Powerhouse Quiz takes 60%+ CPU in EXEC mode

[Hamilton, Allison]

I can't remember what happens to VMS when the disk hits 80-90% - but I know
that it seriously bogs down the system when the disk is heavily accessed.
Our system manager now won't let us get above 80% (he doesn't give out
quotas over that), but before he set those limits we had some interesting
CPU loads from some 90% full disks.  Perhaps someone on the VMS side will be
able to expand on the reasons why.
Allison Hamilton

> ----------
> From: 	Chris Sharman[SMTP:Chris.Sharman@ccagroup.co.uk]
> Sent: 	Wednesday, February 24, 1999 9:47 AM
> To: 	Allison.Hamilton@Cognos.COM
> Cc: 	Chris.Sharman@ccagroup.co.uk; powerh-l@lists.swau.edu
> Subject: 	RE: Powerhouse Quiz takes 60%+ CPU in EXEC mode
> 
> >If your files are poorly optimized,
> 
> We do optimise data files every weekend.
> $ analyze/rms/fdl <file>
> $ edit/fdl/nointeractive/granularity=double/analysis=<fdl> <fdl>
> $ convert/fdl=<fdl>/nosort <file> <temp>
> $ rename <temp> <file>
> Do it to the dictionaries once in a while (they're indexed files too).
> So the files should be optimized.
> 
> >or quite fragmented,
> 
> We use a defragger (the Digital one) every night.
> The disks aren't fragmented. The files in question aren't fragmented.
> 
> >or your disk close to full
> 
> The disks are full-ish (70-90%), but I don't see that that's a problem in
> itself,  it just tends to lead to fragmentation - not a problem for large
> pre-allocated files.
> 
> So I'm still in the dark, unless the (Digital) supplied optimization still
> results in some sort of RMS thrashing, or fullish disks have some impact
> I'm
> unaware of.
> A colleague thinks he's seen this from a 3GL program too. If that's the
> case
> Powerhouse is probably exonerated (I've already cross-posted to
> comp.os.vms,
> I'll relay anything interesting here).
> 
> Thanks very much for the suggestions.
> Chris
> ______________________________________________________________________
> Chris Sharman			Chris.Sharman@CCAgroup.co.uk
> CCA Stationery Ltd, Eastway, Fulwood, Preston, Lancashire, PR2 9WS.
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