Hi,
We have a serious problem on our production cluster.
It's a MSCS cluster with 16GB RAM for each node and Windows 2003 EE
Server R2 sp2 32 bit installed on 64bit processors.
In the file boot.ini the parameter /PAE is set.
We're trying to set the /3GB flag as well but after rebooting a node ,
but we have experienced serious instability at the OS level. Windows
is not responding anymore relating
to OS basic processes that fail to start, network interfaces not
recognized anymore and other weird stuff concerning domain policies
and user environment. So we took the /3GB off the boot.ini.
Is the /3GB usable together with the /PAE parameter in such an
architecture? We thought it were, as we can see from some SAP notes
and Microsoft documents.
We also have opened a message at SAP and they confirmed this
possibility.
Moreover, starting an SAP application server and a MSSQL 2005 sp1
server on a node, we notice that from the Windows Task Manager the RAM
consumption reaches around 3
GB and afterward all the memory request goes largely into using the
paging file.
We also tried to set the windows page file to 0 (zero) (NO PAGE FILE)
but starting the database and/or the SAP application what we could see
was that in the task manager the physical memory consumption was very
low and the page file usage very high.
It seems the servers cannot address all the 16GB recognized at OS
level.
Is it possible to use all the RAM available without exploiting the OS
page file?
We are going live within few days.
Could you please tell us how to solve the problem asap?
Hardware vendor and model:
- HP DL 380 G5 with 16GB ram , HBA card for a fibre channel connection
to the storage HP EVA 4000 (HSV200-B), N° 2 local hard disk for the
local boot ( 2 x 72GB), N° 2 lan card 1000tx.
Operating system: Windows 2003 Enterprise ed. English version R2 with
SP2
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