T2000 network throughput is slow
I am building a three-tiered web application with apache servers front-ending Tomcat on a T2000 that connects to a datastore on another host.
Evaluating the throughput of the Tomcat layer on the T2000 compared to a 2-cpu Opteron and a 4-cpu v440 the T2000 is slow.
Average throughput is about:
5MB/sec on the t2000
8MB/sec on v440
25MB/sec on Opteron
The T2000 is not showing any bottlenecks on disk i/o, cpu, memory or network. I've tried tuning all manner of network parameters to no effect. Raw network throughput testing using netperf shows pretty much the same results. All the hosts that I'm testing are on the same network switch.
Network and JVM tuning has had no effect. I still suspect that a configuration somewhere is throttling thoughput. Anyone had experience like this with slow network performance?
[866 byte] By [
mhoutsa] at [2007-11-26 21:57:35]
# 1
What is the network driver that you are using? Sun updated recently to a new one with better performance, called e1000g, substituting the old ipge.Look at the sun site for T2000, there you`ll find links to e1000g`s driver.Thiago
# 2
Sorry for digging up such an old post but I'm having a very similar problem with all of my T2000s. They're all using the e1000g driver and showing 1000/full connection speeds at both ends. I'm only getting about 4.5 MB/sec throughput whereas I'm getting about 45 MB/sec throughput on some Dell systems on the same switch.
Did you ever get your problem resolved?
Chris
# 3
I am also having slowness problems on Solaris 10 T2000 machines. Our web tier is apache 1.3, application tier is tomcat 5.0.30. When I go directly to the application server, the throughput increases about 3-fold. I also get huge performance dips every 5 minutes where the throughput decreases by 95% for a period of about 40 seconds. During the dip the response times increase dramatically, and I also get connection errors.
