I have some weird behavior I can't explain... I've noticed this behavior since CentOS 5.2 (version I started running) through 5.4...
I am running a Xen host/VM. On my guest VM, I use Alpine as my email client and Aspell as the spell-check... For whatever reason, when Aspell is kicked off - there appears to be what I'd call a prolonged pause before Aspell does its job. Should I run Alpine on bare metal (even on the host OS) - there is no pause whatsoever.
The pause is so bad, I've stopped using Alpine in the VM and just running on the host OS itself.
Its really not a big deal, but I can't figure out what or why there is a difference. Initially I thought it might be an issue with the amount of RAM I give the guest OS - I've tried from 256 MB to 768 MB - the pause is the same :(
Any help or anything I can look at to figure this out - is greatly appreciated!
Thanks ahead of time!
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
On Fri, Nov 06, 2009 at 08:39:06AM -0500, Scot P. Floess wrote:
I have some weird behavior I can't explain... I've noticed this behavior since CentOS 5.2 (version I started running) through 5.4...
I am running a Xen host/VM. On my guest VM, I use Alpine as my email client and Aspell as the spell-check... For whatever reason, when Aspell is kicked off - there appears to be what I'd call a prolonged pause before Aspell does its job. Should I run Alpine on bare metal (even on the host OS) - there is no pause whatsoever.
The pause is so bad, I've stopped using Alpine in the VM and just running on the host OS itself.
Its really not a big deal, but I can't figure out what or why there is a difference. Initially I thought it might be an issue with the amount of RAM I give the guest OS - I've tried from 256 MB to 768 MB - the pause is the same :(
Any help or anything I can look at to figure this out - is greatly appreciated!
What kind of pause is that? How long?
Do you have DNS properly configured in the guest? Does network function at full speed from the guest?
Any errors in the logs on the guest? how about dom0?
-- Pasi
Answers inline below...
On Fri, Nov 06, 2009 at 08:39:06AM -0500, Scot P. Floess wrote:
I have some weird behavior I can't explain... I've noticed this behavior since CentOS 5.2 (version I started running) through 5.4...
I am running a Xen host/VM. On my guest VM, I use Alpine as my email client and Aspell as the spell-check... For whatever reason, when Aspell is kicked off - there appears to be what I'd call a prolonged pause before Aspell does its job. Should I run Alpine on bare metal (even on the host OS) - there is no pause whatsoever.
The pause is so bad, I've stopped using Alpine in the VM and just running on the host OS itself.
Its really not a big deal, but I can't figure out what or why there is a difference. Initially I thought it might be an issue with the amount of RAM I give the guest OS - I've tried from 256 MB to 768 MB - the pause is the same :(
Any help or anything I can look at to figure this out - is greatly appreciated!
What kind of pause is that? How long?
So, I can see aspell kicking off...and nothing...for a good 30 - 60 seconds anyway...
Do you have DNS properly configured in the guest? Does network function at full speed from the guest?
Yep, DNS works fine...if I run bare metal - no issues. Oddly enough Fedora 9 xen guest runs it fine too..
Any errors in the logs on the guest? how about dom0?
Nope, nothing in the logs on the guest nor dom0...
-- Pasi
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
On Mon, Nov 09, 2009 at 09:11:05AM -0500, Scot P. Floess wrote:
Answers inline below...
On Fri, Nov 06, 2009 at 08:39:06AM -0500, Scot P. Floess wrote:
I have some weird behavior I can't explain... I've noticed this behavior since CentOS 5.2 (version I started running) through 5.4...
I am running a Xen host/VM. On my guest VM, I use Alpine as my email client and Aspell as the spell-check... For whatever reason, when Aspell is kicked off - there appears to be what I'd call a prolonged pause before Aspell does its job. Should I run Alpine on bare metal (even on the host OS) - there is no pause whatsoever.
The pause is so bad, I've stopped using Alpine in the VM and just running on the host OS itself.
Its really not a big deal, but I can't figure out what or why there is a difference. Initially I thought it might be an issue with the amount of RAM I give the guest OS - I've tried from 256 MB to 768 MB - the pause is the same :(
Any help or anything I can look at to figure this out - is greatly appreciated!
What kind of pause is that? How long?
So, I can see aspell kicking off...and nothing...for a good 30 - 60 seconds anyway...
Does aspell work from the cmdline?
Do you have DNS properly configured in the guest? Does network function at full speed from the guest?
