Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

how to customize `show processlist` in mysql?

Newer versions of SQL support the process list in information_schema:

SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST

You can ORDER BY in any way you like.

The INFORMATION_SCHEMA.PROCESSLIST table was added in MySQL 5.1.7. You can find out which version you're using with:

SELECT VERSION()

The command

show full processlist

can be replaced by:

SELECT * FROM information_schema.processlist

but if you go with the latter version you can add WHERE clause to it:

SELECT * FROM information_schema.processlist WHERE `INFO` LIKE 'SELECT %';

For more information visit this


Another useful tool for this from the command line interface, is the pager command.

eg

pager grep -v Sleep | more; show full processlist;

Then you can page through the results.

You can also look for certain users, IPs or queries with grep or sed in this way.

The pager command is persistent per session.


You can just capture the output and pass it through a filter, something like:

mysql show processlist
    | grep -v '^\+\-\-'
    | grep -v '^| Id'
    | sort -n -k12

The two greps strip out the header and trailer lines (others may be needed if there are other lines not containing useful information) and the sort is done based on the numeric field number 12 (I think that's right).

This one works for your immediate output:

mysql show processlist
    | grep -v '^\+\-\-'
    | grep -v '^| Id'
    | grep -v  '^[0-9][0-9]* rows in set '
    | grep -v '^ '
    | sort -n -k12