RE: Scaleability and transaction support

14 May 2003 16:14:50 -0000

HPUX, Tomcat 4.0.3, 1Gb of memory, JDK1.3, indexing all the fields I'm querying against
 
I actually run some performance testing on 1.0 and, surprise, a single query was faster on 1.0 comparing to 1.1b. Search the archives for 'xindice1.1b performance' you'll find the short discussion around the degraded 1.1 performance.
 
Cheers,
 
Bob S.
 
-----Original Message-----
From: Devrim Ergel [mailto:[EMAIL PROTECTED]
Sent: Wednesday, May 14, 2003 9:13 AM
To: xindice-users@xml.apache.org
Subject: Re: Scaleability and transaction support

These results are very good.
We also applied similar tests on 1.0. The result was disappointing. We made two concurrent Xpath queries,  in 3000 documents(20-30 kb size), which returns 400 of them. As a result we had "out of memory" exception. Single result query time was good; 20-30 ms.
 
Our configuration:
Xindice 1.0 (we implemented collection pooling)
Tomcat 4.0.3
Windows 2000
Pentium 4 1.6
256 Mb JVM
 
What is your hardware and JVM memory settings? Do you use Tomcat as application server? Did you ever used Xindice 1.0, is there some timing improvement on 1.1b?
 
Thank you.
 
Devrim Ergel
 
 
----- Original Message
-----
Sent: Wednesday, May 14, 2003 6:34 PM
Subject: RE: Scaleability and transaction support

We did some load tests with 75 concurrent users accessing collection of approximately 2500 docs, 3 - 5Mb in size. 1.1b was behaving fine.
 
The setup:
1. client access through the browser
2. XPath query (retrieves about 20 docs)
3. XSL stylesheet is applied to each to render the resulting HTML
 
Here are some numbers:
 

Average Page Load: 0.74 Seconds

Minimum Page Load: 0.30 Seconds

Maximum Page Load: 23.39 Seconds

Total HTTP Requests: 90,376

Requests/Sec: 100.41

Pages/Sec: 100.41

CPU Utilization of hpma523: 23%

Load Time Standard Deviation: 1.20

# of objects in page: 1

What was puzzling - on approximately every 30th request, response will choke up to 25 sec, bringing the overall response time to .74 sec

And don't forget to implement some sort of object pooling for the collections. I was using jakarta.commons.pool

good luck

Bob Stone

-----Original Message-----
From: jcplerm [mailto:]
Sent: Tuesday, May 13, 2003 8:21 PM
To: xindice-users@xml.apache.org
Subject: Scaleability and transaction support

What is the status of Xindice with regards to scaleability and concurrency and transaction support?
How does Xindice behave under heavy loads, with lots of users querying and updating XML docs?
Let's assume the documents are of reasonable size, let's say 400KB the largest and 3KB in average.
 
Is Xindice multithreaded, or there is a separate process per client?
 
I am seriously considering Xindice for a project and I would appreciate any feedback.
 
Thanks a lot,
 
Julio Lerm
Chicago, IL

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