Gordon Messmer wrote:> On 09/16/2015 09:11 AM, Callum Scott wrote: >> It is running a little >> tight on memory and so there have been a couple of events where the >> OOM_killer has been invoked and killed off MySQL, which you would >> expect. > > One thing that should be noted is that regardless of swappiness, > overcommit might be an issue. If a single process is using most of the > memory in a system, and attempts to fork(), as it will if it calls > system(), then the system may require that there is enough memory for a > second instance of that huge process. > > This is one of the reasons why swap should be as large or larger than > system RAM.<snip> Excerpt on heavy-duty servers. We're certainly not going to allocate hundreds of gigs, or a terabyte or so, for swap. (Yes, we do have servers with that kind of RAM, and that's not counting the small SGI supercomputer....) mark
On Wed, 2015-09-16 at 13:36 -0400, m.roth at 5-cent.us wrote:> Excerpt on heavy-duty servers. We're certainly not going to allocate > hundreds of gigs, or a terabyte or so, for swap. (Yes, we do have servers > with that kind of RAM, and that's not counting the small SGI > supercomputer....)Do you really run Centos on the SGI ? -- Regards, Paul. England, EU. England's place is in the European Union.
----- Original Message ----- | | On Wed, 2015-09-16 at 13:36 -0400, m.roth at 5-cent.us wrote: | | > Excerpt on heavy-duty servers. We're certainly not going to allocate | > hundreds of gigs, or a terabyte or so, for swap. (Yes, we do have servers | > with that kind of RAM, and that's not counting the small SGI | > supercomputer....) | | Do you really run Centos on the SGI ? | | | -- | Regards, | | Paul. | England, EU. England's place is in the European Union. I ran CentOS on SGI for years. Worked pretty well. Also helped that I worked for SGI prior to that. -- James A. Peltier IT Services - Research Computing Group Simon Fraser University - Burnaby Campus Phone : 604-365-6432 Fax : 778-782-3045 E-Mail : jpeltier at sfu.ca Website : http://www.sfu.ca/itservices Twitter : @sfu_rcg Powering Engagement Through Technology
Always Learning wrote:> > On Wed, 2015-09-16 at 13:36 -0400, m.roth at 5-cent.us wrote: > >> Excerpt on heavy-duty servers. We're certainly not going to allocate >> hundreds of gigs, or a terabyte or so, for swap. (Yes, we do have >> servers >> with that kind of RAM, and that's not counting the small SGI >> supercomputer....) > > Do you really run Centos on the SGI ? >Actually, under warranty, we run RHEL 6. mark