About Paging Space - Aix

This is a discussion on About Paging Space - Aix ; Hi All About our system AIX 5.2 Memory : 8GB pageing Space is 3GB. Why the % using paging space is not high ? less than 30% ? Topas Monitor for host: sh EVENTS/QUEUES FILE/ TTY Fri Apr 18 11:44:39 ...

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Thread: About Paging Space

  1. About Paging Space

    Hi All

    About our system
    AIX 5.2
    Memory : 8GB
    pageing Space is 3GB.

    Why the % using paging space is not high ? less than 30% ?

    Topas Monitor for host: sh EVENTS/QUEUES FILE/
    TTY
    Fri Apr 18 11:44:39 2008 Interval: 5 Cswitch 1665
    Readch 22.0M
    Syscall 72941
    Writech 20.4M
    Kernel 22.2 |####### | Reads 21026
    Rawin 117
    User 73.2 |##################### | Writes 42368
    Ttyout 36440
    Wait 2.6 |# | Forks 4
    Igets 7
    Idle 2.0 |# | Execs 8
    Namei 3200
    Runqueue 9.4
    Dirblk 2748
    Network KBPS I-Pack O-Pack KB-In KB-Out Waitqueue 3.2
    en0 147.0 351.2 336.2 79.8 67.2
    lo0 0.1 1.2 1.2 0.1 0.1 PAGING
    MEMORY
    Faults 3196
    Real,MB 7692
    Disk Busy% KBPS TPS KB-Read KB-Writ Steals 428 %
    Comp 60.9
    hdisk4 89.2 21010.4 602.8 1273.6 19736.8 PgspIn 19 %
    Noncomp 40.0
    hdisk0 38.4 341.9 73.4 75.2 266.7 PgspOut 26 %
    Client 1.0
    hdisk1 34.6 269.1 55.4 3.2 265.9 PageIn 338
    hdisk3 0.0 0.0 0.0 0.0 0.0 PageOut 4975
    PAGING SPACE
    Sios 1572
    Size,MB 3072


    2008/04/16,04:00:04,Users,25,paging space,3072MB,12%
    2008/04/16,04:30:03,Users,37,paging space,3072MB,13%
    2008/04/16,05:00:05,Users,38,paging space,3072MB,12%
    2008/04/16,05:30:00,Users,40,paging space,3072MB,12%
    2008/04/16,06:00:01,Users,41,paging space,3072MB,12%
    2008/04/16,06:30:00,Users,45,paging space,3072MB,12%
    2008/04/16,07:00:11,Users,46,paging space,3072MB,12%
    2008/04/16,07:30:08,Users,50,paging space,3072MB,12%
    2008/04/16,08:00:01,Users,51,paging space,3072MB,12%
    2008/04/16,08:30:05,Users,94,paging space,3072MB,13%
    2008/04/16,09:00:03,Users,374,paging space,3072MB,13%
    2008/04/16,09:30:03,Users,519,paging space,3072MB,14%
    2008/04/16,10:00:01,Users,585,paging space,3072MB,15%
    2008/04/16,10:30:04,Users,626,paging space,3072MB,19%
    2008/04/16,11:00:00,Users,668,paging space,3072MB,20%
    2008/04/16,11:30:06,Users,674,paging space,3072MB,22%
    2008/04/16,12:00:03,Users,685,paging space,3072MB,23%
    2008/04/16,12:30:06,Users,658,paging space,3072MB,24%
    2008/04/16,13:00:05,Users,635,paging space,3072MB,24%
    2008/04/16,13:30:00,Users,643,paging space,3072MB,23%
    2008/04/16,14:00:04,Users,664,paging space,3072MB,24%
    2008/04/16,14:30:11,Users,667,paging space,3072MB,24%
    2008/04/16,15:00:01,Users,679,paging space,3072MB,24%
    2008/04/16,15:30:05,Users,686,paging space,3072MB,25%
    2008/04/16,16:00:07,Users,684,paging space,3072MB,26%
    2008/04/16,16:30:04,Users,675,paging space,3072MB,26%
    2008/04/16,17:00:08,Users,685,paging space,3072MB,27%
    2008/04/16,17:30:01,Users,586,paging space,3072MB,25%
    2008/04/16,18:00:00,Users,371,paging space,3072MB,22%
    2008/04/16,18:30:04,Users,333,paging space,3072MB,22%
    2008/04/16,19:00:01,Users,293,paging space,3072MB,20%
    2008/04/16,19:30:01,Users,271,paging space,3072MB,20%
    2008/04/16,20:00:00,Users,239,paging space,3072MB,19%
    2008/04/16,20:30:01,Users,205,paging space,3072MB,19%
    2008/04/16,21:00:03,Users,172,paging space,3072MB,19%
    2008/04/16,21:30:02,Users,165,paging space,3072MB,19%
    2008/04/16,22:00:00,Users,151,paging space,3072MB,19%
    2008/04/16,22:30:01,Users,139,paging space,3072MB,18%
    2008/04/16,23:00:01,Users,135,paging space,3072MB,17%
    2008/04/16,23:30:00,Users,130,paging space,3072MB,17%

