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Full Discussion: j2_maxPageReadAhead & j2_nBufferPerPagerDevice and CIO
Top Forums UNIX for Advanced & Expert Users j2_maxPageReadAhead & j2_nBufferPerPagerDevice and CIO Post 302231796 by hariza on Wednesday 3rd of September 2008 07:14:28 AM
Old 09-03-2008
j2_maxPageReadAhead & j2_nBufferPerPagerDevice and CIO
Hi Guys,

At the moment I'm experiencing a problem where one of the filesystems is being locked up because it looks like is running out of buffers and according to IBM a workaround should be decreasing the size of the
j2_maxPageReadAhead. My question is what if I turn on CIO at the filesystem level . I wonder whether enabling CIO then will bypass all these filesystems buffers such as j2_nBufferPerPagerDevice and j2_nBufferPerPagerDevice . Any thoughts?. Actually I forget to mention this is on AIX 5.3.

Harby.
 

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LEARN ABOUT LINUX

local-filesystems

local-filesystems(7)					 Miscellaneous Information Manual				      local-filesystems(7)

NAME

       local-filesystems - event signalling that local filesystems have been mounted

SYNOPSIS

       local-filesystems [ENV]...

DESCRIPTION

       The  local-filesystems  event  is generated by the mountall(8) daemon after it has mounted all local filesystems listed in fstab(5).  moun-
       tall(8) emits this event as an informational signal, services and tasks started or stopped by this event will do so in parallel with  other
       activity.

       This event is typically used by services that must be started in order for remote filesystems, if any, to be activated.	Remember that some
       users may not consider it wrong to place /usr on a remote filesystem.  For most normal services the filesystem(7) event is sufficient.

       This event will never occur before the virtual-filesystems(7) event.

EXAMPLE

       A service that wishes to be running once local filesystems are mounted might use:

	      start on local-filesystems

SEE ALSO

       mounting(7) mounted(7) virtual-filesystems(7) remote-filesystems(7) all-swaps(7) filesystem(7)

mountall							    2009-12-21						      local-filesystems(7)
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