IDS Forum

Re: KAIO crash

Posted By: JACQUES RENAUT
Date: Friday, 10 April 2009, at 1:20 p.m.

In Response To: Re: KAIO crash (Obnoxio The Clown)

>Flores, J. Gerardo wrote:
>> No, the release notes not especific a limit.
>>
>> This value was configured by other people, and I don´t know the justification.
>>
>> The value of 4096 was commented in my .profile, but I don't know when and who
>> do it.
>
>The only release notes I can find that refer to that environment
>variable are for 7.31 and they explicitly say that themaximum value is 4096.
>
>Think we need someone with source code access to step in. Or the correct
>release notes. :o)

The max value is 4096, so the release notes are correct. You can set it higher in your env, but the code will just cap it at 4096 anyway. ( As a side note I believe they are going to up this number in newer releases, but in 9.40 it is definately 4096)

The errno 11 out of resource is usually returned because when you went to submit a kaio request all 4096 of the Informix KAIO call back structures were already in use. That error shouldn't be crashing your server, but it certainly could be spamming your online.log file. I'm not a big AIX guy, but it seems like I recall that there was some AIX kernal parameter that controlled a number of AIX kaio demons (or something to that effect) which were the processes that are supposed to be doing the KAIO on the system. I think the AIX parameter might be maxreqs?

Jacques Renaut
IBM/Informix APD team

Messages In This Thread

• KAIO crash
  JULIO FLORES -- Thursday, 9 April 2009, at 12:56 p.m.
  • Re: KAIO crash
    Obnoxio The Clown -- Thursday, 9 April 2009, at 12:58 p.m.
    • Re: KAIO crash
      Obnoxio The Clown -- Thursday, 9 April 2009, at 1:04 p.m.
      • RE: KAIO crash
        Flores, J. Gerardo -- Thursday, 9 April 2009, at 1:15 p.m.
        • Re: KAIO crash
          Obnoxio The Clown -- Thursday, 9 April 2009, at 1:22 p.m.
          • Re: KAIO crash
            JACQUES RENAUT -- Friday, 10 April 2009, at 1:20 p.m.
  • Re: KAIO crash
    Art Kagel -- Saturday, 11 April 2009, at 9:53 p.m.
    • RE: KAIO crash
      Haracz Greg -- Tuesday, 14 April 2009, at 11:56 a.m.
  • RE: KAIO crash
    PROC Tapia La Torre Pedro -- Monday, 13 April 2009, at 4:39 p.m.

IDS Forum is maintained by Administrator with WebBBS 5.12.