Re: [Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-09 Thread Per Jessen
On Mon, 6 Dec 2004 17:37:30 -0500, Sonny Rao wrote: >Right, so there's really only one thing i can think of and it's not >much of a solution. You can change the memory split so that you can >use all 2gb for kernel memory. I know there are some patches floating >around to convert the 1GB to a 2GB

Re: [Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-06 Thread Sonny Rao
On Mon, Dec 06, 2004 at 07:01:36PM +0100, Per Jessen wrote: > On Mon, 6 Dec 2004 11:14:03 -0500, Sonny Rao wrote: > > >Yes, this is a consequence of the way memory is partitioned on IA32 > >machines (which I'm assuming you're using). > > Correct - Intel Xeons. > > >If you look at the amount o

Re: [Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-06 Thread Dave Kleikamp
On Mon, 2004-12-06 at 19:01 +0100, Per Jessen wrote: > OK, I can tell inode_cache is using up a lot here. Apart from using > a multi-level subdir structure for my 500.000 files, is there anything > else I can tweak to assist the process? find is going to bring all of the inodes into memory reg

Re: [Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-06 Thread Per Jessen
On Mon, 6 Dec 2004 11:14:03 -0500, Sonny Rao wrote: >Yes, this is a consequence of the way memory is partitioned on IA32 >machines (which I'm assuming you're using). Correct - Intel Xeons. >If you look at the amount of memory being used by the kernel slab cache, >I'd bet it's using much of t

Re: [Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-06 Thread Sonny Rao
On Sun, Dec 05, 2004 at 08:41:35PM +0100, Per Jessen wrote: > On Sun, 05 Dec 2004 18:40:58 +0100, Per Jessen wrote: > > >I do a find in a directory that contains 5-600,000 files - which just > >about makes the box grind to a halt. The machine is not heavily loaded as > >such, > >but does write

Re: [Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-05 Thread Per Jessen
On Sun, 05 Dec 2004 18:40:58 +0100, Per Jessen wrote: >I do a find in a directory that contains 5-600,000 files - which just >about makes the box grind to a halt. The machine is not heavily loaded as >such, >but does write 2 new files/sec to the same filesystem. Or tries to. I need to add -

[Jfs-discussion] performance probs - 2.4.28, jsf117, raid5

2004-12-05 Thread Per Jessen
Hi, I'm not certain JFS is the culprit here, but at least it's a suspect :-) I have a 150Gb filesystem on software RAID5 with JFS117, kernel 2.4.28. The box is a 4way 500MHz Xeon with 2Gb. I do a find in a directory that contains 5-600,000 files - which just about makes the box grind to a halt