similar to: increasing ext3 or io responsiveness

I'm lacking some understanding of how to tune / when to tune /proc/sys/vm/bdflush Where can I read up on this? Our current problem: Load is low, but ever so often the system decides to do some serious disk I/O which causes all processes to wait for disk I/O -- load explodes (rises linear up into the 20-30ies) just to fall linearly (spelling?) right after that. We think there might be some

Hi, I'd like to use a flash drive as a journal device, with the purpose of keeping the main disk drive spun down as long as possible. I have a couple of questions: 1) Does the journaling code spread write accesses to the journal device evenly, as I hope, or are there blocks that are particularly "hot"? I.e., do I have to worry about the flash device dying quickly because of

Can anyone explain how the disk elevator works and if there is anyway to tweak it? I have an email server which likely has a large number of read and write requests and was wandering if there was anyway to improve performance. Matt

I'm having load problems on a server. The bottleneck appears to be disk IO. iostat would show ~100, under %util, during peak usage. i'm running things like clam antivirus, pop, exim, apache, mysql on the server. is there a way to check which process and which file is taking up disk IO? or see what is being written to the disk? i'm very puzzled as the amount of writes is 10 times

Hello. I'm looking for assistance or pointers for the following problem. OS: RHAS2.1 enterprise16 HW: HP proliant 2CPU 6GB RAM, internal RAID1 + RAID5(4 x 10K 72GB) When we run any kind of process (especially tar for some reason) that creates heavy disk activity the machine becomes Very Slow, (e.g. takes 30-45 seconds to get a reply from ls at the console, or a minute to log in.) I

Greetings all, I have a question regarding the fsync data corruption bug that was introduced in 2.4.20 when using data=journal. I have patched the 2.4.20 kernel with the 3 sync patches available from zip.com.au, and I am wondering if with these patches the "bug" still exists: sync_fs.patch sync_fs-fix.patch sync_fs-fix-2.patch In addition the following two patches have also

(Sent to linux-raid, linux-kernel and ext3-users since I'm not sure what type of issue this is) I've got a test system here running Redhat 7.1 + stock 2.4.9 with these patches: http://www.fys.uio.no/~trondmy/src/2.4.9/linux-2.4.9-NFS_ALL.dif http://www.zip.com.au/~akpm/ext3-2.4-0.9.6-249.gz http://domsch.com/linux/aacraid/linux-2.4.9-aacraid-20010816.patch All three patches applied

Sysctl Values ------------------------------------------- net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.tcp_window_scaling = 1 # vm.max-readahead = ? # vm.min-readahead = ? # HW Controler Off # max-readahead = 1024 # min-readahead = 256 # Memory over-commit # vm.overcommit_memory=2 # Memory to

Well.... you might remember that I have had problems will my NFS fileserver that run ext3 with data=journal. The filesystem corruption now seems too be solved with the patch (plus amendment) that I posted, so I am happy about that... but there is more. I have known for a while that ext3 doesn't behave very well when the journal fills up. If it finds that the journal is full, and the

I apologize if this is off-topic, because I'm not sure if /proc/sys/vm/bdflush has anything to do with ext3 performance or not. However, I've been searching around for a while and can't find the answer I need. If somebody could shed some light, I'd really appreciate it. In "Securing and Optimizing Linux: RedHat Edition -A Hands on Guide", the author gives these values to

Dear Sir, I am facing the same problem you were discussing here: https://www.redhat.com/archives/libvirt-users/2015-January/msg00070.html I am getting this error: Starting install... ERROR internal error: unable to execute QEMU command 'qom-list': The command qom-list has not been found Domain installation does not appear to have been successful. If it was, you can restart your domain

Hi I was wondering if you ever got better performance out of your Gigabit/IDE/Fc2? I am facing a similar situation. I am running FC2 with Samba 3.x My problem lies in not that I am limited to 10 MBytes per second sustained. I think it's related to this pdflush and how it's buffers are setup. (I have been doing some research and before 2.6 kernels bdflush was the method that was used and

Get this warning on bootup ext3 file checks on 2.6.* kernels. Apparently harmless, but how do I fix this? _______________________________________________ debian-knoppix mailing list debian-knoppix at linuxtag.org http://mailman.linuxtag.org/mailman/listinfo/debian-knoppix

Hi all, We are observing a consistent interval of about 4 minutes at which there are large sustained writes to disk that causes mysqld to block and not respond for the entire period. We are using data=journal with a 128M journal and the filesystem is 150GB in size. We get about 300kb/sec in writes and that will jump to about 2000kb/sec during the periods of large sustained writes. Those

Maybe I should've started a new thread with this question (it was in the /proc/sys/vm/bdflush thread), so I am now :) According to tests performed for this article: http://www-106.ibm.com/developerworks/linux/library/l-fs8/ "ext3's data=journal mode is incredibly well-suited to situations where data needs to be read from and written to disk at the same time." This is the

Hi, This morning I had some failed calls. On the console (and in the log) I saw the error "Unable to allocate channel structure". Before I restarted the process, I checked it's memory usage in ps and glanced at my free memory in top. Asterisk was using a normal ammount of memory, about 40M. I don't think this was a system limit. This was running Asterisk v1.0.2. Below is

On Tue, Jun 23, 2015 at 03:41:45PM +0200, Michal Privoznik wrote: > On 23.06.2015 14:16, Ivo Hora wrote: > > Dear Sir, > > > > I am facing the same problem you were discussing here: > > https://www.redhat.com/archives/libvirt-users/2015-January/msg00070.html > > > > I am getting this error: > > Starting install... > > ERROR internal error:

It seems that the mirrors are now all sync'd with the binary RPMs, but where are the source packages? The source RPMs are available for the few packages updated since the upstream 5.3 release, but the SRPMS for the release itself are missing. Example: http://mirror.centos.org/centos-5/5.3/os/ has directories containing the x86 and x86_64 binaries, but should also have a SRPMS directory.

Hi, I am trying to setup Sieve replication, it is almost working: 1/ Create a script - sync'd across 2/ Activate/de-activate a script - change sync'd 3/ Delete a script - change sync'd But if I make a change to a script it is not replicated, unless I de-activate and activate again. I am seeing in the logs the below during this process (de-activating/activating): Oct? 9

> I have the following problem when cross-building speex 1.1.7 with > MaverickCrunch support. To add this support I had to define CPPFLAGS > as follows: > > export CPPFLAGS='-mcpu=ep9312 -mfix-crunch-d1' You should set CFLAGS instead (or as well). > but it seems libtool does not like it, while the object files are > compiled fine: It's ld that complains,