-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Aadit,
On 4/9/19 15:19, Aadit Shah wrote: > We have recently upgraded our software to utilize Tomcat 8.5.32 > from Tomcat 7.0.81. With the upgrade, we are seeing an increased > amount of I/Os happening between the Tomcat Server and the DB. Do you have Tomcat configured to handle user-authentication? Id not, then Tomcat is not contacting your database at all. > We are looking for help to understand the cause of the increased > amount of I/Os and possible solutions to improve our software to > get a workaround. > > Issue: Tomcat is one of the core components of our software. With > 8.5.32 upgrade, due to the increased amount of I/Os, we are seeing > a latency in our software. Due to the latency, the overall > performance of the software has been degraded and the end users are > seeing issues like > > - longer login times - longer wait time to load/reload the data. > > Troubleshooting: We ran a bunch of tests and confirmed that our > packet captures show that 20x increase in the I/O operations > between Tomcat 7.0.81 and 8.5.32. Did you change your database driver version at the same time? What about the application? Did the application change at all? > Here’s the matrix which shows number of I/O we captured between > different versions of Our Software version and Tomcat versions. Your attachment and/or screenshot has been removed from the mailing list. Please provide a text-only rendering in your follow-up post. > Our Software Version > > Tomcat 7.0.81 > > 8.5.32 > > 18 > > 200 > > 23,000 > > 19 > > 1200 > > 240,000 The above table didn't translate well. What is it supposed to be? > Server Information: OS: Windows Server 2012 R2 Ouch. A 5-year-old abandoned Microsoft operating system? I hope you pay a lot to your security provider for all the CYA you need. > Java : JRE1.8.0.111 Initial Memory Pool: 512 MB Maximum Memory Pool > : 1024 MB Recommendation: set min and max to the same value. There is no advantage to setting them to different values and some performance advantages to setting them to the same value. > Note: There are other software running on the server. > > DB Connection Configuration: Here’s how the connection from the > Tomcat Server to DB Server look like: > > Tomcat 7.0.81: > > <Resource name="jdbc/heartbeatdb" auth="Container" > type="javax.sql.DataSource" maxActive="200" maxIdle="30" > maxWait="10000" > driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver" > url="jdbc:sqlserver://<Server>\<instance>;database=heartbeat;integrate dSecurity=true" > > validationQuery="SELECT 1" > testWhileIdle="true" timeBetweenEvictionRunsMillis="3600000" > numTestsPerEvictionRun="30" minEvictableIdleTimeMillis="14400000" > removeAbandoned="true" removeAbandonedTimeout="300" > logAbandoned="true"/> 200 connections is a lot of connections. How many concurrent requests would you estimate that you actually handle at peak? > Tomcat 8.5.32: > > <Resource name="jdbc/heartbeatdb" auth="Container" > type="javax.sql.DataSource" maxTotal="200" maxIdle="30" > maxWaitMillis="10000" > driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver" > url="jdbc:sqlserver://<Server>\<instance>;database=heartbeat;integrate dSecurity=true" > > testWhileIdle="true" > validationQuery="SELECT 1" timeBetweenEvictionRunsMillis="3600000" > numTestsPerEvictionRun="30" minEvictableIdleTimeMillis="14400000" > removeAbandonedOnBorrow="true" removeAbandonedOnMaintenance="true" > removeAbandonedTimeout="300" logAbandoned="true" /> > > Let me know if you need more information from our side. We can > also provide full server.xml configuration from both the versions > of the software. > > We are new to Tomcat Support group, so let us know if this is the > right way to request for help. > > If you want to learn more about our company, you can click the > links in the signature. Are you using Tomcat for container-managed authentication? That's not clear from your configuration. - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAlytJ80ACgkQHPApP6U8 pFhFkQ//fvNVhgRno2H7IOdULXN0BlAAE6kW6/wuClAYNB++t9Y+96lnEIoMgQx3 +W7Ind4g1TepwXBK9mVPuuS30i4O8/uCtBL9rCf6z5xJZGV113Gova/U04TIt2iO jQ2neeBdsUg5abcCQH959qGGp0he4hibH7xeWXabp42a5WaFLNQFu4YtUj9wFWlw A9/8EhWVOqRmkX/0vcSkj/MgE/kAR+C4dkQBHjZpQzKWRjGiWrJVXJ/Ujpp+AL3f JY2S76d7IG+XQ1BngZcbX9k83IM7crfCcPWeNsQM4C/LgfJWHu0Jt7dVyDBbHU4Y Jkyd1OWoAnNQCfvXbkb8C6mdCtjVjCrlziBd6JJ8QJTBkhMW2L9v0clMJvL4U9yY aEDKCEhAOLlsYtcWIyv2hLvUFmjKmjbRm7pv1N1+TQXSw+1qDsCHNQC+KLyN5kI/ ac/fxxArQ0fxsanTSh3jI8qCcsLKx5kwDxjtB2u1IiPlYaxi9zCG11lIEsCn9BQz ALnnFKDODEiyAYkzjau82rrToWgootsUmgLUMpN3prOuyXwawfq9GMyMcEA6zzGT P51LU4dvIWjeBtI+W8mTZ/yxV882prJZtBCeBk/WOeTeKNN/Jrd2VeUE7ROvM9Lh firIRCsm5oVcu5miRBw2kU49NTmEE/pqHWhMjduOLW2+lXDBxKw= =95f+ -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
