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Hi everybody
recently i've found myself troubleshooting high cpu issues on a FAS2240 lab storage , running version 8.1.4P1 7-Mode
I've gone through the other discussions in the forum for similar issues, but i could not understand what's the issue in my specific case, at least nothing clear enough for a newbie like me.
Thats why i'm here askin!
At first the issue seems to be related to backup jobs running together (reading) from this volumes
But it's still strange this high cpu consumption for a not so exagerate access to the filer
And also one single cpu seems to be much loaded than the others
Can you tel me what you think about this issue?
I'm pasting outputs of sysstat -m 1 and a statit output
Any help will be really appreciated!
sysstat -M 1
ANY1+ ANY2+ ANY3+ ANY4+ AVG CPU0 CPU1 CPU2 CPU3 Network Protocol Cluster Storage Raid Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt Intr Host Ops/s CP
99% 66% 36% 13% 54% 49% 48% 50% 68% 6% 0% 0% 10% 15% 0% 6% 135%( 91%) 17% 0% 0% 23% 2% 1% 961 44%
93% 63% 35% 14% 52% 42% 48% 49% 68% 7% 0% 0% 9% 16% 0% 12% 126%( 78%) 7% 0% 0% 27% 2% 2% 1042 100%
99% 54% 25% 8% 47% 31% 36% 42% 80% 7% 0% 0% 10% 16% 0% 9% 113%( 90%) 0% 0% 0% 30% 2% 0% 1042 100%
100% 62% 33% 12% 52% 39% 42% 45% 83% 10% 0% 0% 9% 14% 0% 22% 124%( 78%) 0% 0% 0% 28% 3% 1% 1584 100%
100% 70% 43% 17% 58% 47% 53% 54% 77% 5% 0% 0% 12% 18% 0% 29% 131%( 71%) 0% 0% 0% 34% 2% 0% 726 100%
100% 56% 29% 10% 49% 38% 43% 42% 74% 6% 0% 0% 8% 9% 0% 32% 114%( 67%) 0% 0% 0% 24% 2% 1% 1016 3%
100% 52% 22% 6% 45% 34% 35% 34% 79% 5% 0% 0% 7% 9% 0% 42% 96%( 58%) 0% 0% 0% 20% 2% 1% 749 0%
100% 55% 23% 7% 47% 34% 35% 35% 82% 7% 0% 0% 8% 9% 0% 46% 94%( 54%) 0% 0% 0% 20% 2% 1% 1012 0%
100% 54% 24% 7% 47% 34% 35% 37% 83% 7% 0% 0% 7% 9% 0% 46% 96%( 54%) 0% 0% 0% 21% 2% 1% 1102 0%
100% 55% 22% 7% 47% 33% 34% 35% 84% 6% 0% 0% 7% 9% 0% 40% 99%( 60%) 0% 0% 0% 22% 2% 1% 1050 0%
100% 56% 23% 7% 47% 36% 34% 36% 81% 6% 0% 0% 7% 9% 0% 41% 100%( 59%) 0% 0% 0% 22% 2% 1% 986 0%
100% 56% 24% 8% 47% 36% 35% 37% 80% 9% 0% 0% 7% 8% 0% 39% 101%( 60%) 0% 0% 0% 21% 3% 1% 1666 0%
100% 39% 13% 3% 39% 21% 23% 25% 87% 5% 0% 0% 5% 6% 0% 59% 67%( 41%) 0% 0% 0% 13% 2% 1% 789 0%
100% 40% 14% 3% 40% 22% 24% 27% 86% 5% 0% 0% 5% 6% 0% 58% 67%( 41%) 0% 0% 0% 14% 2% 1% 805 0%
sysstat -m 1
ANY AVG CPU0 CPU1 CPU2 CPU3
98% 37% 19% 20% 23% 85%
98% 36% 17% 19% 21% 87%
98% 35% 18% 20% 22% 81%
100% 53% 42% 46% 54% 70%
99% 52% 39% 40% 45% 82%
98% 44% 27% 30% 35% 83%
98% 39% 20% 24% 27% 84%
98% 36% 18% 20% 21% 86%
98% 38% 19% 21% 23% 87%
98% 36% 18% 20% 20% 86%
99% 37% 18% 21% 22% 87%
statit output
NetApp Release 8.1.4P1 7-Mode: Tue Feb 11 23:23:31 PST 2014
<1O>
Start time: Tue May 29 12:30:35 CEST 2018
CPU Statistics
34.996478 time (seconds) 100 %
76.183660 system time 218 %
0.868077 rupt time 2 % (548773 rupts x 2 usec/rupt)
75.315583 non-rupt system time 215 %
63.802248 idle time 182 %
12.567883 time in CP 36 % 100 %
