RE: Can't use SapDB stably - stalls without recovery when overloa ded

Hi Tryer,

We are a long time SAPDB user (over 2 years) and also have seen similar
problems under high concurrency.  SAPDB will just stall and stick.  I
suspect it is more with the communications protocol than the kernel, as
often firing up another form of client (DBMCLI) will work while other
transactions are failing.

Did you get any other replies to your problem?

  Stephen Gutknecht
  currently in Victorville, California


-----Original Message-----
From: Tryer Try [mailto:[email protected]] 
Sent: Wednesday, July 16, 2003 7:16 PM
To: [email protected]
Subject: Can't use SapDB stably


Hi, 

I have downloaded SAP DB from www.sapdb.org. 
However, I have encountered following technical 
problems:

I attempted to run standard TPC-C tests on SAP DB 
to evaluate its performance. However, it always 
failed when the number of transaction 
thread number is over 200(approximated).

Under Linux (Red Hat 8), the number of thread 
"kernel" of SAP reduces to three and then it is 
NOT responsive any more to TPC-C tests. However, I 
can still connect to SAP using the client management
tool.

Under MS Windows 2000 Server, it stops responding
immediately when the thread number exceeds a certain
threshold without any change about the thread 
"kernel".

My SAP DB version is 7.4. I am looking forward to 
your answer.

Thank you in advance.

Best Regards, 

Tryer