High System memory utilization

[Filosofo]

Hello,
the last day I have a memory utilization of 5Gb on a total of 10 Gb...
Today, I control and I see the memory utilization is 8GB and we no start processes or daemon. The different is that last day system memory was 3 Gb and now 6 Gb.
I use glance and top to verify particula process that use memory...but I not found.
I hope that you can help me to understand what happen.

Thanks filo

[G. Vrijhoeven]

Hi,

If you have glance you can select memory monitoring. This should give you a better insight.

Gideon

[Tim Sanko]

Filo,

I bet you have what is known as a memory leak. Software that is written by many people seem to ignore the fact that they can free memory as well as allocate it.

There are many commercial programs that tend to grow like this. In C the command malloc, calloc, should have an associated free with the release of the memory. Also the system caching can start growing if you have your system cache min-max at say 5-50% that is not unreasonable for some situations.
(I am particularly thinking of some least cost matrix solves, so other admins please don't harp on a 5% min and max.) You need to evaluate your own system, and it's tunables.


You may need more help than top can bring. Gpm may help, but you may have large active ftp's etc. Process lists, glance, and other tools can help. You may have a tuning issue.

Hope that is some help.

Tim

[Steven E. Protter]

A little performance data collection sounds in order.

If you don't want to do glance, try this script(attached).

SEP