Tomcat 7 Performance comparison before and after optimization

Tomcat 7 Performance comparison before and after optimization

Tomcat 7 is used in our daily development, testing, and production environments, but for most developers there is little understanding of their performance. In this paper, we do a performance test to compare the performance difference before and after optimization.

First, the operating environment

Cpu:intel (R) Pentium (r) [email protected]?;

Memory: 4G, installed is 32-bit Win7, only recognize 3G, did not take the time to ramdisk the whole thing;

Operating system: Win7 32-bit;

Jdk:1.7.0_55

tomcat:7.0.53

Everyone do not laugh, the company computer, to match such, Slow death, tragedy!

All of the tests below are based on 1000 requests and are all accessed by the Tomcat default root homepage

Second, not tuned before

The number of concurrent users is tested from 10-1000, and the test results are as follows:

From the test results above, the throughput and request processing times are stable except when the 200 users are in concurrency (which may be done at this time), but the request waiting time goes up in the back. After observation, the CPU load is below 80%.

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Third, after the optimization

Optimization is mainly done for Tomcat, there are two main aspects:

1, add the following parameters to the Bin/catalina.bat file, optimize the JVM, as for the role of the large camel parameters and instructions, we look online, there should be a lot of

Set? java_opts=

-server?

-xms1000m?

-xmx1000m??? The #-xms is set to the same value as the-XMX, preventing the JVM from causing performance fluctuations due to frequent GC

-xss512k?

-xx:+aggressiveopts?

-xx:+usebiasedlocking?

-xx:permsize=64m?

-xx:maxpermsize=300m?

-XX:+DISABLEEXPLICITGC?

-xx:maxtenuringthreshold=31?

-XX:+USECONCMARKSWEEPGC?

-XX:+USEPARNEWGC??

-xx:+cmsparallelremarkenabled?

-xx:+usecmscompactatfullcollection?

-xx:largepagesizeinbytes=128m??

-xx:+usefastaccessormethods?

-xx:+usecmsinitiatingoccupancyonly?

-djava.awt.headless=true

The above configuration, basically can achieve:

• ? Faster system response time
• JVM faster recovery rate without compromising system response
• JVM Maximum Memory Utilization
• Minimized thread blocking situation

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2, tomcat connection parameter optimization, mainly for the throughput optimization:

Modify the Conf/server.xml file to bring the original

<connector?port= "8080"? protocol= "http/1.1"?/>

Change to the following content

<connector?port= "8080"? protocol= "http/1.1"

??????????? Uriencoding= "UTF-8"??

??????????? Minsparethreads= "25"?

??????????? maxsparethreads= "75"

??????????? Enablelookups= "false"?

??????????? Disableuploadtimeout= "true"?

??????????? connectiontimeout= "20000"

??????????? Acceptcount= "???"

??????????? maxthreads= "300"?

??????????? maxprocessors= "1000"?

??????????? Minprocessors= "5"

??????????? Useurivalidationhack= "false"

??????????? Compression= "on"?

??????????? Compressionminsize= "2048"

??????????? Compressablemimetype= "Text/html,text/xml,text/javascript,text/css,text/plain"

??????????? redirectport= "8443"/>

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Then let's take a look at the performance of the 10-1000 concurrent users who initiated 1000 requests.

As you can see, after optimization, the throughput rate has reached an average of about 1800-1900, while the processing time is basically stable at 0.6ms, while the waiting time is up to 600ms.

Iv. Summary

Through the comparison of two results can be seen, throughput and server processing time has a great change, of course, in my broken machine also on such an effect, and then optimize the estimation will not "fly" up, interested friends can find the machine of the B point of the cow to try. Try to tell me the result, let me also happy.

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Tomcat 7 Performance comparison before and after optimization