Re: [Zope] Zope memory usage / cache
On Tuesday 30 January 2001 21:21, Ron Bickers wrote: > > -Original Message- > > From: ender [mailto:[EMAIL PROTECTED]] > > Sent: Tuesday, January 30, 2001 10:12 AM > > To: Ron Bickers; [EMAIL PROTECTED] > > Subject: Re: [Zope] Zope memory usage / cache > > > > this sounds like normal operating system behavior. memory isn't > > being free'd > > just dealloc and returned to the program heap and marked as available. > > Ok. So you're saying that even though it says it's taking 50MB, much of > that memory is probably available for other applications? warning: i'm on shaky ground here. this is very os dependent. most os's don't resize a process's heap down on a dealloc. instead the heap has more available memory for that process (ie Zope), other processes will have to alloc from free memory. the management of free heap space and disk caching is again os dependent, but a good os should try to do some optimization of heaps before thrashing, so starting a new process should cause a problem. >Does this mean > that if another application actually starts to use that memory that the > Zope process should start showing a reduction in use? no. > How can I (if I can) > see how much is really available? i'm not sure how you would do this on linux. >Also, does the free memory below not > necessarily reflect the amount of memory that is actually available for > applications that may need it? no it does not (again os dependent). free memory is indicator of the os free resources for new and current processes. for existing processes it is a indicator not a def. answer. > total used free sharedbuffers cached > Mem:126312 122936 3376 48424 5820 29952 > -/+ buffers/cache: 87164 39148 > Swap: 530104 21876 508228 > > Sorry if this is inappropriate for the Zope list. I have only *noticed* > this behavior with Zope, but that may not mean anything. if you're on linux trying starting up a large app (gimp comes to mind as a good one) and loading and unloading some large docs, and watch what happens kapil ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope memory usage / cache
On Tuesday 30 January 2001 10:09, Ron Bickers wrote: > I have a site that has dozens of 300k+ Photo objects > (http://www.zope.org/Members/Drew/Photo). When I start Zope, it uses about > 10MB. It will run at around 10-12MB for days as long as I don't access any > of the photos. Once I access several of the photos, it jumps up to around > 50MB. The debug info says there are over 200 Photo object references. > > If I then do a Cache minimize, there are no longer any Photo object > references, but the memory usage remains 50MB. It will stay that high > indefinitely (at least as long as I have tested -- a few days), even if the > site isn't accessed. If I restart, it goes back down to 10MB, and it will > stay there as long as my photos aren't accessed. > > Is this normal behavior? It seems crazy to have Zope sucking up that much > memory when those photos are hardly ever accessed. this sounds like normal operating system behavior. memory isn't being free'd just dealloc and returned to the program heap and marked as available. kapil ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] Zope memory usage / cache
I have a site that has dozens of 300k+ Photo objects (http://www.zope.org/Members/Drew/Photo). When I start Zope, it uses about 10MB. It will run at around 10-12MB for days as long as I don't access any of the photos. Once I access several of the photos, it jumps up to around 50MB. The debug info says there are over 200 Photo object references. If I then do a Cache minimize, there are no longer any Photo object references, but the memory usage remains 50MB. It will stay that high indefinitely (at least as long as I have tested -- a few days), even if the site isn't accessed. If I restart, it goes back down to 10MB, and it will stay there as long as my photos aren't accessed. Is this normal behavior? It seems crazy to have Zope sucking up that much memory when those photos are hardly ever accessed. ___ Ron Bickers Logic Etc, Inc. [EMAIL PROTECTED] ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
