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IDS Forum

Re: IFX_XFER_SHMBASE

Posted By: BRYCE STENBERG
Date: Monday, 29 February 2016, at 4:15 p.m.

In Response To: Re: IFX_XFER_SHMBASE (BillHatVerizon)

Hi,

We've been using informix workgroup edition on windows for some years now, although currently on server 2012r2. Since the problem just started none of the following may apply, but mention them in case any of it helps.

If you are logged in as the administrator account try logging in with the informix account. If you are logged in as informix try running commands in an elevated command prompt. I've found a few issues with some of the 'on' commands not behaving unless using informix in an elevated command prompt, although onstat normally runs regardless of this. You don't have a mixed case instance name perchance, I've had that affect some 'on' commands also?

Since everything else is running it is probably not memory. Memory related you use to have to set a few things in onconfig file, but most of that is no longer necessary with latest informix, like SHMNOACCESS to exclude memory ranges of the system dll's or other programs. If you've got loads of memory you could set the SHMBASE above the 4GB mark (I think windows dll's hang around just below there) to see if it makes a difference but again should no longer be necessary:
SHMBASE 0x141460000L #around the 5GB mark
(we usually set this base to 0x80000000L although i think the default may be a lot lower).
And for completeness tend to use these settings with success:
SHMVIRTSIZE 1048576 #1GB
SHMADD 204800 #add in 200mb lots
EXTSHMADD 8192
SHMTOTAL 0
SHMVIRT_ALLOCSEG 0,3

Sysinternals (now Microsoft) ProcessExplorer can show you where things have been loaded into memory that may be conflicting...

That's all I've got.

Regards,
Bryce Stenberg
IT Department
Harness Racing New Zealand Inc.

-----Original Message-----
From: BillHatVerizon
Sent: Monday, 29 February 2016, at 11:52 a.m.

I am on the server itself (development server) .
INFORMIXSERVER is set to the name of the instance.
The service is 9088.
IDS is running well and odbc connections run fine.
dbaccess even works.
It is just onstat, oncheck, etc.
I don't know how to do what you are telling me.

-----Original Message-----
From: Mike Walker
Sent: Monday, February 29, 2016 10:34 AM

I'm not sure that you need to change IFX_XFER_SHMBASE here.

Do you have your INFORMIXSERVER value set to a network connection? If so, do
you have a shared memory connection that you can use for INFORMIXSERVER
instead and see what happens?

-----Original Message-----
From: BillHatVerizon
Sent: Monday, February 29, 2016 9:04 AM

This is ids12.1.tc4 on windows server 2008 R2 sp1 .
This problem just started and I don√Ę‚¨‚Ęt know why.

When I run onstat I get this:
MapViewOfFileEx: w32ec=487 at nt_shm.c:754
09:51:19 shmat: [22]: operating system error
09:51:19 Client could not attach server shared memory segment, use
IFX_XFER_SHMBASE.
onstat: Cannot attach to shared memory. errno = 22

This article is on Linux ...
http://www-01.ibm.com/support/docview.wss?rs=630&uid=swg21238293

this is another
http://www-01.ibm.com/support/docview.wss?uid=swg21623474

In Windows, I presume they want me to √Ę‚¨Ňset
IFX_XFER_SHMBASE=someaddress√Ę‚¨¬Ě .
But the conundrum is that I cannot run onstat √Ę‚¨‚g seg to get an
address
to use.
Any ideas?

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