On Mon, Nov 12, 2012 at 11:46:56AM +0200, Linas Jankauskas wrote: > > Servers are HP dl180 g6 > OS centos 6.3 x86_64 > > CPU > 2x Intel(R) Xeon(R) CPU L5630 @ 2.13GHz > > uname -r > 2.6.32-279.5.2.el6.x86_64 > > xfs_repair -V > xfs_repair version 3.1.1 > > > cat /proc/meminfo > MemTotal: 12187500 kB > MemFree: 153080 kB > Buffers: 6400308 kB That looks strange - 6GB of buffers? That's block device cached pages, and XFS doesn't use the block device for caching. You don't have much in the way of ext4 filesystems, either, so i don't thik that is responsible. > cat /proc/mounts > rootfs / rootfs rw 0 0 > proc /proc proc rw,relatime 0 0 > sysfs /sys sysfs rw,relatime 0 0 > devtmpfs /dev devtmpfs > rw,relatime,size=6084860k,nr_inodes=1521215,mode=755 0 0 A 6GB devtmpfs? That seems unusual. What is the purpose of having a 6GB ramdisk mounting on /dev? I wonder if that is consuming all that buffer space.... > logicaldrive 1 (20.0 TB, RAID 5, OK) > > physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SATA, 2 TB, OK) > physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SATA, 2 TB, OK) > physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SATA, 2 TB, OK) > physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SATA, 2 TB, OK) > physicaldrive 1I:1:5 (port 1I:box 1:bay 5, SATA, 2 TB, OK) > physicaldrive 1I:1:6 (port 1I:box 1:bay 6, SATA, 2 TB, OK) > physicaldrive 1I:1:7 (port 1I:box 1:bay 7, SATA, 2 TB, OK) > physicaldrive 1I:1:8 (port 1I:box 1:bay 8, SATA, 2 TB, OK) > physicaldrive 1I:1:9 (port 1I:box 1:bay 9, SATA, 2 TB, OK) > physicaldrive 1I:1:10 (port 1I:box 1:bay 10, SATA, 2 TB, OK) > physicaldrive 1I:1:11 (port 1I:box 1:bay 11, SATA, 2 TB, OK) > physicaldrive 1I:1:12 (port 1I:box 1:bay 12, SATA, 2 TB, OK) OK, so RAID5, but it doesn't tell me the geometry of it. > xfs_info /var > meta-data=/dev/sda5 isize=256 agcount=20, > agsize=268435455 blks > = sectsz=512 attr=2 > data = bsize=4096 blocks=5368633873, imaxpct=5 > = sunit=0 swidth=0 blks And no geometry here, either. > naming =version 2 bsize=4096 ascii-ci=0 > log =internal bsize=4096 blocks=521728, version=2 > = sectsz=512 sunit=0 blks, lazy-count=1 > realtime =none extsz=4096 blocks=0, rtextents=0 > > No dmesg errors. > > vmstat 5 > procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu----- > r b swpd free buff cache si so bi bo in cs us sy id wa st > 1 0 2788 150808 6318232 2475332 0 0 836 185 2 4 1 11 87 1 0 > 1 0 2788 150608 6318232 2475484 0 0 0 89 1094 126 0 12 88 0 0 > 1 0 2788 150500 6318232 2475604 0 0 0 60 1109 99 0 12 88 0 0 > 1 0 2788 150252 6318232 2475720 0 0 0 49 1046 79 0 12 88 0 0 > 1 0 2788 150344 6318232 2475844 0 0 1 157 1046 82 0 12 88 0 0 > 1 0 2788 149972 6318232 2475960 0 0 0 197 1086 144 0 12 88 0 0 > 1 0 2788 150020 6318232 2476088 0 0 0 76 1115 99 0 12 88 0 0 > 1 0 2788 150012 6318232 2476204 0 0 0 81 1131 132 0 12 88 0 0 > 1 0 2788 149624 6318232 2476340 0 0 0 53 1074 95 0 12 88 0 0 basically idle, but burning a CPu in system time. > iostat -x -d -m 5 > Linux 2.6.32-279.5.2.el6.x86_64 (storage) 11/12/2012 > _x86_64_ (8 CPU) > > Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util > sda 103.27 1.51 92.43 37.65 6.52 1.44 125.36 0.73 5.60 1.13 14.74 > sda 0.00 0.20 2.40 19.80 0.01 0.09 9.08 0.13 5.79 2.25 5.00 > sda 0.00 3.60 0.60 36.80 0.00 4.15 227.45 0.12 3.21 0.64 2.38 > sda 0.00 0.40 1.20 36.80 0.00 8.01 431.83 0.11 3.00 1.05 4.00 > sda 0.00 0.60 0.00 20.60 0.00 0.08 8.39 0.01 0.69 0.69 1.42 > sda 0.00 38.40 4.20 27.40 0.02 0.27 18.34 0.25 8.06 2.63 8.32 Again, pretty much idle. So, it's not doing IO, it's not thrashing caches, so what is burning cpu? Can you take a profile? maybe just run 'perf top' for 15s and then just paste the top 10 samples? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
