Your message dated Sat, 24 Apr 2021 08:00:54 -0700 (PDT) with message-id <[email protected]> and subject line Closing this bug (BTS maintenance for src:linux bugs) has caused the Debian Bug report #702477, regarding nfs-common: client-side directory walk performance degradaton to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 702477: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=702477 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: nfs-common Version: 1:1.2.6-3 Severity: normal I believe there is performance degradation in NFS4 client: sudo mount -t nfs4 debmain:/tmp /mnt/tmp /usr/bin/time -p sh -c 'tree /mnt/tmp | tail -1' 287 directories, 63315 files real 4.22 user 1.32 sys 1.04 When /usr/bin/time -p sh -c 'tree /mnt/tmp | tail -1' is repeated several seconds later the output is this: 287 directories, 63315 files real 24.64 user 1.58 sys 3.42 I tracked it down to "acregmin" NFS mount option: when "acregmin" is over/expired directory walk becomes ~5 times slower in my case. Setting "acregmin=120" on mount will delay the problem for exactly 120 seconds: `tree` will walk directory structure in less than 4 seconds within 2 minutes after first walk, then 120 seconds later it slows down to >24 seconds needed to walk the same tree again. Setting "acregmin=0" makes directory walk time >24 seconds even for the first walk. Cheers, Dmitry Smirnov GPG key : 4096R/53968D1B --- System information. --- Architecture: amd64 Kernel: Linux 3.7-trunk-amd64 --- Package information. --- Depends (Version) | Installed =========================================-+-=================== libc6 (>= 2.3) | 2.13-38 libcap2 (>= 2.10) | 1:2.22-1.2 libcomerr2 (>= 1.01) | 1.42.5-1 libdevmapper1.02.1 (>= 2:1.02.20) | 2:1.02.74-6 libevent-2.0-5 (>= 2.0.10-stable) | 2.0.19-stable-3 libgssglue1 | 0.4-2 libk5crypto3 (>= 1.6.dfsg.2) | 1.10.1+dfsg-4 libkeyutils1 | 1.5.5-3 libkrb5-3 (>= 1.6.dfsg.2) | 1.10.1+dfsg-4 libmount1 (>= 2.19.1) | 2.20.1-5.3 libnfsidmap2 | 0.25-4 libtirpc1 | 0.2.2-5 libwrap0 (>= 7.6-4~) | 7.6.q-24 rpcbind | 0.2.0-8 adduser | 3.113+nmu3 ucf | 3.0025+nmu3 lsb-base (>= 1.3-9ubuntu3) | 4.1+Debian8 initscripts (>= 2.88dsf-13.3) | 2.88dsf-41 libblkid1 (>= 2.16) | 2.20.1-5.3 libc6 (>= 2.3) | 2.13-38 libtirpc1 | 0.2.2-5 libwrap0 (>= 7.6-4~) | 7.6.q-24 nfs-common (= 1:1.2.6-3) | 1:1.2.6-3 ucf | 3.0025+nmu3 lsb-base (>= 1.3-9ubuntu3) | 4.1+Debian8 Recommends (Version) | Installed =========================-+-=========== python | 2.7.3-4 Suggests (Version) | Installed =========================-+-=========== open-iscsi | watchdog | -- /etc/default/nfs-common -- NEED_STATD=no STATDOPTS= NEED_IDMAPD=yes NEED_GSSD= -- /etc/idmapd.conf -- [General] Verbosity = 0 Pipefs-Directory = /var/lib/nfs/rpc_pipefs Domain = local [Mapping] Nobody-User = nobody Nobody-Group = nogroup -- /etc/fstab --
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--- Begin Message ---Hi This bug was filed for a very old kernel or the bug is old itself without resolution. If you can reproduce it with - the current version in unstable/testing - the latest kernel from backports please reopen the bug, see https://www.debian.org/Bugs/server-control for details. Regards, Salvatore
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