I think I found my problem. I did not realize using /dev/shm as a ramdisk will create swap space. Is there a way to prevent the ramdisk from swapping to disk?
On 07/20/2011 07:09 PM, Michael McNulty wrote:
I think I found my problem. I did not realize using /dev/shm as a ramdisk will create swap space. Is there a way to prevent the ramdisk from swapping to disk?
Perhaps by not storing so much stuff in it? That, or adding more RAM. Seriously, if you're going to fill up a large portion of your available memory with a ramdisk, demands for memory are going to have to be met by pushing pages out to swap space. By default, a ramdisk can grow to up to half of the available RAM after the kernel has been loaded. If programs and I/O buffers need more than the other memory you have available, what option is there besides swap?
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Robert Nichols Sent: Thursday, July 21, 2011 14:32 To: centos@centos.org Subject: Re: [CentOS]Memory Usage in Top and System Monitor?
On 07/20/2011 07:09 PM, Michael McNulty wrote:
I think I found my problem. I did not realize using /dev/shm as a
ramdisk will
create swap space. Is there a way to prevent the ramdisk from
swapping to disk?
<SNIP>
If programs and I/O buffers need more than the other memory you have available, what option is there besides swap?
"what option is there besides swap [to disk]?"
Compcache, Compressed Caching for Linux?
But last I read, it needed a newer kernel than was in 5.x. So no I have not tried it. :)
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Denniston, Todd A CIV NAVSURFWARCENDIV Crane -
Michael McNulty -
Robert Nichols