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Conference mvblab::alphaserver_4100

Title:AlphaServer 4100
Moderator:MOVMON::DAVISS
Created:Tue Apr 16 1996
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:648
Total number of notes:3158

586.0. "How to do some unix tuning !" by HGOM19::WILSONLU () Sun May 04 1997 04:20

    Hi,
    
       We will do benchmark for one of our customers. We are using 
    Alphaserver 4100 5/400, the configuration is :
         Digital UNIX 4.0B, 
         One ALPHA 5/400 CPU with 4M Cache, 
         512M ram, 
         two rz28-vw hard disks (one as system disk, one as swap disk),
         using kzpsc-xb with six rz29-vw disks to do raid 0+1.
        We will use ORACLE to do the benchmark with twenty users.
       I know  how to do ORACLE performance tuning , but could you give
    me some advise about how to do unix tuning ?
       Thanks in advance !
    
    Regards,
    
    Wilson Lu
T.RTitleUserPersonal
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586.1There is a tuning guide in the docset...PERFOM::HENNINGTue May 06 1997 10:149
    In order from most important to least important:
    
    step 1.  Determine whether you have a CPU bottleneck, IO bottleneck, or
             memory bottleneck.  (For example, say "vmstat 3" and "iostat 5")
    
    step 2.  Do the Oracle tuning that you already know how to do.
    
    step 3.  Read the fine manual: System Tuning and Performance Management
             and consider whether you really want to do Unix tuning...
586.2Not so simple...NNTPD::"[email protected]"Dave CherkusTue May 06 1997 10:1815
It's not the kind of thing one can just pick up in a few minutes.

Digital UNIX has a system performance / tuning manual in the document
set.  Perhaps you should read that?  

Also I believe Digital's education offerings cover this topic as well.

But, one thing I can say is if you really do have two disks, you
should consider having equally-sized swap partitions on each disk.
Use the first to hold / and /usr, and the second to hold user data,
and put a swap partition on each disk.  This will allow the system
to have two spindles to swap to, which in general improves performance.

Dave
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