[Orca-users] Where did the memory go....

[Dave Lowenstein]

Is there a noticeable performance slowdown at the point that your
available memory goes low?




Dave Lowenstein
Programmer/Analyst
Instructional Technology Services
San Diego State University
(619)594-0270
http://www-rohan.sdsu.edu/dept/its

On Wed, 5 Feb 2003, Jon A. Tankersley wrote:

> 
> I've been trying to run down 'where did the memory go' on a 2.6 system.
> Free Memory is rapidly getting exhausted (about a Gig a day) and not
> coming back without a reboot.  When it is almost zero there is no
> appreciable paging or swapping.  We're suspecting FS cache (Lots of file
> I/O, logging of transactions, etc. on the system).  But I can't seem to
> find anything in the orcallator/percol file that shows a corresponding
> increase.
> 
> SEToolkit/orcallator are running, apparently fine.
> 
> Another thing I've noticed that one of the orca graphs is using the following:
> data                    pp_kernel
> data                    free_pages
> data                    pagestotl - pp_kernel - free_pages
> data                    pagestotl
> 
> Why isn't it using pagesfree?  On the system I'm working with is showing
> pagesio of 0, and free_pages less than half of pagesfree....
> 
> Is FS cache contained in pagesfree and not free_pages?  The free_pages
> agrees with sar -r data report on freemem pretty closely.
> 
> 
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