[Ocfs2-users] Linux-x86_64 Error: 4: Interrupted system call

[Luis Freitas]

Daniel,

   There is a note on Metalink saying this error could be related to /proc/sys/fs/aio-max-nr. If you have not tuned this parameter, try increasing it to 1048576, or more if needed. You will have to look on /proc/sys/fs/aio-nr to see if you are hitting the current limit.

Regards.

--- On Thu, 8/14/08, Daniel Keisling <daniel.keisling at austin.ppdi.com> wrote:
From: Daniel Keisling <daniel.keisling at austin.ppdi.com>
Subject: RE: [Ocfs2-users] Linux-x86_64 Error: 4: Interrupted system call
To: lfreitas34 at yahoo.com, ocfs2-users at oss.oracle.com
Date: Thursday, August 14, 2008, 5:50 PM



 

It is set to 8.



From: Luis Freitas [mailto:lfreitas34 at yahoo.com] 

Sent: Thursday, August 14, 2008 3:46 PM
To: 
ocfs2-users at oss.oracle.com; Daniel Keisling
Subject: Re: [Ocfs2-users] 
Linux-x86_64 Error: 4: Interrupted system call




  
  
    Daniel,

    What do you have on 
      db_file_multiblock_read_count on the problem 
      database?

Regards,
Luis

--- On Thu, 8/14/08, Daniel 
      Keisling <daniel.keisling at austin.ppdi.com> wrote:

      From: 
        Daniel Keisling <daniel.keisling at austin.ppdi.com>
Subject: 
        [Ocfs2-users] Linux-x86_64 Error: 4: Interrupted system call
To: 
        ocfs2-users at oss.oracle.com
Date: Thursday, August 14, 2008, 2:52 
        PM


        
        Greetings,
         
        When 
        attempting to start up a database on an OCFS2 filesystem, Oracle 
        complains with the following errors:
         
         
        ORA-27090: 
        Message 27090 not found;  product=RDBMS; 
        facility=ORA
        Linux-x86_64 
        Error: 4: Interrupted system call
        Additional 
        information: 3
        Additional 
        information: 128
        Additional 
        information: 65536
        *** 
        2008-08-12 14:02:01.304
        Warning: OS 
        async I/O limit 128 is lower than recovery batch 
1024
         
         
        Searching 
        for 'interrupted system call" seems to suggest that filesystem is not 
        mounted with the nointr option, but it is:
         
        /dev/sdg1 on 
        /var/opt/oracle/oradata/ph1p type ocfs2 
        (rw,_netdev,datavolume,nointr,heartbeat=local)
         
         
        I have no 
        idea about the async I/O limit.  I know that this kernel paramater 
        is no longer tunable in 2.6 kernels.
         
        I have a 
        dozen or so databases on another filesystems and on other machines, none 
        of which exhibit this behavior.  Does anyone know why it complains 
        of an 'interrupted system call' and I/O limits for this filesystem 
        and/or if they pose a problem?
         
        Kernel is 
        2.6.18-53.el5 #1 SMP Wed Oct 10 16:34:19 EDT 2007 x86_64 x86_64 x86_64 
        GNU/Linux
        Under Red 
        Hat v5.1 with ocfs2-2.6.18-53.el5-1.2.8-2.el5.
         
        TIA,
         
        Daniel
         
         


        
          
          
            

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