0.316754 rupt time in CP 3 % (199350 rupts x 2 usec/rupt)
Multiprocessor Statistics (per second)
cpu0 cpu1 cpu2 cpu3 total
sk switches 81955.99 80712.01 77287.18 35537.06 275492.24
hard switches 32001.85 41487.89 42621.32 3839.70 119950.76
domain switches 287.91 108.95 107.47 59.78 564.11
CP rupts 2833.09 718.10 1427.00 718.10 5696.29
nonCP rupts 4722.73 1281.53 2698.70 1281.56 9984.52
IPI rupts 0.00 0.00 0.00 0.00 0.00
grab kahuna 0.00 0.00 0.00 0.00 0.00
grab kahuna usec 0.00 0.00 0.00 0.00 0.00
CP rupt usec 5148.78 429.07 3049.82 423.33 9051.03
nonCP rupt usec 8501.00 745.73 5772.01 734.85 15753.64
idle 563929.32 516761.60 486932.26 255481.71 1823104.91
kahuna 0.00 0.00 0.00 175594.61 175594.61
storage 92.55 129513.60 95.12 0.00 129701.31
exempt 104146.37 92548.17 92974.21 15.54 289684.32
raid 92.75 86.61 169142.73 0.00 169322.12
target 4.26 8.26 8.86 0.00 21.40
dnscache 0.00 0.00 0.00 0.00 0.00
cifs 37.80 35.40 47.92 0.00 121.13
wafl_exempt 277168.81 227652.62 210612.02 567749.90 1283183.44
wafl_xcleaner 13044.43 7011.73 5080.25 0.00 25136.44
sm_exempt 13.03 14.66 16.86 0.00 44.58
cluster 0.00 0.00 0.00 0.00 0.00
protocol 28.63 36.20 29.20 0.00 94.07
nwk_exclusive 208.39 174.16 191.68 0.00 574.23
nwk_exempt 23618.78 22714.40 24124.71 0.00 70457.92
nwk_legacy 1479.49 3.43 4.17 0.00 1487.15
hostOS 2485.39 2264.14 1917.96 0.00 6667.53
34.416757 seconds with one or more CPUs active ( 98%)
22.918672 seconds with 2 or more CPUs active ( 65%)
13.201712 seconds with 3 or more CPUs active ( 38%)
11.498085 seconds with one CPU active ( 33%)
9.716959 seconds with 2 CPUs active ( 28%)
8.187941 seconds with 3 CPUs active ( 23%)
5.013771 seconds with all CPUs active ( 14%)
Domain Utilization of Shared Domains (per second)
0.00 idle 801408.27 kahuna
0.00 storage 0.00 exempt
0.00 raid 0.00 target
0.00 dnscache 0.00 cifs
0.00 wafl_exempt 0.00 wafl_xcleaner
0.00 sm_exempt 0.00 cluster
0.00 protocol 70751.95 nwk_exclusive
0.00 nwk_exempt 0.00 nwk_legacy
0.00 hostOS
Miscellaneous Statistics (per second)
119950.76 hard context switches 1134.66 NFS operations
0.00 CIFS operations 0.00 HTTP operations
9660.77 network KB received 4682.99 network KB transmitted
69859.03 disk KB read 26079.54 disk KB written
9738.75 NVRAM KB written 508.28 nolog KB written
1048.99 WAFL bufs given to clients 0.00 checksum cache hits ( 0%)
1048.99 no checksum - partial buffer 0.00 FCP operations
0.00 iSCSI operations
WAFL Statistics (per second)
37.26 name cache hits ( 79%) 10.09 name cache misses ( 21%)
496287.86 buf hash hits ( 86%) 79762.97 buf hash misses ( 14%)
42794.68 inode cache hits ( 100%) 0.00 inode cache misses ( 0%)
102960.05 buf cache hits ( 89%) 12101.25 buf cache misses ( 11%)
10912.41 blocks read 5196.67 blocks read-ahead
2476.91 chains read-ahead 501.94 dummy reads
179.68 blocks speculative read-ahead 4095.30 blocks written
38.55 stripes written 23.32 blocks page flipped
0.00 blocks over-written 0.06 wafl_timer generated CP
