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Conference vaxaxp::vmsnotes

Title:VAX and Alpha VMS
Notice:This is a new VMSnotes, please read note 2.1
Moderator:VAXAXP::BERNARDO
Created:Wed Jan 22 1997
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:703
Total number of notes:3722

410.0. "Pagefile on strip set" by HGOVC::PATRICKNG () Wed Apr 02 1997 06:39

    Hi,
    
    What is the pro and con to set up pagefile on a strip-set of 2-3 disk
    for OVMS 6.2 1h3? The AlphaServer 4100 cluster has 4GB memory on each
    member. 
    
    I believe it will improve performance if there is any paging I/O ( on
    the other hand, we try to reduce the hard page fault as much as
    possible)
    
    
    Thanks,
    Patrick 
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410.1It'll Work, Find Bottlenecks First...XDELTA::HOFFMANSteve, OpenVMS EngineeringWed Apr 02 1997 10:5613
    I'd first determine where the performance is being spent, and
    look for indications of where the present limits are...

    I'd add usually add more memory first...  If the configuration is
    maxed out, there's no reason not to move the pagefile to a stripeset,
    but with the understanding that this configuration arguably increases
    the exposure to disk failures.  I'd also look at spreading the
    pagefiles across spindles and I/O channels, as this can also reduce
    "hot-spots" in the system.

    You will be moving the secondary pagefiles only, unless you are using
    a controller-based stripeset...  (Obviously...)