topic Re: process or global section table is full in Operating System - OpenVMS

process or global section table is full

TMcB — Mon, 14 Apr 2008 10:45:01 GMT

Hi everyone.
Looking for some advice, as users are getting error message :
File "GRP" Filename "MT$IV:[DAT]GROUP.DAT;1"
-RMS-F-CRMP, CRMPSC system service failed to map global buffers
-SYSTEM-F-SECTBLFUL, process or global section table is full
%TRACE-F-TRACEBACK, symbolic stack dump follows
image module routine line rel PC abs PC
PAS$RTL 0 00000000000200BC 000000007BFEE0BC
PAS$RTL 0 0000000000037AD8 000000007C005AD8
PAS$RTL 0 0000000000022AC4 000000007BFF0AC4
PAS$RTL 0 00000000000200BC 000000007BFEE0BC
PAS$RTL 0 0000000000021684 000000007BFEF684
SHRC06 FIO_GRP GRP_OPEN 22 000000000000098C 000000000020E58C
SHRC06 FIO_GRP 153 000000000020E58C 0000000000000000
SHRC06 0 00000000003670A8 00000000003670A8
0 FFFFFFFF8037BCE4 FFFFFFFF8037BCE4
%TRACE-I-END, end of TRACE stack dump

Can anyone advise what this could be.
Thanks

Re: process or global section table is full

Volker Halle — Mon, 14 Apr 2008 10:57:10 GMT

TMcB,

your application tried to open a file with RMS. RMS failed to create or map a global section associated with this file, because there are insufficient system resources available, most likely:

- GBLSECTIONS
- GBLPAGES
- GBLPAGFIL

The RMS file to be opened probably has global buffers enabled or file statistics.

Is this a new oproblem ? Did someone change the attributes of this file ?

Volker.

Re: process or global section table is full

Volker Halle — Mon, 14 Apr 2008 11:09:18 GMT

You can find out the related data for those GBL* resources with:

$ INSTALL LIST/GLO/SUMM

xxx Global Sections Used, yyy/zzz Global Pagelets Used/Unused

Total no. of GBLSECTIONS available:
$ WRITE SYS$OUTPUT F$GETSYI("GBLSECTIONS")

$ ANAL/SYS
SDA> CLUE MEM/STAT ! last line of display
...
Global Pagefile Quota xxx GBLPAGFIL (SYSGEN) Limit yyy

You or your system manager need to increase the appropriate resource. GBLSECTIONS is not a dynamic parameter and would require a reboot, the others can be increased dynamically.

Volker.

Re: process or global section table is full

labadie_1 — Mon, 14 Apr 2008 11:38:22 GMT

A minor correction to what Volker said: check the GBLPAGES really available with

$ write sys$output f$getsyi("contig_gblpages")

Usually this value is just a little smaller than the value listed by
$ install lis/glo/sum

I had posted long ago a program to monitor gblpagfil usage, as you can see the actual value, not the lowest value since the boot.

______________

#include
#include
#include
#include
#include

int Mingb = 0;
$DESCRIPTOR(TblNameD, "LNM$SYSTEM_TABLE");
$DESCRIPTOR(LogNameD, "MIN_GBLPAGFIL");
char Value[32];
$DESCRIPTOR(LogValD, Value);

globalref int mmg$gl_gblpagfil;

main() {
int s;

Mingb = mmg$gl_gblpagfil + 1000;
for (;;) {
if (Mingb > mmg$gl_gblpagfil) {
Mingb = mmg$gl_gblpagfil;
sprintf(Value, "%d", Mingb);
LogValD.dsc$w_length = strlen(Value);
s = lib$set_logical(&LogNameD, &LogValD, &TblNameD);
if (! $VMS_STATUS_SUCCESS(s)) exit(s);
}
sleep(60);
}

________

replace 60 with a lower value to check more often.

Re: process or global section table is full

TMcB — Mon, 14 Apr 2008 13:11:39 GMT

Thanks everyone for getting back to me.
When I check out the settings -

INSTALL LIST/GLO/SUMM :
1511 Global Sections Used, 814288/2,600,048 Global Pagelets Used/Unused 1500 glob sect avail.

sda > clue mem
Global Pagefile Quota 159,971 GBLPAGFIL (SYSGEN) Limit 197,632

Re: process or global section table is full

Volker Halle — Mon, 14 Apr 2008 13:20:55 GMT

1511 Global Sections Used
1500 glob sect avail.

How do I have to understand the 2nd line ? Which command did you use ?

If $ MC SYSGEN SHOW GBLSECTIONS shows 1500, then you've run out of GBLSECTIONS and you need to increase that parameter and reboot.

Volker.

Re: process or global section table is full

TMcB — Mon, 14 Apr 2008 13:46:31 GMT

Sorry Volkerâ

INSTALL LIST/GLO/SUMM shows :
1511 Global Sections Used, 814704/2599632 Global Pagelets Used/Unused

and :
WRITE SYS$OUTPUT F$GETSYI("GBLSECTIONS")
Gave the 1500 global sections available.

MTXAL6> MC SYSGEN SHOW GBLSECTIONS
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
GBLSECTIONS 1500 1024 80 65535 Sections

Does this mean I have to increase GBLSECTIONS and reboot?
How do I know what to increase it to?

Thanks

Re: process or global section table is full

Volker Halle — Mon, 14 Apr 2008 13:51:13 GMT

Add MIN_GBLSECTIONS=2000 to SYS$SYSTEM:MODPARAMS.DAT, then run @SYS$UPDATE:AUTOGEN SAVPARAMS SETPARAMS FEEDBACK

Check SYS$SYSTEM:AGEN$PARAMS.REPORT for changes done by autogen and possible error messages. If everything seems o.k. then reboot.

The 'overhead' for speciyinf 'too many global sections' is negligible.

Volker.

Re: process or global section table is full

TMcB — Mon, 14 Apr 2008 14:05:54 GMT

thanks so much

Re: process or global section table is full

Wim Van den Wyngaert — Mon, 14 Apr 2008 14:26:47 GMT

I would also check install list/glob to see if there is no garbage present. Things that were installed while not/no longer needed.

Wim