Weblogic 5.1 Performance Issue

Question

1. I am having a performence Issue with an application
on Weblogic App server.
2. The application is database intensive, with database operations
for some reports that take few minutes (2 to 5 mins).
The Weblogic thread count properties was set at 15 during this
test.
The JVM max heap size is set to 512 MB.
I am using Oracle thin Driver to connect from my jsp's/ EJB's(Stateless)
to the database.
3. When I simulated 30 users concurrent testing, the application
server is responding very slow. Even pages that do not
require any interaction with the database server (jsp's with
only html tags and no java) take time.
4. During the above test, CPU utilization was low (8%) and java
heap memory utilization was also low (10%).
The Execute Queue length was high (40 to 60) and Execute queue
throughput was low (1 to 5).
6. Subsequent to the above test, I increased the Weblogic thread
count properties to 30 and repeated the test.
The performance has improved little bit but heap memory became
close to 100%.
Can anyone tell what is going wrong?
Would using OCI driver instead of Oracle Thin Driver for this application
result in substantial benefit?

Answer 1

why dont you issue kill -3 on the process and determine what your threads
are doing. You bottleneck will become obvious.
BTW kill -3 gives you a thread dump
On 23 Mar 2001 14:35:48 -0800, Tiju John <[email protected]> wrote:
>
Hi
The application server having a cpu utilization of 20-25% on peak
load and Database server have cpu utilization of 10-12%
on peak load.
Tiju
Srikant Subramaniam <[email protected]> wrote:
looks like you are db-bound ... what is the cpu utilization
on the db server?
Srikant.
Tju John wrote:
1. I am having a performence Issue with an application
on Weblogic App server.
2. The application is database intensive, with databaseoperations
for some reports that take few minutes (2 to 5 mins).
The Weblogic thread count properties was set at 15during this
test.
The JVM max heap size is set to 512 MB.
I am using Oracle thin Driver to connect from myjsp's/ EJB's(Stateless)
to the database.
3. When I simulated 30 users concurrent testing, theapplication
server is responding very slow. Even pages that do not
require any interaction with the database server(jsp's with
only html tags and no java) take time.
4. During the above test, CPU utilization was low (8%)and java
heap memory utilization was also low (10%).
The Execute Queue length was high (40 to 60) andExecute queue
throughput was low (1 to 5).
6. Subsequent to the above test, I increased the Weblogicthread
count properties to 30 and repeated the test.
The performance has improved little bit but heapmemory became
close to 100%.
Can anyone tell what is going wrong?
Would using OCI driver instead of Oracle Thin Driverfor this application
result in substantial benefit?--
Srikant, [email protected], http://weblogic.bea.com/,
etc.