Hi all, I'm troubleshooting an ocfs2 performance problem where creating files in a directory containing ~180k files is taking significant time to complete. Sometimes creating an empty file will take >100 seconds to complete. This is a three node cluster. I'm currently running OCFS2 1.2.3-1. Are there any changes in a recent version that may address this issue? What should I look at to troubleshoot? The systems overall utilization is low. (All 3 systems are identical) RHEL 4 update 4 - 2.6.9-42.0.2.ELhugemem (32-bit) ocfs2-2.6.9-42.0.2.ELhugemem-1.2.3-1 ocfs2-tools-1.2.2-1 HP Proliant DL385 - 2 X 2.4 GHz AMD Opteron Processor 250 16GB RAM 2 X emulex LP10000 HBAs Powerpath 4.5.1 shared disks are from an EMC clariion CX500 Thanks, Matt -------------- next part -------------- An HTML attachment was scrubbed... URL: http://oss.oracle.com/pipermail/ocfs2-users/attachments/20070521/c868d69c/attachment.html
1. Upgrade to atleast 1.2.4 if not 1.2.5. We fixed a lowmem issue in 1.2.4 that reduces the fs' memory footprint. 2. strace -tt -T the process. That will narrow down the problem area. Matthew Flusche wrote:> Hi all, > > I'm troubleshooting an ocfs2 performance problem where creating files > in a directory containing ~180k files is taking significant time to > complete. Sometimes creating an empty file will take >100 seconds to > complete. This is a three node cluster. I'm currently running OCFS2 > 1.2.3-1. Are there any changes in a recent version that may address > this issue? What should I look at to troubleshoot? The systems > overall utilization is low. > > (All 3 systems are identical) > RHEL 4 update 4 - 2.6.9-42.0.2.ELhugemem (32-bit) > ocfs2-2.6.9-42.0.2.ELhugemem-1.2.3-1 > ocfs2-tools-1.2.2-1 > > HP Proliant DL385 - 2 X 2.4 GHz AMD Opteron Processor 250 > 16GB RAM > 2 X emulex LP10000 HBAs > Powerpath 4.5.1 > > shared disks are from an EMC clariion CX500 > > > Thanks, > > Matt > ------------------------------------------------------------------------ > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users