0.00 snapshot generated CP 0.00 wafl_avail_bufs generated CP
0.00 dirty_blk_cnt generated CP 0.03 full NV-log generated CP
0.00 back-to-back CP 0.00 flush generated CP
0.00 sync generated CP 0.00 deferred back-to-back CP
0.00 container-indirect-pin CP 0.00 low mbufs generated CP
0.00 low datavecs generated CP 33660.42 non-restart messages
2393.10 IOWAIT suspends 245451070.10 next nvlog nearly full msecs
0.00 dirty buffer susp msecs 0.00 nvlog full susp msecs
763878 buffers
RAID Statistics (per second)
1358.62 xors 0.00 long dispatches [0]
0.00 long consumed [0] 0.00 long consumed hipri [0]
0.00 long low priority [0] 0.00 long high priority [0]
0.00 long monitor tics [0] 0.00 long monitor clears [0]
0.00 long dispatches [1] 0.00 long consumed [1]
0.00 long consumed hipri [1] 0.00 long low priority [1]
0.00 long high priority [1] 0.00 long monitor tics [1]
0.00 long monitor clears [1] 18 max batch
1.40 blocked mode xor 338.12 timed mode xor
0.34 fast adjustments 0.51 slow adjustments
0 avg batch start 0 avg stripe/msec
8349.93 checksum dispatches 48068.07 checksum consumed
38.89 tetrises written 0.00 master tetrises
0.00 slave tetrises 1209.64 stripes written
148.99 partial stripes 1060.65 full stripes
4095.64 blocks written 629.18 blocks read
913.86 1 blocks per stripe size 1 1.29 1 blocks per stripe size 10
1.14 2 blocks per stripe size 10 1.71 3 blocks per stripe size 10
1.57 4 blocks per stripe size 10 2.23 5 blocks per stripe size 10
4.20 6 blocks per stripe size 10 7.00 7 blocks per stripe size 10
17.66 8 blocks per stripe size 10 33.37 9 blocks per stripe size 10
73.21 10 blocks per stripe size 10 1.00 1 blocks per stripe size 14
0.49 2 blocks per stripe size 14 0.20 3 blocks per stripe size 14
0.29 4 blocks per stripe size 14 0.83 5 blocks per stripe size 14
1.83 6 blocks per stripe size 14 2.14 7 blocks per stripe size 14
5.20 8 blocks per stripe size 14 3.91 9 blocks per stripe size 14
6.40 10 blocks per stripe size 14 8.06 11 blocks per stripe size 14
15.72 12 blocks per stripe size 14 32.75 13 blocks per stripe size 14
73.58 14 blocks per stripe size 14
Network Interface Statistics (per second)
iface side bytes packets multicasts errors collisions pkt drops
e0a recv 0.00 0.00 0.00 0.00 0.00
xmit 0.00 0.00 0.00 0.00 0.00
e0b recv 0.00 0.00 0.00 0.00 0.00
xmit 0.00 0.00 0.00 0.00 0.00
e0c recv 0.00 0.00 0.00 0.00 0.00
xmit 0.00 0.00 0.00 0.00 0.00
e0d recv 0.00 0.00 0.00 0.00 0.00
xmit 0.00 0.00 0.00 0.00 0.00
e1a recv 3285927.72 1669.20 0.00 0.00 0.00
xmit 1074216.90 648.38 0.03 0.00 0.00
e1b recv 6606299.95 1060.85 0.00 0.00 0.00
xmit 3721098.25 815.02 0.03 0.00 0.00
e0M recv 419.36 4.46 3.46 0.00 0.00
xmit 71.78 0.69 0.00 0.00 0.00
e0P recv 0.00 0.00 0.00 0.00 0.00
xmit 0.00 0.00 0.00 0.00 0.00
vh recv 0.00 0.00 0.00 0.00 0.00
xmit 0.00 0.00 0.00 0.00 0.00
VIF2240-B_10G recv 9880761.03 2780.57 1.14 0.00 0.00
xmit 5786275.38 1488.06 0.06 0.00 0.00
Disk Statistics (per second)
ut% is the percent of time the disk was busy.
