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тАО11-04-2005 07:32 AM
тАО11-04-2005 07:32 AM
Re: wsinc default value
Lawrence
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тАО11-04-2005 09:24 AM
тАО11-04-2005 09:24 AM
Re: wsinc default value
In troubleshooting peformance issues, I've also had HP recommend increasing WSINC up to 16000. This is for an application where most of the system memory is taken up by global sections and does not reflect the traditional "user" other sites see.
Andy
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тАО11-07-2005 03:16 AM
тАО11-07-2005 03:16 AM
Re: wsinc default value
What do you mean with workset.com ?
There is no way to modify the application creating the process.
Wim
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тАО11-07-2005 06:49 AM
тАО11-07-2005 06:49 AM
Re: wsinc default value
1. You didn't specify how the processes are started. If you are creating subprocesses or detached processes, then
you can:
$run (process)/WORKING_SET=wsdefault_value/MAXIMUM_WORKSET=wsquota_value/EXTENT=wsextent_value.
If you are running images, then you're right you can't set these values.
2. Attached is workset.com as workset.txt. It just gives you a measurement of pages in working set, page faults, etc.
Lawrence
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тАО11-16-2005 09:31 PM
тАО11-16-2005 09:31 PM
Re: wsinc default value
$! WORKING_SET.COM - Command file to display working set information.
$! Requires 'WORLD' privilege to display information
$! on processes other than your own.
$!
$! the next symbol is used to insert quotes into command strings
$! because of the way DCL processes quotes, you can't have a
$! trailing comment after the quotes on the next line.
$!
$ quote = """
$!
$ pid = "" ! initialize to blank
$ context = "" ! initialize to blank
$!
$! Define a format control string which will be used with
$! F$FAO to output the information. The width of the
$! string will be set according to the width of the
$! display terminal (the image name is truncated, if needed).
$!
$ IF F$GETDVI ("SYS$OUTPUT", "DEVBUFSIZ") .LE. 80
$ THEN
$ ctrlstring = "!AS!15AS!5AS!7(6SL)!7SL !10AS"
$ ELSE
$ ctrlstring = "!AS!15AS!5AS!7(6SL)!7SL !AS"
$ ENDIF
$!
$! Check to see if this procedure was invoked with the PID of
$! one specific process to check. If it was, use that PID. If
$! not, the procedure will scan for all PIDs where there is
$! sufficient privilege to fetch the information.
$!
$ IF p1 .NES. "" THEN pid = p1
$!
$! write out a header.
$!
$ WRITE sys$output -
" Working Set Information"
$ WRITE sys$output ""
$ WRITE sys$output -
" WS WS WS WS PPG GPG Pages Page"
$ WRITE sys$output -
"Username Processname State Extnt Quota Deflt Size in WS Faults Image"
$ WRITE sys$output ""
$!
$! Begin collecting information.
$!
$ som = 0
$ collect_loop:
$!
$ IF P1 .EQS. "" THEN pid = F$PID (context) ! get this process' PID
$ IF pid .EQS. "" THEN goto fin ! if blank, no more to
$! ! check, or no privilege
$ pid = quote + pid + quote ! enclose in quotes
$!
$ username = F$GETJPI ('pid, "USERNAME") ! retrieve proc. info.
$!
$ IF username .EQS. "" THEN GOTO collect_loop ! if blank, no priv.; try
$! ! next PID
$ processname = F$GETJPI ('pid, "PRCNAM")
$ imagename = F$GETJPI ('pid, "IMAGNAME")
$ imagename = F$PARSE (imagename,,,"NAME") ! separate name from filespec
$ state = F$GETJPI ('pid, "STATE")
$ wsdefault = F$GETJPI ('pid, "DFWSCNT")
$ wsquota = F$GETJPI ('pid, "WSQUOTA")
$ wsextent = F$GETJPI ('pid, "WSEXTENT")
$ wssize = F$GETJPI ('pid, "WSSIZE")
$ globalpages = F$GETJPI ('pid, "GPGCNT")
$ processpages = F$GETJPI ('pid, "PPGCNT")
$ pagefaults = F$GETJPI ('pid, "PAGEFLTS")
$!
$ pages = globalpages + processpages ! add pages together
$ som = som + (pages / 16 )
$!
$! format the information into a text string
$!
$ text = F$FAO (ctrlstring, -
username, processname, state, wsextent, wsquota, wsdefault, wssize, -
processpages, globalpages, pages, pagefaults, imagename)
$!
$ WRITE sys$output text ! display information
$!
$ IF p1 .NES. "" THEN EXIT ! if not invoked for a
$! ! specific PID, we're done.
$ GOTO collect_loop ! repeat for next PID
$fin:
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тАО11-17-2005 01:07 PM
тАО11-17-2005 01:07 PM
Re: wsinc default value
SYSGEN Defaults must support ALL possible OpenVMS systems, from a tiny ancient Alpha workstation up to a fully loaded GS1280. They must therefore be conservative and pessimistic.
I think the minimum supported memory configuration these days is 64MB, which is 8192 pages, so increasing the default WSINC to 24000 is NOT a good idea! 2400 seems quite reasonable to me.
In the case you've described, yes, increasing WSINC may be a reasonable thing to do. That's what AUTOGEN is for. To modify defaults to suit your specific circumstances.
I'd also look at creating your processes with explicit quotas, rather than relying on default PQLs.
(IMHO depending on PQL_D or PQL_Ms is a bug. All processes should have explicit quota list).
Expecting a process to fault it's way up past WSQUOTA from PQL_D values for WSDEFAULT is doing it the hard way. If you know in advance what the processes memory requirements will be, TELL OpenVMS up front, rather than complaining that it takes too long for OpenVMS to work out what you already know.
On the other hand, if the system has plenty of memory, it may not make a huge difference in overall performance, as the pages will probably just cycle between process working set, free list and modified page list.
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тАО11-19-2005 10:27 PM
тАО11-19-2005 10:27 PM
Re: wsinc default value
John : I whished it were my processes. But modifying something like that in an old application is not easy over here. It's not only for avoiding the PF but to avoid the alarm that is given.
Wim
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тАО11-21-2005 08:09 PM
тАО11-21-2005 08:09 PM
Re: wsinc default value
WSSET sizes (in Kp or 16000 pages) :
Before : 6:55 6 Kp, 8:05 14Kp, 10:00 18Kp
After : 6:55 10 Kp, 8:00 20Kp, 8:40 32Kp. No further increase.
So, the working set grew more rapidly but still to slow. There are less pagefaults but still too many (still alarms).
I will try with 100.000 ...
Wim
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тАО01-08-2006 11:56 PM
тАО01-08-2006 11:56 PM
Re: wsinc default value
The problem is solved with 100.000 pages in wsinc.
No problems seen yet. No alarms anymore of high faulting.
Wim
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