[Bug 507457] New: NFS very slow performance
http://bugzilla.novell.com/show_bug.cgi?id=507457 Summary: NFS very slow performance Classification: openSUSE Product: openSUSE 10.3 Version: Final Platform: i586 OS/Version: openSUSE 10.3 Status: NEW Severity: Critical Priority: P5 - None Component: Other AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: michael.henninghaus@cae.de QAContact: qa@suse.de Found By: --- User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.6) Gecko/20070730 SUSE/2.0.0.6-25 Firefox/2.0.0.6 Hello, we have a very strange problem in using the nfs-kernel-server (nfs-kernel-server-1.1.0-8) on our SuSE 10.3 Systems (kernel-default-2.6.22.5-31). We have to use this kernel cause of some softwaredependencies. The async option can't be used cause of the process-structure we use. The performance is very bad! If we try to write files on the system it takes a very long time. For example: creating a testfile on the nfs-mount with "time dd if=/dev/zero of=/home/user/nfs/testfile bs=16k count=4096" it takes about 7 seconds to create this file. if we try to copy a directory with size 64 MB and lots of small files this takes about 3 minutes. An older system (SuSE 9.3) takes only 1 second to create the testfile and about 30sec. to copy the directory. During the action on the nfs we see a iowat of about 40% Our configuration: CLIENT: /etc/fstab syst:/usr/nfs_server/nfs_sira /home/user/nfs nfs rsize=8192,wsize=8192,timeo=14,hard,intr,user,exec,bg 0 0 syst:/usr/nfs_server/nfs_ootw /home/user/nfs nfs rsize=8192,wsize=8192,timeo=14,hard,intr,user,exec,bg 0 0 SERVER (syst): /etc/exports /usr/nfs_server *(rw,no_root_squash,sync,no_subtree_check) top [H[2J(B[mtop - 16:17:48 up 54 min, 5 users, load average: 0.61, 0.51, 0.46(B[m[39;49m[K Tasks:(B[m[39;49m(B[m 125 (B[m[39;49mtotal,(B[m[39;49m(B[m 2 (B[m[39;49mrunning,(B[m[39;49m(B[m 123 (B[m[39;49msleeping,(B[m[39;49m(B[m 0 (B[m[39;49mstopped,(B[m[39;49m(B[m 0 (B[m[39;49mzombie(B[m[39;49m[K Cpu(s):(B[m[39;49m(B[m 0.7%(B[m[39;49mus,(B[m[39;49m(B[m 0.5%(B[m[39;49msy,(B[m[39;49m(B[m 7.5%(B[m[39;49mni,(B[m[39;49m(B[m 84.3%(B[m[39;49mid,(B[m[39;49m(B[m 5.8%(B[m[39;49mwa,(B[m[39;49m(B[m 0.0%(B[m[39;49mhi,(B[m[39;49m(B[m 1.2%(B[m[39;49msi,(B[m[39;49m(B[m 0.0%(B[m[39;49mst(B[m[39;49m[K Mem: (B[m[39;49m(B[m 1002248k (B[m[39;49mtotal,(B[m[39;49m(B[m 813532k (B[m[39;49mused,(B[m[39;49m(B[m 188716k (B[m[39;49mfree,(B[m[39;49m(B[m 82692k (B[m[39;49mbuffers(B[m[39;49m[K Swap:(B[m[39;49m(B[m 4200988k (B[m[39;49mtotal,(B[m[39;49m(B[m 0k (B[m[39;49mused,(B[m[39;49m(B[m 4200988k (B[m[39;49mfree,(B[m[39;49m(B[m 593800k (B[m[39;49mcached(B[m[39;49m[K [6;1H [7m PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND (B[m[39;49m[K (B[m 4965 root 15 0 0 0 0 S 2 0.0 0:00.76 nfsd (B[m[39;49m (B[m(B[m 5421 root 15 0 2188 908 688 R 2 0.1 0:00.01 top (B[m[39;49m (B[m 1 root 15 0 744 288 240 S 0 0.0 0:00.88 init (B[m[39;49m (B[m 2 root 10 -5 0 0 0 S 0 0.0 0:00.01 kthreadd (B[m[39;49m (B[m 3 root RT -5 0 0 0 S 0 0.0 0:00.00 migration/0 (B[m[39;49m (B[m 4 root 34 19 0 0 0 S 0 0.0 0:00.01 ksoftirqd/0 (B[m[39;49m (B[m 5 root RT -5 0 0 0 S 0 0.0 0:00.00 migration/1 (B[m[39;49m (B[m(B[m 6 root 34 19 0 0 0 R 0 0.0 0:00.04 ksoftirqd/1 (B[m[39;49m (B[m 7 root 10 -5 0 0 0 S 0 0.0 0:00.07 events/0 (B[m[39;49m (B[m 8 root 10 -5 0 0 0 S 0 0.0 0:00.05 events/1 (B[m[39;49m (B[m 9 root 10 -5 0 0 0 S 0 0.0 0:00.00 khelper (B[m[39;49m (B[m 29 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd/0 (B[m[39;49m (B[m 30 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd/1 (B[m[39;49m (B[m 31 root 20 -5 0 0 0 S 0 0.0 0:00.00 kacpid (B[m[39;49m (B[m 32 root 20 -5 0 0 0 S 0 0.0 0:00.00 kacpi_notify (B[m[39;49m (B[m 150 root 20 -5 0 0 0 S 0 0.0 0:00.00 cqueue/0 (B[m[39;49m (B[m 151 root 10 -5 0 0 0 S 0 0.0 0:00.00 cqueue/1 (B[m[39;49m[6;1H[K[25;1H[?12l[?25h We tried everythin on our system, increasing the RPCNFSDCOUNT, tuning the rsize,wsize, deactivating NFSv4, turning down the firewall .... but the system is still so slow. Connection between the systems over a 100MBit/s switch. netstat and nfsstat don't show any problems. Reproducible: Always Steps to Reproduce: 1. 2. 3. -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
http://bugzilla.novell.com/show_bug.cgi?id=507457
Michael Henninghaus
http://bugzilla.novell.com/show_bug.cgi?id=507457
Michael Henninghaus
http://bugzilla.novell.com/show_bug.cgi?id=507457
Michael Henninghaus
http://bugzilla.novell.com/show_bug.cgi?id=507457
User binner@kde.org added comment
http://bugzilla.novell.com/show_bug.cgi?id=507457#c1
Stephan Binner
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User michael.henninghaus@cae.de added comment
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--- Comment #2 from Michael Henninghaus
http://bugzilla.novell.com/show_bug.cgi?id=507457
Marcus Meissner
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User michael.henninghaus@cae.de added comment
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--- Comment #3 from Michael Henninghaus
http://bugzilla.novell.com/show_bug.cgi?id=507457
Michael Henninghaus
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User michael.henninghaus@cae.de added comment
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--- Comment #4 from Michael Henninghaus
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User nfbrown@novell.com added comment
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--- Comment #6 from Neil Brown
http://bugzilla.novell.com/show_bug.cgi?id=507457
User nfbrown@novell.com added comment
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Neil Brown
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