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<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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Slow download speed with JBoss 4.23 on Windows
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created by <a href="https://community.jboss.org/people/thwi">Thorsten W.</a> in <i>Performance Tuning</i> - <a href="https://community.jboss.org/message/719917#719917">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi all,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>my company is hosting JBoss on Windows Servers (2003 (R2), 2008 (R2)) as well as on SuSE SLES 11.</p><p>We're still using JBoss 4.2.3 but plan to switch to 7.1 this year.</p><p>We've detected a strange download issue with JBoss on (any of our) Windows servers. The download speed of static files (we've tested with a static 200 zip file) is much slower than with IIS or with Linux JBoss installations.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>While on localhost JBoss and IIS were both able to deliver the file with up to 160 MByte/s (as fast as the disk could), we've detected a bigger difference when we try that e.g. 10 network hops away: There we had the situation that IIS was able to transfer the file with 4 MByte/s while JBoss only could transfer with 1,6MByte/s.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>We tried the same thing with a server in the US, which is 14 hops away from us (Germany): IIS transferred with 400KByte/s while JBoss only transferred with 150KByte/s - with Apache in front connected via AJP the download speed increased up to 200KByte/s, but still half as fast as IIS.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've experimented with several JBoss Connector settings, e.g. maxKeepAliveRequests, keepAliveTimeout, connectionTimeout, acceptCount,</p><p>and context.xml settings, cacheMaxSize="204800" cacheTTL="60000"cachingAllowed="true", but it made no difference.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The question is, if this related to a suboptimal connection settings in JBoss or e.g. a bad MTU setting is slowing down the transfers?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks,</p><p>Thorsten</p></div>
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