Out of memory - but only 500M out of 4GB in use
Tony van Lingen
tony.vanlingen at epa.qld.gov.au
Tue May 23 20:51:40 CDT 2006
I thought that memory allocated as 'cache' was (at least in theory)
free? How do I prevent the kernel from allocating it? The program memory
seems to use only 500M..
There's 2GB swap, virtually all of which is free.
Mem: 4147196k total, 3058100k used, 1089096k free, 15784k buffers
Swap: 2096472k total, 43060k used, 2053412k free, 2521072k cached
3GB memory is used, but 2.5GB of that is cache...
David Hubbard wrote:
>What's the value of your /proc/sys/vm/overcommit_memory
>With only 50 MB of free memory though, that's cutting
>it close. How much swap do you have?
>>From: linux-poweredge-bounces at dell.com
>>[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Tony van Lingen
>>Sent: Tuesday, May 23, 2006 8:35 PM
>>Subject: Out of memory - but only 500M out of 4GB in use
>>I'm trying to run various OC4J (oracle java servers) as well
>>as a couple of Oracle App servers (OAS) on the same box. It
>>has 4GB RAM in it, 3.5 GB of which is allocated to cache when
>>3 OAS instances and 1 OC4J instance are running. There's 50M
>>unallocated memory. When I try to start another OC4J (java
>>-jar oc4j.jar) it goes and allocated the remaining 50M abd
>>then reports 'Out of Memory' and apparently hangs.
>>Anyone knows how to get around this? It also seems to confuse
>>the oom-kiler which goes and kills parts of the OAS (the
>>webcache daemon - not good) when the system has "only" 2GB
>>allocated to cache...
>>The box is a PE2850, 4GB RAM, 2CPU, RHEL 4 kernel 2.6.9-34 ELsmp.
>>Tony van Lingen
>>Tech One Contractor
>>Corporate Development Division
>>Environmental Protection Agency
>>Ph: (07) 3234 1972
>>Fax: (07) 3227 6534
>>Mobile: 0413 701 284
>>E-mail: tony.vanlingen at epa.qld.gov.au
>>Visit us online at www.epa.qld.gov.au
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Tony van Lingen
Tech One Contractor
Corporate Development Division
Environmental Protection Agency
Ph: (07) 3234 1972
Fax: (07) 3227 6534
Mobile: 0413 701 284
E-mail: tony.vanlingen at epa.qld.gov.au
Visit us online at www.epa.qld.gov.au
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