xfers is the number of data-transfer commands issued per second.
xfers = ureads + writes + cpreads + greads + gwrites
chain is the average number of 4K blocks per command.
usecs is the average disk round-trip time per 4K block.
disk ut% xfers ureads--chain-usecs writes--chain-usecs cpreads-chain-usecs greads--chain-usecs gwrites-chain-usecs
/SAS_SSD_10K_01B/plex0/rg0:
0b.20.2 2 8.32 0.00 .... . 2.63 57.97 119 5.69 16.04 140 0.00 .... . 0.00 .... .
0a.01.1 3 8.43 0.00 .... . 2.83 54.01 117 5.60 15.30 152 0.00 .... . 0.00 .... .
0a.00.14 28 308.14 302.59 2.05 1386 2.60 51.15 205 2.94 8.57 872 0.00 .... . 0.00 .... .
0b.20.3 26 294.22 289.22 2.04 1367 2.43 56.75 224 2.57 6.90 1013 0.00 .... . 0.00 .... .
0a.00.15 25 282.16 277.84 2.05 1302 2.43 56.00 193 1.89 10.53 620 0.00 .... . 0.00 .... .
0b.20.4 27 286.42 282.19 2.01 1449 2.43 59.68 183 1.80 7.05 1000 0.00 .... . 0.00 .... .
0a.00.16 26 311.74 306.42 1.91 1338 2.34 53.26 210 2.97 11.12 451 0.00 .... . 0.00 .... .
0b.20.5 28 306.42 301.42 2.24 1251 2.40 54.75 212 2.60 9.68 817 0.00 .... . 0.00 .... .
0a.00.17 26 269.96 265.58 2.01 1322 2.43 58.02 189 1.94 8.22 522 0.00 .... . 0.00 .... .
0b.20.6 26 276.47 271.47 1.96 1445 2.46 55.19 223 2.54 9.60 1014 0.00 .... . 0.00 .... .
0a.00.18 27 315.65 311.31 1.96 1307 2.43 58.69 200 1.91 7.16 1213 0.00 .... . 0.00 .... .
0b.20.7 28 301.73 296.08 1.98 1540 2.40 54.10 221 3.26 8.09 566 0.00 .... . 0.00 .... .
0a.00.19 28 271.36 266.13 2.11 1547 2.31 56.60 222 2.92 9.04 752 0.00 .... . 0.00 .... .
0b.20.8 27 294.56 289.82 2.07 1365 2.43 56.16 212 2.31 7.94 787 0.00 .... . 0.00 .... .
0a.00.20 26 293.65 289.36 2.23 1198 2.43 58.35 181 1.86 8.05 885 0.00 .... . 0.00 .... .
0b.20.9 28 304.48 299.91 2.00 1381 2.43 58.29 204 2.14 7.45 1297 0.00 .... . 0.00 .... .
/SAS_SSD_10K_01B/plex0/rg1:
0b.20.10 3 7.32 0.00 .... . 2.31 61.95 155 5.00 16.51 391 0.00 .... . 0.00 .... .
0a.00.21 2 7.34 0.00 .... . 2.34 61.22 112 5.00 16.51 101 0.00 .... . 0.00 .... .
0b.20.11 32 276.93 272.27 1.73 2768 2.29 55.14 421 2.37 8.99 1672 0.00 .... . 0.00 .... .
0a.00.22 28 283.42 278.53 1.94 1568 2.29 54.30 234 2.60 9.57 837 0.00 .... . 0.00 .... .
0b.20.12 34 260.50 256.24 2.12 2583 2.29 58.13 353 1.97 7.19 2137 0.00 .... . 0.00 .... .
0a.00.23 29 322.31 316.97 1.90 1438 2.29 56.86 203 3.06 5.48 1111 0.00 .... . 0.00 .... .
