SQL Server 2000 2GB Memory Limit?

Jul 23, 2005

SQL Server 2000 SP3 on a Dell dual 2.4GHz Xeon box 3GB RAM Windows 2K
SP4. Two aplication dbs, each less than 2GB in size.

Had a problem where we would run Solomon queries and what not against
the box. It had 2GB RAM, and sqlserv.exe would take up to 1.85GB of
RAM, exhausting the physical RAM on the box. SQL would choke and the
Solomon users would have problems, and I would have to restart the SQL
service.

I added another GB of RAM, bringing the box to 3GB, and increased the
paging file. The OS sees it, and SQL sees it. I check Enterprise
Manager, and tell SQL to dynamically configure memory, and it offers an
upper limit of 3071MB, so it "sees" the 3GB.

I can stress the box with queries to the point that sqlserv.exe takes
1.99GB of memory (as viewed through Task Manager) and then SQL server
chokes. It never goes past 2GB, and the OS and box continue running
fine.

Does SQL server 2000 have some upper limit, or do I just need to change
some setting through EM?

Thanks.

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Hello!


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Hi to alll,


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Apr 4, 2007

Good day everyone!

The issue I'm going to pose here has to do with SQL Server allocated memory BEING EXHAUSTED by an application (a simple data receiver from GPS units) when the number of units connecting to it is considerably increasing.
This happens to an extent that no more connections from the units are valid and therefore lots of data (Afterwards) is being lost.
This causes a real problem with the installations and the projects which are running the system.

I will hereby post all of the info which might be useful for any Database Experts among you, so you can perhaps help me figure out the source(s) of the mentioned problem, and possible solution(s) of the issue.

1- The Operating System used:
Windows 2003 Server (Ent. Edition)

2- The Database Server used:
Microsoft SQL 2000 Server

3- The amount of memory:
1 GB (but on some sites there are 4 GB and the same problem
is faced)

4- The conditions where the issue happens
When the amount of the received data - which gets written to
the SQL Server tables - exceeds a certain limit.

5- Number of applications used:
We are using two applications:
a- The receiver, which is a simple application that only
receives the data from the GPS units installed at the cars
of the clients' fleet(s), and writes them to the database
(Day and Night - running all the time), so the memory used
gets bigger and bigger till it floats the memory used by
MS SQL Server 2000. As a result of this the connections
made from the units furtherly to this point (to the receiver)
are not being received and written to the database.

b- the other application is quite heavy.. it does data
management on SQL Server 2000 and exhausts the CPU.
It reads from tables and makes analysis for GPS data...
This is done while "vehicle tracking".. so it makes
calculations on the received data and stores them into
output tables.

6- The programming language used in writing these 2 applications:
Delphi 7

7- What are we doing right now to handle this problem?
We need to flush the memory on periodical basis.
This is being done by stopping the SQL Server, or by
restarting the PC.
And it is not solving the problem entirely, especially that
there must be a way to handle this.
BTW, the memory is not being flushed when we turn the
application off.

8- What do we need to know?

a- We've found, after research, that there are "Temporary tables" or
objects in SQL Server 2000, that the DB system creates.. also page
files, and temp tables.
What are these for? And does handling them in a certain manner help
solve the problem?
b- Is there a way to monitor our applications to see where they are
increasing the usage of memory and how this is happening?
c- Is there a script that writes to the database that we can use to see if
the problem is from our applications? And in case it is, then is there a
command we should write or a function or script we should run in order
to flush the MS SQL 2000 Server periodically, so that it doesn't flood?


What comments can you have on this issue?
Are there solutions at hand?


I thank everyone for trying to help!

All the best :beer: :beer:
TD.


P.S. you can write to me at: database1980 (AT) hotmail (DOT) com

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I understand SQL 2000 Standard on Windows 2003 Server Standard has a 2gb memory limit, however why wont the memory push up to this limit? The OS shows there is around 700mb of the 3076 unused (SQL uses 1660, windows uses around 700 making the maximum used around 2300 of the 3076)



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Thanks for your help

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