0001780: Performance slowdown with mod_caucho when 2nd backend is introduced

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Severity

Reproducibility

Date Submitted

Last Update

0001780

[Resin]

minor

always

06-06-07 10:36

10-05-07 19:22

Reporter

sam

View Status

public

Assigned To

ferg

Priority

normal

Resolution

unable to reproduce

Status

closed

Product Version

3.1.1

Summary

0001780: Performance slowdown with mod_caucho when 2nd backend is introduced

Description

(rep by M Morawetz)

I'm evaluating the resin-cluster capabilities. My problem is
that with the current setup using just one node performs
much better than having two nodes running.

The setup is:
Two apache server as frontend, I use the mod_caucho
module as load-balancer, two resin server. One Apache
and one resin instance is running on one physical server.

I tested the performance with Jmeter. Throughput with one
resin node running is about the double of the throughput
when I use both resin nodes (same load-Jmeter setup / 80 Users).
I was expecting an increased throughput having 2 nodes running.

Could that be a configuration issue? What are common
reasons for that behaviour? Any ideas?

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Notes
(0002324) ferg 10-05-07 19:22	Checked with multiple backends and Apache 2, with cases including both servers up and one backend down and both cases had the same performance.

Issue History
Date Modified	Username	Field	Change
06-06-07 10:36	sam	New Issue
10-05-07 19:22	ferg	Note Added: 0002324
10-05-07 19:22	ferg	Assigned To	=> ferg
10-05-07 19:22	ferg	Status	new => closed
10-05-07 19:22	ferg	Resolution	open => unable to reproduce
10-05-07 19:22	ferg	Fixed in Version	=> 3.1.3

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