Messages in this thread Patch in this message | | | From | Anders Saaby <> | Subject | Re: oom-killer 2.6.8.1 | Date | Tue, 24 Aug 2004 11:30:15 +0200 |
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OK - I now have some additional info regarding the slapinfo/oom-killer issue.
As I wrote earlier this server is a storage server providing NFS storage to a number of webservers - ondisk filesystem is xfs, kernel = 2.6.8.1. At 03:00 some logrotate scripts runs throug a lot of files. It appears that this is what is using the slabs (see this graph, K = M, so max used slab is approx. 700M)
http://saaby.com/slabused.gif (values are from /proc/meminfo)
These are the values (from slabinfo, active_objs), which changed remarkably from 03:00 to 06:00:
03:00: 06:00: xfs_chashlist 91297 xfs_chashlist 151994 xfs_inode 243791 xfs_inode 586780 linvfs_icache 243791 linvfs_icache 586807 dentry_cache 196033 dentry_cache 430609
The server crashed every night at approx. 03:00 to 04:00 - until last night where we changed:
vm.min_free_kbytes from default (approx. 900K) to vm.min_free_kbytes=32768 (32M)
This seems to solve the problem - Does this make any sense to you? - Or just pure luck?
/Saaby
On Wednesday 18 August 2004 23:11, William Lee Irwin III wrote: > On Wednesday 18 August 2004 16:05, William Lee Irwin III wrote: > >> Index: oom-2.6.8-rc1/mm/vmscan.c > >> =================================================================== > >> --- oom-2.6.8-rc1.orig/mm/vmscan.c 2004-07-14 06:17:13.876343912 -0700 > >> +++ oom-2.6.8-rc1/mm/vmscan.c 2004-07-14 06:22:15.986416200 -0700 > >> @@ -417,7 +417,8 @@ > >> goto keep_locked; > >> if (!may_enter_fs) > >> goto keep_locked; > >> - if (laptop_mode && !sc->may_writepage) > >> + if (laptop_mode && !sc->may_writepage && > >> + !PageSwapCache(page)) > >> goto keep_locked; > >> > >> /* Page is dirty, try to write it out here */ > > On Wed, Aug 18, 2004 at 04:24:24PM +0200, Anders Saaby wrote: > > laptop_mode is not set on this server <- :-) > > - So I guess this is not relevant for my setup? > > Probably not. Please try to collect /proc/slabinfo snapshots while the > system is still functional as it degrades. > > > -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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