High CPU Wait - Aix
This is a discussion on High CPU Wait - Aix ; Hi All
Do you know why high CPU wait about 30% to 60% wait ?
Is it CPU power problem or application problem ?
Wed Apr 30 10:21:31 2008 Interval: 2 Cswitch 1329
Readch 3592.7K
Syscall 8358
Writech 916.4K
Kernel ...
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High CPU Wait
Hi All
Do you know why high CPU wait about 30% to 60% wait ?
Is it CPU power problem or application problem ?
Wed Apr 30 10:21:31 2008 Interval: 2 Cswitch 1329
Readch 3592.7K
Syscall 8358
Writech 916.4K
Kernel 38.1 |########### | Reads 2116
Rawin 132
User 12.3 |#### | Writes 1145
Ttyout 44803
Wait 49.5 |############## | Forks 0
Igets 1
Idle 0.1 |# | Execs 0
Namei 363
Runqueue 5.0
Dirblk 113
Network KBPS I-Pack O-Pack KB-In KB-Out Waitqueue 26.53
en0 145.0 215.0 145.4 84.6 60.4
lo0 0.1 1.0 1.0 0.1 0.1 PAGING
MEMORY
Faults 276
Real,MB 7692
Disk Busy% KBPS TPS KB-Read KB-Writ Steals 362 %
Comp 58.5
hdisk3 100.2 1076.7 153.4 924.3 152.4 PgspIn 2 %
Noncomp 42.4
hdisk2 4.5 134.3 3.0 0.0 134.3 PgspOut 2 %
Client 1.0
hdisk1 2.5 8.0 2.0 0.0 8.0 PageIn 232
hdisk0 2.0 16.0 4.0 8.0 8.0 PageOut 73
PAGING SPACE
Sios 177
Size,MB 3072
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Re: High CPU Wait
Wait time is when the processor has nothing to do because it is waiting
for I/O (probably disk). hdisk3 seems to be very busy
moonhkt wrote:
> Hi All
>
> Do you know why high CPU wait about 30% to 60% wait ?
> Is it CPU power problem or application problem ?
>
> Wed Apr 30 10:21:31 2008 Interval: 2 Cswitch 1329
> Readch 3592.7K
> Syscall 8358
> Writech 916.4K
> Kernel 38.1 |########### | Reads 2116
> Rawin 132
> User 12.3 |#### | Writes 1145
> Ttyout 44803
> Wait 49.5 |############## | Forks 0
> Igets 1
> Idle 0.1 |# | Execs 0
> Namei 363
> Runqueue 5.0
> Dirblk 113
> Network KBPS I-Pack O-Pack KB-In KB-Out Waitqueue 26.53
> en0 145.0 215.0 145.4 84.6 60.4
> lo0 0.1 1.0 1.0 0.1 0.1 PAGING
> MEMORY
> Faults 276
> Real,MB 7692
> Disk Busy% KBPS TPS KB-Read KB-Writ Steals 362 %
> Comp 58.5
> hdisk3 100.2 1076.7 153.4 924.3 152.4 PgspIn 2 %
> Noncomp 42.4
> hdisk2 4.5 134.3 3.0 0.0 134.3 PgspOut 2 %
> Client 1.0
> hdisk1 2.5 8.0 2.0 0.0 8.0 PageIn 232
> hdisk0 2.0 16.0 4.0 8.0 8.0 PageOut 73
> PAGING SPACE
> Sios 177
> Size,MB 3072
-
Re: High CPU Wait
On Tue, 29 Apr 2008 22:14:16 -0700, Roy wrote:
>Wait time is when the processor has nothing to do because it is waiting
>for I/O (probably disk). hdisk3 seems to be very busy
Youz need a faster machine! I'm Guy Polis. I know about these
things.
>
>
>moonhkt wrote:
>> Hi All
>>
>> Do you know why high CPU wait about 30% to 60% wait ?
>> Is it CPU power problem or application problem ?
>>
>> Wed Apr 30 10:21:31 2008 Interval: 2 Cswitch 1329
>> Readch 3592.7K
>> Syscall 8358
>> Writech 916.4K
>> Kernel 38.1 |########### | Reads 2116
>> Rawin 132
>> User 12.3 |#### | Writes 1145
>> Ttyout 44803
>> Wait 49.5 |############## | Forks 0
>> Igets 1
>> Idle 0.1 |# | Execs 0
>> Namei 363
>> Runqueue 5.0
>> Dirblk 113
>> Network KBPS I-Pack O-Pack KB-In KB-Out Waitqueue 26.53
>> en0 145.0 215.0 145.4 84.6 60.4
>> lo0 0.1 1.0 1.0 0.1 0.1 PAGING
>> MEMORY
>> Faults 276
>> Real,MB 7692
>> Disk Busy% KBPS TPS KB-Read KB-Writ Steals 362 %
>> Comp 58.5
>> hdisk3 100.2 1076.7 153.4 924.3 152.4 PgspIn 2 %
>> Noncomp 42.4
>> hdisk2 4.5 134.3 3.0 0.0 134.3 PgspOut 2 %
>> Client 1.0
>> hdisk1 2.5 8.0 2.0 0.0 8.0 PageIn 232
>> hdisk0 2.0 16.0 4.0 8.0 8.0 PageOut 73
>> PAGING SPACE
>> Sios 177
>> Size,MB 3072