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SPRING IOC CONTAINER – PERFORMANCE PROBLEM

Spring IOC Container wires the dependencies among the beans and returns the fully built bean tree to the caller. Every time, not fully built bean tree is used by the caller, only portion of it is used.  Thus a significant portion... Continue Reading →

GRACEFULLY AND QUICKLY EVICT HTTP PERSISTENT CONNECTIONS

Title of this article might sound like an oxymoron. How can persistent HTTP connections be gracefully and at the same time quickly evicted? By Gracefully I mean here the client applications to close the connections by themselves without jeopardizing the... Continue Reading →

MEMORY LEAK IN JAVA EXECUTOR!

I was surprised to witness the Java Executor behavior – which caused “java.lang.OutOfMemoryError: unable to create new native thread” in our application. I would like to share my surprise (i.e. problem) and resolution to it.

DATABASE CONNECTION POOL CONFIGURATION RECOMMENDATION

Configuring database connection pool is absolutely critical to the performance of the application. Configuring database connection pool is a double-edged sword; too strict configuration would degrade the application’s response time, whereas too lenient configuration would consume a lot of resources... Continue Reading →

DATASTAX CASSANDRA NETTY OUTOFMEMORYERROR

Recently I encountered this issue. One of the application connects with Apache Cassandra NoSQL Database. The application uses DataStax java driver to connect with Cassandra. DataStax has a dependency on the netty library. To be specific following are the Jars that application uses:... Continue Reading →

CPU MAXES OUT AND UTILIZATION NEVER GOES DOWN?

Have you ever encountered circumstance where your applications CPU maxes out and never goes down even if traffoc volume goes down? Did you had to recycle to JVM to remediate the problem? Even if you recycle the JVM, does your CPU start to... Continue Reading →

JVM PERFORMANCE ENGINEERING & TROUBLESHOOTING TRAINING

In this training program, engineers will be equipped with necessary knowledge to optimize CPU, memory and response time.

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