Highlighted
Absent Member.
Absent Member.
2044 views

Memcal and >4gb memory

I have a Netware 6.5.4 server with 8gb of memory installed. I have been running into problems with low available Logical Address Space. I ran Hamish's Memcalc program (great tool btw) and it only shows "Physical memory (Bytes) : 4,155,969,536" I would assume that the system would acknowledge the full installed amount. NORM show "Total System Memory 8,589,342,720" My concern is that the programs output is taking into consideration the other 4gb of memory used for file cache.

Feed back appreciated.
Labels (1)
0 Likes
5 Replies
Highlighted
Absent Member.
Absent Member.

Re: Memcal and >4gb memory

NetWare, like most others NOSs, is a 32 bit OS. 2^32=4gb.

Memory above 4bg can be paged in and out and can be used for protected
memory spaces and Java only. So it's not completely useless but not
often very useful either.
--
Andrew C Taubman
Novell Support Forums Volunteer SysOp
http://support.novell.com/forums
(Sorry, support is not provided via e-mail)

Opinions expressed above are not
necessarily those of Novell Inc.
0 Likes
Highlighted
Absent Member.
Absent Member.

Re: Memcal and >4gb memory

Andrew,

> NetWare, like most others NOSs, is a 32 bit OS. 2^32=4gb.
>
> Memory above 4bg can be paged in and out and can be used for protected
> memory spaces and Java only. So it's not completely useless but not
> often very useful either.


On 6.5 it can also be used for NSS caching, but as its slower than
memory below 4GB, its limited to caching "larger" files, those above 128KB.


--
Hamish Speirs
Novell Support Forums Volunteer Sysop.

http://haitch.net

(Please, no email unless requested. Unsolicited support emails will
probably be ignored)
0 Likes
Highlighted
Absent Member.
Absent Member.

Re: Memcal and >4gb memory

Timothy,

> I have a Netware 6.5.4 server with 8gb of memory installed. I have been
> running into problems with low available Logical Address Space. I ran
> Hamish's Memcalc program (great tool btw) and it only shows "Physical
> memory (Bytes) : 4,155,969,536" I would assume that the system would
> acknowledge the full installed amount. NORM show "Total System Memory
> 8,589,342,720" My concern is that the programs output is taking into
> consideration the other 4gb of memory used for file cache.


The tuning only takes into conwsideration memory in the first 4GB - the
memory above that is only available for protected mode apps, java and
NSS caching. The tuning is designed to get an appropriate balance in the
first 4GB for NLM memory and NSSUse the recomendations it gives based on
the 4GB memory - the same settings apply wether you have 4,8 or 64GB.

--
Hamish Speirs
Novell Support Forums Volunteer Sysop.

http://haitch.net

(Please, no email unless requested. Unsolicited support emails will
probably be ignored)
0 Likes
Highlighted
Absent Member.
Absent Member.

Re: Memcal and >4gb memory

Thank you for clarifying this Hamish. This server is primarily file/print and stores many larger cadd and 3d modeling files. Well above the 128kb setting so it is my hopes that NSS will benefit from the other 4gb of memory.

>>> Hamish Speirs<hamish@haitch.net> 3/29/2006 7:23:32 PM >>>





From: Hamish Speirs [mailto:hamish@haitch.net]
Sent: Thursday, March 30, 2006 7:24:44 AM
To: novell.support.netware.6x.abends-hangs; novell.support.open-enterprise-server.netware.abends-hangs
Subject: Re: Memcal and >4gb memory

Timothy,

> I have a Netware 6.5.4 server with 8gb of memory installed. I have been
> running into problems with low available Logical Address Space. I ran
> Hamish's Memcalc program (great tool btw) and it only shows "Physical
> memory (Bytes) : 4,155,969,536" I would assume that the system would
> acknowledge the full installed amount. NORM show "Total System Memory
> 8,589,342,720" My concern is that the programs output is taking into
> consideration the other 4gb of memory used for file cache.


The tuning only takes into conwsideration memory in the first 4GB - the
memory above that is only available for protected mode apps, java and
NSS caching. The tuning is designed to get an appropriate balance in the
first 4GB for NLM memory and NSSUse the recomendations it gives based on
the 4GB memory - the same settings apply wether you have 4,8 or 64GB.

--
Hamish Speirs
Novell Support Forums Volunteer Sysop.

http://haitch.net

(Please, no email unless requested. Unsolicited support emails will
probably be ignored)
0 Likes
Highlighted
Absent Member.
Absent Member.

Re: Memcal and >4gb memory

Timothy,

> Thank you for clarifying this Hamish. This server is primarily
> file/print and stores many larger cadd and 3d modeling files. Well
> above the 128kb setting so it is my hopes that NSS will benefit from the
> other 4gb of memory.


No problem, and yes, the additional 4GB should help with the larger files.


--
Hamish Speirs
Novell Support Forums Volunteer Sysop.

http://haitch.net

(Please, no email unless requested. Unsolicited support emails will
probably be ignored)
0 Likes
The opinions expressed above are the personal opinions of the authors, not of Micro Focus. By using this site, you accept the Terms of Use and Rules of Participation. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. As of September 1, 2017, the Material is now offered by Micro Focus, a separately owned and operated company. Any reference to the HP and Hewlett Packard Enterprise/HPE marks is historical in nature, and the HP and Hewlett Packard Enterprise/HPE marks are the property of their respective owners.