Sporadically onstat fails with Cannot attach to shared memory. errno = 22
Hi,
i've the problem that sometimes (random) onstat commands fails with following error:
14:53:31 shmat: [22]: operating system error
14:53:31 Client could not attach server shared memory segment, use IFX_XFER_SHMBASE.
MapViewOfFileEx: w32ec=487 at nt_shm.c:735onstat: Cannot attach to shared memory. errno = 22
Errorlevel returned is 255.
OS:
Server 2019
Informix:
14.10FC5WE
But the problem is accross all server and all informix versions since 14.10.
I've tried it with different SHM settings, but the error apears everytime:
#RESIDENT -1
RESIDENT 0#SHMBASE 0x80000000L
#SHMBASE 0x141460000L
SHMBASE 0x150000000L#SHMVIRTSIZE 6291456
SHMVIRTSIZE 1048576#SHMADD 3145728
SHMADD 204800 #add in 200mb lots
EXTSHMADD 8192
SHMTOTAL 33554432
SHMVIRT_ALLOCSEG 0,3#SHMNOACCESS 0x70000000-0x7FFFFFFF
To reproduce the error you can use this cmd script:
@echo off
set INFORMIXDIR=xxxxx
set INFORMIXSERVER=xxxx:START
onstat.exe - >> onstat.txt 2>&1
echo ErrorLevel: %errorlevel% >> onstat.txt
if %errorlevel% neq 5 exit
GOTO START
Sometimes the onstat is working ~30 times, sometimes ~300 times.
I can't see a system here.
Thanks.
------------------------------
Josef Albert
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#Informix