0b.20.13 34 308.22 303.31 1.98 2230 2.29 56.91 318 2.63 6.59 2012 0.00 .... . 0.00 .... .
0b.20.14 29 268.58 264.07 2.04 1691 2.29 56.79 205 2.23 8.21 1216 0.00 .... . 0.00 .... .
0b.20.15 28 279.59 274.58 2.05 1438 2.26 55.66 244 2.74 8.74 735 0.00 .... . 0.00 .... .
0b.20.16 29 297.19 291.99 2.03 1461 2.29 54.99 217 2.92 7.03 1105 0.00 .... . 0.00 .... .
0b.20.17 26 270.53 265.70 1.87 1695 2.26 54.01 240 2.57 9.87 712 0.00 .... . 0.00 .... .
0b.20.18 26 275.10 269.98 1.94 1433 2.29 55.94 213 2.83 7.34 783 0.00 .... . 0.00 .... .
/SAS_SSD_10K_01B/plex0/rg2:
0b.01.20 2 228.83 0.00 .... . 227.74 3.98 30 1.09 3.55 104 0.00 .... . 0.00 .... .
0a.01.21 2 229.72 0.00 .... . 228.60 3.98 23 1.11 3.26 94 0.00 .... . 0.00 .... .
0b.01.22 24 1737.30 1508.56 1.90 329 227.74 3.98 29 1.00 3.89 132 0.00 .... . 0.00 .... .
/aggr0/plex0/rg0:
0a.00.12 1 2.00 0.34 1.00 417 1.60 5.11 346 0.06 1.00 6000 0.00 .... . 0.00 .... .
0b.20.1 1 2.11 0.34 1.00 250 1.77 4.81 349 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.13 0 0.63 0.03 1.00 8000 0.37 18.69 391 0.23 8.88 662 0.00 .... . 0.00 .... .
Aggregate statistics:
Minimum 0 0.63 0.00 0.37 0.00 0.00 0.00
Mean 21 270.33 245.63 22.18 2.46 0.00 0.00
Maximum 34 1737.30 1508.56 228.60 5.69 0.00 0.00
Spares and other disks:
0b.20.0 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.0 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.3 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.6 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.5 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.2 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.4 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.7 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.9 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.8 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.10 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.11 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.0 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.20.19 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.2 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.3 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.4 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.5 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.20.21 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.6 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.20.22 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.7 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.20.23 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.00.1 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.20.20 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.10 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.11 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.17 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.8 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.18 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.12 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.19 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.9 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.15 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.13 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.16 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0b.01.14 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
0a.01.23 0 0.00 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... . 0.00 .... .
FCP Statistics (per second)
0.00 FCP Bytes recv 0.00 FCP Bytes sent
0.00 FCP ops
iSCSI Statistics (per second)
0.00 iSCSI Bytes recv 0.00 iSCSI Bytes xmit
0.00 iSCSI ops
Interrupt Statistics (per second)
4104.61 int_0 2.03 int_1
2122.61 int_2 1445.40 int_3
4.94 Gigabit Ethernet (IRQ 😎 0.00 RTC
0.00 IPI 999.64 Msec Clock
8679.24 total
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Hi
i don't think you have an issue. at least not according to this output. do you see any latency/slowness anywhere?
from: https://kb.netapp.com/app/answers/answer_view/a_id/1002579/loc/en_US#__highlight
ANY1+ reports near to 100%, even though individual cores report low. ANY1+ represents the amount of time that at least one CPU core was busy doing work in a second. This can very easily give a false report of actual CPU levels on a storage system- especially systems with a high number of cores. A Perfstat is submitted and reviewed, and it shows that no other issues are present. ANY1+ reads 100% very easily, and this is where UM and many other tools get their CPU information from.
Gidi
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Ok, thank you
actually what worried me was two points
i never get cpu warnings from another storage which is monitored with the same tresholds, and which has apparently a similar workload
And i see one of the cpu (CPU3) is not balanced as the others
If you dont see a problem in the whole scenario i'll try to understand if the monitoring system can be tuned in order not to be warned when not critical
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Hi
Ontap 7 mode on the 8.1 version still had a lot of serial and heavy processes. it's ommon to see this type of unbalanced load.
Gidi
