i need to save my memory since, i run many application on my server like mysql, apache server and other, physical memory drop fasterit just not comfortable to have memory under 100 MB. do you have any suggestion to manage this ? and restore back memory to average rate above 100 MB.
Save for restarting the processes, you aren't going to reclaim their memory by any means. If you're concerned about the space being used by buffers/cache, you shouldn't be:
https://listman.redhat.com/archives/redhat-list/2003-June/msg00572.html
If you clear that memory (and it's not hard to do), you'll actually make the performance of the machine worse. It'll have to read all of those cached files off the hard drive again, rather than getting them from memory.
You should be looking at the second line of output from 'free'. That will give you the best idea of what memory is "used" and "free". The first line is accurate, but misleading if you don't understand the purpose of buffers/cache.
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