  2. Re: About Paging Space

    On 18 Apr, 04:45, moonhkt wrote:
    > Hi All
    >
    > About our system
    > AIX 5.2
    > Memory : 8GB
    > pageing Space is 3GB.
    >
    > Why the % using paging space is not high ? less than 30% ?
    >
    > Topas Monitor for host: * *sh * * * * * * * * EVENTS/QUEUES * *FILE/
    > TTY
    > Fri Apr 18 11:44:39 2008 * Interval: *5 * * * * Cswitch * *1665
    > Readch * *22.0M
    > * * * * * * * * * * * * * * * * * * * * * * * * Syscall * 72941
    > Writech * 20.4M
    > Kernel * 22.2 * |####### * * * * * * * * * * | *Reads * * 21026
    > Rawin * * * 117
    > User * * 73.2 * |##################### * * * | *Writes * *42368
    > Ttyout * *36440
    > Wait * * *2.6 * |# * * * * * * * * * * * ** | *Forks * * * * 4
    > Igets * * * * 7
    > Idle * * *2.0 * |# * * * * * * * * * * * ** | *Execs * * * * 8
    > Namei * * *3200
    > * * * * * * * * * * * * * * * * * * * * * * * * Runqueue * *9.4
    > Dirblk * * 2748
    > Network *KBPS * I-Pack *O-Pack * KB-In *KB-Out *Waitqueue * 3.2
    > en0 * * 147.0 * *351.2 * 336.2 * *79.8 * *67.2
    > lo0 * * * 0.1 * * *1.2 * * 1.2 * * 0.1 * * 0.1 *PAGING
    > MEMORY
    > * * * * * * * * * * * * * * * * * * * * * * * * Faults * * 3196
    > Real,MB * *7692
    > Disk * *Busy% * * KBPS * * TPS KB-Read KB-Writ *Steals * * *428 *%
    > Comp * * 60.9
    > hdisk4 * 89.2 *21010.4 * 602.8 *1273.6 19736.8 *PgspIn * * * 19 *%
    > Noncomp *40.0
    > hdisk0 * 38.4 * *341.9 * *73.4 * *75.2 * 266.7 *PgspOut * * *26 *%
    > Client * *1.0
    > hdisk1 * 34.6 * *269.1 * *55.4 * * 3.2 * 265.9 *PageIn * * *338
    > hdisk3 * *0.0 * * *0.0 * * 0.0 * * 0.0 * * 0.0 *PageOut * *4975
    > PAGING SPACE
    > * * * * * * * * * * * * * * * * * * * * * * * * Sios * * * 1572
    > Size,MB * *3072
    >
    > 2008/04/16,04:00:04,Users,25,paging space,3072MB,12%
    > 2008/04/16,04:30:03,Users,37,paging space,3072MB,13%
    > 2008/04/16,05:00:05,Users,38,paging space,3072MB,12%
    > 2008/04/16,05:30:00,Users,40,paging space,3072MB,12%
    > 2008/04/16,06:00:01,Users,41,paging space,3072MB,12%
    > 2008/04/16,06:30:00,Users,45,paging space,3072MB,12%
    > 2008/04/16,07:00:11,Users,46,paging space,3072MB,12%
    > 2008/04/16,07:30:08,Users,50,paging space,3072MB,12%
    > 2008/04/16,08:00:01,Users,51,paging space,3072MB,12%
    > 2008/04/16,08:30:05,Users,94,paging space,3072MB,13%
    > 2008/04/16,09:00:03,Users,374,paging space,3072MB,13%
    > 2008/04/16,09:30:03,Users,519,paging space,3072MB,14%
    > 2008/04/16,10:00:01,Users,585,paging space,3072MB,15%
    > 2008/04/16,10:30:04,Users,626,paging space,3072MB,19%
    > 2008/04/16,11:00:00,Users,668,paging space,3072MB,20%
    > 2008/04/16,11:30:06,Users,674,paging space,3072MB,22%
    > 2008/04/16,12:00:03,Users,685,paging space,3072MB,23%
    > 2008/04/16,12:30:06,Users,658,paging space,3072MB,24%
    > 2008/04/16,13:00:05,Users,635,paging space,3072MB,24%
    > 2008/04/16,13:30:00,Users,643,paging space,3072MB,23%
    > 2008/04/16,14:00:04,Users,664,paging space,3072MB,24%
    > 2008/04/16,14:30:11,Users,667,paging space,3072MB,24%
    > 2008/04/16,15:00:01,Users,679,paging space,3072MB,24%
    > 2008/04/16,15:30:05,Users,686,paging space,3072MB,25%
    > 2008/04/16,16:00:07,Users,684,paging space,3072MB,26%
    > 2008/04/16,16:30:04,Users,675,paging space,3072MB,26%
    > 2008/04/16,17:00:08,Users,685,paging space,3072MB,27%
    > 2008/04/16,17:30:01,Users,586,paging space,3072MB,25%
    > 2008/04/16,18:00:00,Users,371,paging space,3072MB,22%
    > 2008/04/16,18:30:04,Users,333,paging space,3072MB,22%
    > 2008/04/16,19:00:01,Users,293,paging space,3072MB,20%
    > 2008/04/16,19:30:01,Users,271,paging space,3072MB,20%
    > 2008/04/16,20:00:00,Users,239,paging space,3072MB,19%
    > 2008/04/16,20:30:01,Users,205,paging space,3072MB,19%
    > 2008/04/16,21:00:03,Users,172,paging space,3072MB,19%
    > 2008/04/16,21:30:02,Users,165,paging space,3072MB,19%
    > 2008/04/16,22:00:00,Users,151,paging space,3072MB,19%
    > 2008/04/16,22:30:01,Users,139,paging space,3072MB,18%
    > 2008/04/16,23:00:01,Users,135,paging space,3072MB,17%
    > 2008/04/16,23:30:00,Users,130,paging space,3072MB,17%


