IDS Forum

Re: spin locks

Posted By: david@smooth1.co.uk
Date: Thursday, 28 August 2014, at 6:20 a.m.

In Response To: Re: spin locks (Marco Greco)

Added to FAQ.

Regards,
David.

> On 21 September 2013 at 11:00 Marco Greco <marco@4glworks.com> wrote:
>
>
> On 20/09/13 21:56, BillHatVerizon wrote:
> > This is the output of onstat g spi .
> > What is po_lock below?
> > Do the numbers look high or is it not possible to answer without more info ?
> > This is on Windows server 2008 R2 SP1.
> >
> > IBM Informix Dynamic Server Version 12.10.TC1IE -- On-Line -- Up 09:04:41 --
> > 733952 Kbytes
> >
> > Spin locks with waits:
> > Num Waits Num Loops Avg Loop/Wait Name
> > 1 88 88.00 mutex lock, name = AIOreq
> > 2 31 15.50 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 121 121.00 mutex lock, name = AIOreq
> > 1 102 102.00 mutex lock, name = AIOreq
> > 1 38 38.00 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 110 110.00 mutex lock, name = AIOreq
> > 1 155 155.00 mutex lock, name = AIOreq
> > 1 203 203.00 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 28 28.00 mutex lock, name = AIOreq
> > 2 102 51.00 mutex lock, name = AIOreq
> > 1 14 14.00 mutex lock, name = AIOreq
> > 1 80 80.00 mutex lock, name = AIOreq
> > 2 63 31.50 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 68 68.00 mutex lock, name = AIOreq
> > 1 116 116.00 mutex lock, name = AIOreq
> > 1 19 19.00 mutex lock, name = AIOreq
> > 1 160 160.00 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 1 170 170.00 mutex lock, name = AIOreq
> > 1 48 48.00 mutex lock, name = AIOreq
> > 1 24 24.00 mutex lock, name = AIOreq
> > 1 68 68.00 mutex lock, name = AIOreq
> > 2 134 67.00 mutex lock, name = AIOreq
> > 2 183 91.50 mutex lock, name = AIOreq
> > 1 49 49.00 mutex lock, name = AIOreq
> > 3 284 94.67 mutex lock, name = AIOreq
> > 1 6 6.00 mutex lock, name = AIOreq
> > 1 58 58.00 mutex lock, name = AIOreq
> > 1 1 1.00 mutex lock, name = AIOreq
> > 2 135 67.50 mutex lock, name = AIOreq
> > 2 49 24.50 mutex lock, name = AIOreq
> > 1 61 61.00 mutex lock, name = AIOreq
> > 1 10 10.00 mutex lock, name = AIOreq
> > 4 759 189.75 shmcb sh_lock
> > 118 60205 510.21 pool po_lock, name = global
> >
> >
> >
> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> Bill, po_lock is a spin lock used for low level memory management, and those
> numbers don't look high, so I would not be concerned.
> --
> Ciao,
> Marco
> ______________________________________________________________________________
> Marco Greco /UK /IBM Standard disclaimers apply!
>
> Structured Query Scripting Language http://www.4glworks.com/sqsl.htm
> 4glworks http://www.4glworks.com
> Informix on Linux http://www.4glworks.com/ifmxlinux.htm
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>

Messages In This Thread

• spin locks
  BillHatVerizon -- Friday, 20 September 2013, at 4:56 p.m.
  • Re: spin locks
    Marco Greco -- Saturday, 21 September 2013, at 6:00 a.m.
    • Re: spin locks
      david@smooth1.co.uk -- Thursday, 28 August 2014, at 6:20 a.m.
  • Re: spin locks
    Art Kagel -- Saturday, 21 September 2013, at 9:20 p.m.
    • Re: spin locks
      Hrvoje Zokovic -- Monday, 23 September 2013, at 3:02 a.m.
      • Re: spin locks
        Art Kagel -- Monday, 23 September 2013, at 12:04 p.m.
        • Re: spin locks
          John Miller iii -- Monday, 23 September 2013, at 1:47 p.m.
          • Re: spin locks
            david@smooth1.co.uk -- Monday, 23 September 2013, at 3:44 p.m.
            • Re: spin locks
              John Miller iii -- Monday, 23 September 2013, at 5:52 p.m.
              • Re: spin locks
                david@smooth1.co.uk -- Thursday, 28 August 2014, at 6:22 a.m.
            • Re: spin locks
              Art Kagel -- Monday, 23 September 2013, at 9:23 p.m.
          • Re: spin locks
            david@smooth1.co.uk -- Thursday, 28 August 2014, at 6:21 a.m.
        • Re: spin locks
          BillHatVerizon -- Monday, 23 September 2013, at 5:50 p.m.
    • Re: spin locks
      david@smooth1.co.uk -- Thursday, 28 August 2014, at 6:21 a.m.

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