increase global sections

[Sjors Takes]

Hi all

For new s/w 190 global sections are required, but:

$write sys$output f$getsyi("free_gblsects")
163

I have modified modparams.dat:

MIN_GBLSECTIONS = 1200 (was 625)

After that I ran Autogen:

$@SYS$UPDATE:AUTOGEN GETDATA SETPARAMS

After a reboot, the free global sections were still 163. Why didn't this number increase?

Thanks in advance. Greetings, Sjors

[Wim Van den Wyngaert · Accepted solution]

Do your autogen again or check the output of the previous run. Sometimes autogen finds something suspiscious and cancels the setparams. You need to do the set params as

@SYS$UPDATE:AUTOGEN SETPARAMS

Wim

[Jim_McKinney]

> Why didn't this number increase?

You only show what is free - not how many sections are SYSGENed. It is probable that the actual number of global sections was/is greater than 1200.

You'll want to get the current GBLSECTIONS value

$ write sys$output f$gets("gblsections")

and then increase your MIN_GBLSECTIONS value above that number.

[Peter Zeiszler]

Check the SYS$SYSTEM:AGEN$PARAMS.REPORT and see what it has reports for the GBLSECTIONS value.

[Steven Schweda]

ALP $ type SYS$MANAGER:GBL.COM
$ G = F$GETSYI( "GBLPAGES")
$ GF = F$GETSYI( "FREE_GBLPAGES")
$ GC = F$GETSYI( "CONTIG_GBLPAGES")
$ WRITE SYS$OUTPUT -
" Global pages: ''g', free: ''gf', contiguous: ''gc'."
$ G = F$GETSYI( "GBLSECTIONS")
$ GF = F$GETSYI( "FREE_GBLSECTS")
$ WRITE SYS$OUTPUT -
" Global sections: ''g', free: ''gf'."


ALP $ @ gbl.com
Global pages: 3679322, free: 3248256, contiguous: 3232992.
Global sections: 1350, free: 258.

[Robert_Boyd]

Sjors,

You might download SHOW_NODE_INFO.COM from

http://dcl.openvms.org/stories.php?story=05/04/04/7482362

There is a section of information about global pages and global sections that is part of the output.

Robert

[Daniel Fernandez Illan]

Sjors

Are you display file SYS$SYSTEM:AGEN$PARAMS.REPORT
to check some error message about MODPARAMS.DAT lines?
It is possible, if line refer to MIN_GBLSECTIONS is EXACTLY
MIN_GBLSECTIONS = 1200 (was 625)
that AUTOGEN has detected an error.

Line will be:

MIN_GBLSECTIONS = 1200 ! (was 625)

(See comment ! character)

Saludos.
Daniel.

[Sjors Takes]

Thanks all.
@SYS$UPDATE:AUTOGEN GENPARAMS SETPARAMS FEEDBACK
Did the job.

Greets, Sjors

[John Gillings]

Sjors,

>For new s/w 190 global sections are required, but:
>
>$write sys$output f$getsyi("free_gblsects")
163
>
>I have modified modparams.dat:
>
>MIN_GBLSECTIONS = 1200 (was 625)

The intended way to deal with this situation is in MODPARAMS.DAT:

ADD_GBLSECTIONS = 190 ! For product "new s/w"

Hopefully, each product with a specific requirement for GBLSECTIONS will have its own line and comment.

[Thomas Ritter]

Sjors, some advice.
When changing system parameters and before rebooting use $ difference/parall to compare the before and after differences in parameters.
This very simple technique will save you.
Consider
+++
$ mc sysgen
use sys$system:alphavmssys.par !Real Version
set/output=users:[autogen]wiza_new_params.txt
show/all
show/special
!!!use sys$system:alphavmssys.old !Previous version
use users:[autogen]wiza_PARAMS_CURRENT.PAR
set/output=users:[sautogen]wiza_old_params.txt
show/all
show/special
exit
$
$differences/parallel/out=differences.lis wiza_new_params.txt wiza_old_params.txt
$type/p differences.lis
$exit
___
Also these days with gigabytes of RAM think big, but not too big. There is very little overhead in having some parameters configured generously.

We have not autogen our production cluster for over 2 years and work load has increased three fold ! Once you know your work mix and expected growth adjust
accordingly.

My AUS 2 cents.