    Because it doesnt need to use anymore than that.

    Scott

  3. Re: About Paging Space

    On 4月18日, 下午11時21分, scott wrote:
    > On 18 Apr, 04:45, moonhkt wrote:
    >
    >
    >
    >
    >
    > > Hi All

    >
    > > About our system
    > > AIX 5.2
    > > Memory : 8GB
    > > pageing Space is 3GB.

    >
    > > Why the % using paging space is not high ? less than 30% ?

    >
    > > Topas Monitor for host: sh EVENTS/QUEUES FILE/
    > > TTY
    > > Fri Apr 18 11:44:39 2008 Interval: 5 Cswitch 1665
    > > Readch 22.0M
    > > Syscall 72941
    > > Writech 20.4M
    > > Kernel 22.2 |####### | Reads 21026
    > > Rawin 117
    > > User 73.2 |##################### | Writes 42368
    > > Ttyout 36440
    > > Wait 2.6 |# | Forks 4
    > > Igets 7
    > > Idle 2.0 |# | Execs 8
    > > Namei 3200
    > > Runqueue 9.4
    > > Dirblk 2748
    > > Network KBPS I-Pack O-Pack KB-In KB-Out Waitqueue 3.2
    > > en0 147.0 351.2 336.2 79.8 67.2
    > > lo0 0.1 1.2 1.2 0.1 0.1 PAGING
    > > MEMORY
    > > Faults 3196
    > > Real,MB 7692
    > > Disk Busy% KBPS TPS KB-Read KB-Writ Steals 428 %
    > > Comp 60.9
    > > hdisk4 89.2 21010.4 602.8 1273.6 19736.8 PgspIn 19 %
    > > Noncomp 40.0
    > > hdisk0 38.4 341.9 73.4 75.2 266.7 PgspOut 26 %
    > > Client 1.0
    > > hdisk1 34.6 269.1 55.4 3.2 265.9 PageIn 338
    > > hdisk3 0.0 0.0 0.0 0.0 0.0 PageOut 4975
    > > PAGING SPACE
    > > Sios 1572
    > > Size,MB 3072

