Originally posted by: Chtz
Hi All,
When i was checking one of the server's performance found below output from vmstat -v
OUtput:
vmstat -v
3145728 memory pages
3019216 lruable pages
50497 free pages
2 memory pools
2262978 pinned pages
80.0 maxpin percentage
3.0 minperm percentage
90.0 maxperm percentage
0.0 numperm percentage
1902 file pages
0.0 compressed percentage
0 compressed pages
0.0 numclient percentage
90.0 maxclient percentage
1902 client pages
0 remote pageouts scheduled
9771310 pending disk I/Os blocked with no pbuf
68591167 paging space I/Os blocked with no psbuf
1972 filesystem I/Os blocked with no fsbuf
40058 client filesystem I/Os blocked with no fsbuf
59879 external pager filesystem I/Os blocked with no fsbuf
98.3 percentage of memory used for computational pages
and vmstat with intervals are below:
vmstat -wtI 2 5
System configuration: lcpu=4 mem=12288MB ent=0.10
kthr memory page faults cpu time
----------- --------------------- ------------------------------------ ------------------ ----------------------- --------
r b p avm fre fi fo pi po fr sr in sy cs us sy id wa pc ec hr mi se
4 2 0 10019754 53564 1 0 787 144 153 6541 948 5409 3035 11 61 21 7 0.88 883.6 14:45:22
10 0 0 10019766 54776 6 489 395 809 1012 8042 852 4601 2322 4 68 25 3 0.90 898.2 14:45:24
1 0 0 10019766 54928 2 28 78 121 154 4431 207 8753 1650 32 31 36 1 0.31 308.7 14:45:26
2 0 0 10019766 55322 4 47 65 173 262 1069 175 38579 1601 32 33 32 2 0.27 268.7 14:45:28
4 1 0 10019780 53484 4 1 905 0 0 0 1019 2818 2998 41 18 35 6 0.34 337.5 14:45:30
Without changing the kernel parameters how to troubleshoot this issue. Also is this related to I/O bottleneck?
Iostat output says:
iostat
System configuration: lcpu=4 drives=9 ent=0.10 paths=36 vdisks=0
tty: tin tout avg-cpu: % user % sys % idle % iowait physc % entc
0.0 6.6 47.3 18.8 32.1 1.9 0.8 849.5
Disks: % tm_act Kbps tps Kb_read Kb_wrtn
hdisk10 1.3 98.1 18.2 1625845706 64246700
hdisk11 0.3 195.7 6.7 1936882976 1432660904
hdisk14 0.2 88.4 4.2 928510788 594305860
hdisk18 17.3 4624.4 1005.6 57013958616 22618550532
hdisk16 0.9 190.2 12.2 1634475932 1641066008
hdisk13 0.2 70.0 2.8 808781236 397040512
hdisk17 0.2 178.5 1.2 1655344812 1418714364
hdisk15 0.2 464.4 3.3 7933227672 64342084
hdisk12 0.2 69.8 2.3 890986020 310596408
Can anyone suggest me how to clear the I/O blocks, If increasing the CPU units will clear the I/O blocks?????
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