Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-12 Thread Scooter Morris
Steve, Thanks for the informative, and detailed response -- it really helps to understand what might be happening. We're not mounting with noatime, and it sounds like that would be a good first step. Thanks! -- scooter Steven Whitehouse wrote: Hi, On Fri, 2009-10-09 at 10:57 -0700, Sc

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-12 Thread Kaloyan Kovachev
On Mon, 12 Oct 2009 11:14:08 +0100, Steven Whitehouse wrote > Hi, > > On Mon, 2009-10-12 at 13:07 +0300, Kaloyan Kovachev wrote: > > Hi, > > > > On Fri, 09 Oct 2009 18:01:36 +0100, Steven Whitehouse wrote > > > Hi, > > > > > > The idea is that is should be self-tuning now, adjusting itself to th

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-12 Thread Steven Whitehouse
Hi, On Mon, 2009-10-12 at 13:07 +0300, Kaloyan Kovachev wrote: > Hi, > > On Fri, 09 Oct 2009 18:01:36 +0100, Steven Whitehouse wrote > > Hi, > > > > The idea is that is should be self-tuning now, adjusting itself to the > > conditions prevailing at the time. If there are any remaining > > perfor

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-12 Thread Kaloyan Kovachev
Hi, On Fri, 09 Oct 2009 18:01:36 +0100, Steven Whitehouse wrote > Hi, > > The idea is that is should be self-tuning now, adjusting itself to the > conditions prevailing at the time. If there are any remaining > performance issues though, we'd like to know so that they can be > addressed, > I ha

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-12 Thread Steven Whitehouse
Hi, On Fri, 2009-10-09 at 10:57 -0700, Scooter Morris wrote: > Steve, > Thanks for the prompt reply. Like Kaerka, I'm running on > large-memory servers and decreasing demote_secs from 300 to 20 > resulted in significant performance improvements because locks get > freed much more quickly (I a

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-09 Thread Scooter Morris
Steve, Thanks for the prompt reply. Like Kaerka, I'm running on large-memory servers and decreasing demote_secs from 300 to 20 resulted in significant performance improvements because locks get freed much more quickly (I assume), resulting in much better response. It could certainly be th

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-09 Thread Kaerka Phillips
If in gfs2 glocks are purged based upon memory constraints, what happens if it is run on a box with large amounts of memory? i.e. RHEL5.x with 128gb ram? We ended up having to move away from GFS2 due to serious performance issues with this exact setup, and our performance issues were largely cente

Re: [Linux-cluster] gfs2_tool settune demote_secs

2009-10-09 Thread Steven Whitehouse
Hi, On Fri, 2009-10-09 at 09:55 -0700, Scooter Morris wrote: > Hi all, > On RHEL 5.3/5.4(?) we had changed the value of demote_secs to > significantly improve the performance of our gfs2 filesystem for certain > tasks (notably rm -r on large directories). I recently noticed that > that tun

[Linux-cluster] gfs2_tool settune demote_secs

2009-10-09 Thread Scooter Morris
Hi all, On RHEL 5.3/5.4(?) we had changed the value of demote_secs to significantly improve the performance of our gfs2 filesystem for certain tasks (notably rm -r on large directories). I recently noticed that that tuning value is no longer available (part of a recent update, or part of 5