Yep, DNS works fine...if I run bare metal - no issues. Oddly enough Fedora 9 xen guest runs it fine too..
So is it aspell version dependant?
Any errors in the logs on the guest? how about dom0?
Nope, nothing in the logs on the guest nor dom0...
Weird..
-- Pasi
Does aspell work from the cmdline?
I just verified - yes from the cmdline everything is fine...
So is it aspell version dependant?
That's a good question - not really sure... I'm not sure what version of aspell/alpine I was using under Fedora 9 xen guest... I've somewhat dropped Fedora 9 from my home network :(
Weird..
Yeah for sure...
-- Pasi
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
Actually, I was wrong... For root from the command line - it all works fine. Running as myself - it pauses for a good 20 seconds.
I thought maybe it was NFS related, so I created a local directory owned by me and ran aspell from the command line - pause was the same...
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Does aspell work from the cmdline?
I just verified - yes from the cmdline everything is fine...
So is it aspell version dependant?
That's a good question - not really sure... I'm not sure what version of aspell/alpine I was using under Fedora 9 xen guest... I've somewhat dropped Fedora 9 from my home network :(
Weird..
Yeah for sure...
-- Pasi
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
Even more interesting - I just created a local user specific to the VM... aspell works just fine...
I'm wondering if this is an NFS/NIS related thing... Very wierd indeed...
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Actually, I was wrong... For root from the command line - it all works fine. Running as myself - it pauses for a good 20 seconds.
I thought maybe it was NFS related, so I created a local directory owned by me and ran aspell from the command line - pause was the same...
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Does aspell work from the cmdline?
I just verified - yes from the cmdline everything is fine...
So is it aspell version dependant?
That's a good question - not really sure... I'm not sure what version of aspell/alpine I was using under Fedora 9 xen guest... I've somewhat dropped Fedora 9 from my home network :(
Weird..
Yeah for sure...
-- Pasi
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
On Mon, Nov 09, 2009 at 11:28:14AM -0500, Scot P. Floess wrote:
Even more interesting - I just created a local user specific to the VM... aspell works just fine...
I'm wondering if this is an NFS/NIS related thing... Very wierd indeed...
try "strace alpine" to see what it's using..
btw. are you using nfs over udp or tcp? If over udp, try over tcp.
-- Pasi
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Actually, I was wrong... For root from the command line - it all works fine. Running as myself - it pauses for a good 20 seconds.
I thought maybe it was NFS related, so I created a local directory owned by me and ran aspell from the command line - pause was the same...
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Does aspell work from the cmdline?
I just verified - yes from the cmdline everything is fine...
So is it aspell version dependant?
That's a good question - not really sure... I'm not sure what version of aspell/alpine I was using under Fedora 9 xen guest... I've somewhat dropped Fedora 9 from my home network :(
Weird..
Yeah for sure...
-- Pasi
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
OK, I feel like a complete idiot...
I was not running nfslock... I started it, and the problem went away. The user (me being the user) had an NFS mounted home directory...
No idea why this worked under Fedora 9 - I may have started nfslock on that VM...
Thanks all for the help!
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Actually, I was wrong... For root from the command line - it all works fine. Running as myself - it pauses for a good 20 seconds.
I thought maybe it was NFS related, so I created a local directory owned by me and ran aspell from the command line - pause was the same...
On Mon, 9 Nov 2009, Scot P. Floess wrote:
Does aspell work from the cmdline?
I just verified - yes from the cmdline everything is fine...
So is it aspell version dependant?
That's a good question - not really sure... I'm not sure what version of aspell/alpine I was using under Fedora 9 xen guest... I've somewhat dropped Fedora 9 from my home network :(
Weird..
Yeah for sure...
-- Pasi
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Scot P. Floess 27 Lake Royale Louisburg, NC 27549
252-478-8087 (Home) 919-890-8117 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim
Architect Keros http://sourceforge.net/projects/keros
On Mon, Nov 09, 2009 at 11:53:49AM -0500, Scot P. Floess wrote:
OK, I feel like a complete idiot...
I was not running nfslock... I started it, and the problem went away. The user (me being the user) had an NFS mounted home directory...
No idea why this worked under Fedora 9 - I may have started nfslock on that VM...
Thanks all for the help!
Heh.. good that it works now :)
-- Pasi
-
Pasi Kärkkäinen -
Scot P. Floess