Logs under /var/stm/logs/os in HPUX

Ever wondered why /var/stm/logs/osis taking up huge space in /varmount point of HPUX? In this post, we will see details about logs under this directory and how to handle them.

Most of the time you get /vargetting full alerts from your monitoring system or you observe /varis filling up. This is normal behavior since most of the logs reside in /varand if some logs are growing fast they cause /varfilling up fast. As a first troubleshooting step, you need to check huge size files and directories in /var.

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Many times you see one of the culprit is /var/stm/logs/osdirectory. If you see inside this directory you will see something like below :

There are lots of raw log files taking up huge space collectively.

Your next question will be what are these files? what is the purpose of these files on the server?

These are raw files that are being logged and used by STM i.e. support tool manager. Those are logs collected by STM which has information about your hardware issues. By the above output, you can see those are rotated when one log file crosses a certain file size. While rotating they are sequentially numbered. This numbering makes it easy when it comes to managing those logs.

You can read these logs using log viewer by STM. Goto CSTM consoleusing command cstm–

Then run ruand select logtoolutility.

With give information on console you can view, format raw log files.

Now you know what are these files and you observe there are too many of them which are too old to keep. In such a scenario, you have got two options:

Make a note that those logs are read by STM as well so if you purge or zip them, STM won’t be able to use them.

So be sure you check logs using logtoolutility explained above and decide to purge, zip, or keep it. Normally, if you are not facing any hardware issues with the server currently then you should zip/purge according to the time frame I suggested above.

Match above output with previous and see how file size decreased after zipping which in turns saved my /varspace.

Zipping of purging these logs will greatly free up space under /varmount point. This is one of the directories which we normally miss or ignore while cleaning up the mount point.

Alternatively, you can even configure logrotate utility which will take care of this zipping and purging of files automatically without human intervention.

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