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How to show the process list in MySQL?
The SHOW PROCESSLIST command returns all currently running threads. You then can terminate the idle threads with the KILL statement. The following shows the syntax of the SHOW PROCESSLIST command: SHOW [ FULL] PROCESSLIST ;
Is there an alternative to show processlist in MySQL?
As of MySQL 8.0.22, an alternative implementation for SHOW PROCESSLIST is available based on the Performance Schema processlist table, which, unlike the default SHOW PROCESSLIST implementation, does not require a mutex and has better performance characteristics. For details, see Section 27.12.21.5, “The processlist Table” .
How to see full query from show processlist?
When using phpMyAdmin, you should also click on the “Full texts” option (“← T →” on top left corner of a results table) to see untruncated results. Show Processlist fetches the information from another table. Here is how you can pull the data and look at ‘INFO’ column which contains the whole query :
What is the syntax of the show processlist command?
The following shows the syntax of the SHOW PROCESSLIST command: Accounts with the PROCESS privilege can view all threads. Otherwise, they can view only threads associated with their accounts.
Why is MySQL show processlist sleep under command?
I would like to know the process “Sleep” that is under Command. What does it mean? Why it is running since a long time and showing NULL? It is making the database slow and when I kill the process, then it works normally. Please help me. It’s not a query waiting for connection; it’s a connection pointer waiting for the timeout to terminate.
How to reclaim disk space in MySQL database?
This might re-pack the rows, fitting more rows into each page if you’ve changed values to NULL. It would be more effective to DELETE rows you don’t need, and then OPTIMIZE TABLE. This will eliminate whole pages, instead of leaving them fragmented.
How much free disk space does MySQL have?
EDIT 1 : I deleted 90% of rows from table then I ran OPTIMIZE TABLE table_name but it has reduced only 4GB of disk space and it is not reclaiming the free disk space. EDIT 2 I even deleted my database and created new DB and table but MySql server still showing 80GB disk space.
How to check MySQL disk usage on Linux?
Assuming that your MySQL host is running on Linux. Once you know where the data is stored, you can check disk usage with du command. For example on Ubuntu sudo du -h /var/lib/mysql. Thanks for contributing an answer to Database Administrators Stack Exchange!
How to kill all processes in MySQL database?
STEP 2: Call the stored procedure giving it the name of a database user whose processes you want to kill. You could rewrite the stored procedure to filter on some other criteria if you like.
How to find process list and to kill those processes?
Select the process id and run a command KILL ; to kill that process. Sometimes it is not enough to kill each process manually. So, for that we’ve to go with some trick: Run a query Select concat (‘KILL ‘,id,’;’) from information_schema.processlist where user=’user’; to print all processes with KILL command;
How to show which threads are running in MySQL?
SHOW PROCESSLIST shows which threads are running. If you have the PROCESS privilege, you can see all threads. Otherwise, you can see only your own threads (that is, threads associated with the MySQL account that you are using). If you do not use the FULL keyword, only the first 100 characters…