    >
    > > 2008/04/16,04:00:04,Users,25,paging space,3072MB,12%
    > > 2008/04/16,04:30:03,Users,37,paging space,3072MB,13%
    > > 2008/04/16,05:00:05,Users,38,paging space,3072MB,12%
    > > 2008/04/16,05:30:00,Users,40,paging space,3072MB,12%
    > > 2008/04/16,06:00:01,Users,41,paging space,3072MB,12%
    > > 2008/04/16,06:30:00,Users,45,paging space,3072MB,12%
    > > 2008/04/16,07:00:11,Users,46,paging space,3072MB,12%
    > > 2008/04/16,07:30:08,Users,50,paging space,3072MB,12%
    > > 2008/04/16,08:00:01,Users,51,paging space,3072MB,12%
    > > 2008/04/16,08:30:05,Users,94,paging space,3072MB,13%
    > > 2008/04/16,09:00:03,Users,374,paging space,3072MB,13%
    > > 2008/04/16,09:30:03,Users,519,paging space,3072MB,14%
    > > 2008/04/16,10:00:01,Users,585,paging space,3072MB,15%
    > > 2008/04/16,10:30:04,Users,626,paging space,3072MB,19%
    > > 2008/04/16,11:00:00,Users,668,paging space,3072MB,20%
    > > 2008/04/16,11:30:06,Users,674,paging space,3072MB,22%
    > > 2008/04/16,12:00:03,Users,685,paging space,3072MB,23%
    > > 2008/04/16,12:30:06,Users,658,paging space,3072MB,24%
    > > 2008/04/16,13:00:05,Users,635,paging space,3072MB,24%
    > > 2008/04/16,13:30:00,Users,643,paging space,3072MB,23%
    > > 2008/04/16,14:00:04,Users,664,paging space,3072MB,24%
    > > 2008/04/16,14:30:11,Users,667,paging space,3072MB,24%
    > > 2008/04/16,15:00:01,Users,679,paging space,3072MB,24%
    > > 2008/04/16,15:30:05,Users,686,paging space,3072MB,25%
    > > 2008/04/16,16:00:07,Users,684,paging space,3072MB,26%
    > > 2008/04/16,16:30:04,Users,675,paging space,3072MB,26%
    > > 2008/04/16,17:00:08,Users,685,paging space,3072MB,27%
    > > 2008/04/16,17:30:01,Users,586,paging space,3072MB,25%
    > > 2008/04/16,18:00:00,Users,371,paging space,3072MB,22%
    > > 2008/04/16,18:30:04,Users,333,paging space,3072MB,22%
    > > 2008/04/16,19:00:01,Users,293,paging space,3072MB,20%
    > > 2008/04/16,19:30:01,Users,271,paging space,3072MB,20%
    > > 2008/04/16,20:00:00,Users,239,paging space,3072MB,19%
    > > 2008/04/16,20:30:01,Users,205,paging space,3072MB,19%
    > > 2008/04/16,21:00:03,Users,172,paging space,3072MB,19%
    > > 2008/04/16,21:30:02,Users,165,paging space,3072MB,19%
    > > 2008/04/16,22:00:00,Users,151,paging space,3072MB,19%
    > > 2008/04/16,22:30:01,Users,139,paging space,3072MB,18%
    > > 2008/04/16,23:00:01,Users,135,paging space,3072MB,17%
    > > 2008/04/16,23:30:00,Users,130,paging space,3072MB,17%

    >
    > Because it doesnt need to use anymore than that.
    >
    > Scott- 隱藏被引用文字 -
    >
    > - 顯示被引用文字 -


    Below is our memory report vmstat -s, Does our system busy with
    Paging ?

    Date/Time Page in Page Out PS in PS Out
    Pend IO Wai Syscalls
    =================== =========== =========== =========== ===========
    =========== ===========
    2008/04/22_09:30:17 455015189 417426508 10894769 17093920
    127142456 23068015651
    2008/04/22_09:30:37 455020096 417428905 10895032 17094296
    127146242 23068685432
    2008/04/22_09:30:57 455025229 417434944 10895710 17095716
    127150163 23069252129
    2008/04/22_09:31:18 455028098 417436317 10896194 17095796
    127152379 23069710204
    2008/04/22_09:31:38 455029322 417437670 10896391 17096092
    127153160 23070002793
    2008/04/22_09:31:58 455029892 417438638 10896413 17096118
    127153646 23070456537
    2008/04/22_09:32:18 455031888 417439911 10896723 17096511
    127155390 23070912139
    2008/04/22_09:32:38 455035133 417443273 10896969 17096852
    127158104 23071286256
    2008/04/22_09:32:58 455040914 417445680 10897284 17097343
    127162521 23071706581
    2008/04/22_09:33:18 455049376 417448322 10897983 17098258
    127168668 23072260210
    2008/04/22_09:33:39 455057913 417450769 10898270 17098705
    127171661 23072635782

    Reported by
    vmstat -s |\
    awk -v VTIME=`date "+%Y/%m/%d_%H:%M:%S"` '
    {
    SP = substr($0,23,50)
    VAL = substr($0,0,22)
    if (SP == "page ins") {
    PAGEINS=substr($0,11,11)
    }
    else if (SP == "page outs") {
    PAGEOUT=substr($0,11,11)
    }
    else if (SP == "paging space page ins") {
    PSIN=substr($0,11,11)
    }
    else if (SP == "paging space page outs") {
    PSOUT=substr($0,11,11)
    }
    else if (SP == "pending I/O waits" ) {
    PENDIO=substr($0,11,11)
    }
    else if (SP == "syscalls") {
    SYSCALL=substr($0,11,11)
    }
    }
    END {

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