This program parses the output of 'ps' and throws it into an sqlite3 database with a timestamp. The result is a simple data-capture utility you can use to see the resource usage of any process over the lifetime of that process.
- Set up data collection either as a cronjob running 'psot.py -m' at an interval of your choosing or run in 'daemon' mode where a measurement is taken every X minutes with 'psot.py -d X'.
- Go on with your day.
This is very crude at the moment. Running 'psot.py' with no arguments lists all the processes recorded with 'process_id', 'pid', 'process start time' and the complete command line used to execute the process. Note: process_id is the database ID that 'psot' uses -- not the PID.
Run 'psot.py 123', where '123' is the 'process_id' you're interested in to get a dump of the recorded values. At the moment it's just the raw data -- for the moment you have to handle your own graphing with gnuplot or google visualizations or however you want to see your data.
- By default, only processes that have been running longer than one minute are recorded in the database, this is configurable with the '--ignore=SECONDS' parameter.
- The database is stored in ${HOME}/.psot.sqlite3, this isn't configurable yet.
- The database grows pretty quickly -- a couple megabytes an hour depending on the number of processes you've got. Don't set it running then forget about it for weeks! Later I'll add the ability to purge old data.