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 ...

+ Reply to Thread
Results 1 to 3 of 3

Thread: High CPU Wait

  1. 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

  2. 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


  3. 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



+ Reply to Thread