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From Daniel Mikusa <dmik...@vmware.com>
Subject Re: Tomcat vs IIS download speed - configuration suggestions?
Date Thu, 10 Jan 2013 20:19:54 GMT
On Jan 10, 2013, at 3:10 PM, Linoma DevTeam wrote:

> Thank you everyone for the responses/suggestions.
> 
> I did ensure that those were the same during the tests, but had removed
> that from the server.xml before sending. Both servers had negotiated the
> equivalent of TLS_RSA_WITH_AES_128_CBC_SHA with the client during testing.
> 
> Also, i've verified the JVM is in server mode, and I'm currently using
> 1.6.0_14.

This is pretty old, you might also try the latest 1.6.0_x release and/or the latest 17.0_x
release.  Those could have some performance improvements which would narrow the gap.

Dan


> 
> At times i can hit increased speeds of 10.8MB/s for IIS (about as fast as
> this server's network card can handle), with tomcat running close to 7.8
> MB/s.  (I'm just thinking out loud here) Assuming this is a normal
> difference with tomcat running at 72% the speed of IIS, and if the system
> was congested to the point of slowing down the downloads from the servers,
> then I would expect tomcat to run at 2.5 MB/s if IIS was serving files at
> 3.5 MB/s.  It however looks like tomcat is serving data at a consistent 3.0
> MB/s slower than IIS (not percentage based), which is why i saw 350 KB/s
> against the 3.5 MB/s from IIS?
> 
> Anyway, I will try the APR connector and let you know.  Thanks again for
> your comments!
> 
> On Thu, Jan 10, 2013 at 8:31 AM, David kerber <dckerber@verizon.net> wrote:
> 
>> On 1/10/2013 8:56 AM, Linoma DevTeam wrote:
>> 
>>> Hi everyone,
>>> 
>>> I'm running some comparison tests with tomcat 6.0.35 and IIS running in
>>> parallel on Windows Server 2008 R2.  Now I would expect Tomcat to be
>>> somewhat slower, given the extra JVM layer, but in some situations, i'm
>>> seeing differences that are tough to swallow.
>>> 
>> 
>> What JVM are you running under?  Is it running the client or server
>> version?  I've found huge performance improvements in some kind of
>> operations under a server JVM compared to client ones.
>> 
>> 
>> D
>> 
>> 
>> 
>>> Downloads
>>> IIS         ~3.7 MB/s
>>> Tomcat  ~350 KB/s
>>> 
>>> Test Details:
>>> I placed a ~500MB file in the document root of the web app on tomcat and
>>> set up an HTTPS connector.  Then I set up IIS with the same file and an
>>> HTTPS listener.  I configured the cipher suite in tomcat to be the same
>>> one
>>> that was negotiated between IIS and my Chrome browser.  Finally, I set the
>>> JVM max memory to 1024MB with a min of 900MB to reduce the impact of the
>>> GC
>>> and the memory allocation.
>>> 
>>> I'm using HTTP/1.1 connectors with pretty standard configuration:
>>> 
>>> <Server port="9005" shutdown="SHUTDOWN">
>>> 
>>> <Service name="admin">
>>> <Connector port="9080" />
>>> 
>>> <Connector port="9443" protocol="HTTP/1.1"
>>> SSLEnabled="true" enableLookups="false" disableUploadTimeout="true"
>>> scheme="https" secure="true" clientAuth="false" sslProtocol="TLS"
>>> algorithm="SunX509" keystoreFile="C:\temp\sample_**keystore.jks"
>>> keystorePass="password" keyAlias="sample-key" keystoreType="JKS"
>>> truststoreFile="C:\temp\**sample_truststore.jks"
>>> truststorePass="password"
>>> truststoreType="JKS" />
>>> 
>>> <Engine name="admin" defaultHost="localhost">
>>> <Host name="localhost" appBase="webapps"
>>> errorReportValveClass="com.**company.**CustomErrorReportValve">
>>> <Context path="/sample" docBase="C:\temp\application\**WebRoot"
>>> reloadable="false">
>>> <Loader delegate="true" />
>>> </Context>
>>> </Host>
>>> </Engine>
>>> </Service>
>>> </Server>
>>> 
>>> So, I extend the question of, why would tomcat only be able to reach 10%
>>> of
>>> the speed IIS is able to server when running parallel tests?  Any
>>> suggestions on configurations that I could adjust on Tomcat, the JVM, or
>>> operating system that improve that download speed?
>>> 
>>> Thanks in advance!
>>> 
>>> 
>> 
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