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тАО11-15-2007 02:44 AM
тАО11-15-2007 02:44 AM
Linux buffer cache kernel parameters.
I want to know how to change buffer cache values for RHEL AS 4.0?
Thanks,
Gulam.
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тАО11-15-2007 03:00 AM
тАО11-15-2007 03:00 AM
Re: Linux buffer cache kernel parameters.
http://www.redhat.com/magazine/001nov04/features/vm/
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тАО11-15-2007 04:25 AM
тАО11-15-2007 04:25 AM
Re: Linux buffer cache kernel parameters.
The default for Red Hat Linux is to set the buffer cache to include almost all free memory.
Contrary to HP-UX, there is no severe performance penalty when taking memory out of the buffer cache and giving it to a process.
My advice is to leave this alone.
In my forums profile is a thread on this topic with more data.
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1098585
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО11-15-2007 12:55 PM
тАО11-15-2007 12:55 PM
Re: Linux buffer cache kernel parameters.
dbc_max_pct & dbc_min_pct == HP-UX Specific
Try not mention above HP-UX Parameters in front of your Linux Customer :)
Thanks
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тАО11-15-2007 08:12 PM
тАО11-15-2007 08:12 PM
Re: Linux buffer cache kernel parameters.
yes, linux takes all memory for buffers that are not in use, that's great (for performance)! at least all that memory is used. believe me, if the kernel would need the memory for other things it won't be used up by buffers.
this costs nothing, but you gain a lot. or would you rather have a lot of memory that is not used? why have that much memory in the first place then?
different OS, different rules.