.. SQL update satement taking a very long time / high disk usage for hours. The refresh time is strictly related to what your query does, and the measures you wrote. 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. Options: Reply• … Fyi, the table is InnoDB and has 14000 rows. 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. The slow query log can be used to find queries that take a long time to execute … Navigate: Previous Message• Next Message. 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. You must ensure that the variable slow_query_log is set to ON, while the slow_query_log_file determines the path where you need to place your slow query logs. Advanced Search. Use timeouts to prevent long-running SELECT queries from taking down your MySQL. , then the query is slow use it, open the my.cnf and. Sql update satement taking a very long time pbi has power query and pivot... Use the DATA_DIR of your MySQL data directory update query taking long time mysql from a website MySQL a... Variable to `` on. use the DATA_DIR of your MySQL data directory answers here... Pivot, so you have a query should take to be considered slow, then query... 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