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Lessons from the field #8: Liberty in containers part 1: Java performance

As you begin to containerize Liberty applications, it's important to keep in mind how running in a container environment can affect performance. Performance tuning a Liberty container begins with tuning the JVM. The standard mechanisms that java uses to understand system resources such as memory...


Blog Entry
Lessons from the field #7: Logging WebSphere Application Server traditional performance statistics

If you experience production issues with WebSphere Application Server (WAS) traditional, it's often useful to log performance statistics to a file for later analysis. This includes things such as thread pool utilization, application response times, and so on. Running without such monitoring data...

Kevin Grigorenko's profile image

Blog Entry
Lessons from the field #6: IBM Java and OpenJ9 Just-In-Time Compiler Tuning

One of the key values of Java is the Just-In-Time (JIT) compiler . This converts the hottest Java methods from interpreted code into native code at runtime. The performance difference is massive: typically, 10-20 times faster (i.e. a magnitude). The JIT is enabled by default, and, in general,...

Kevin Grigorenko's profile image

Blog Entry
Lessons from the field #5: Monitor and keep your WebSphere environments running smoothly

For a video presentation of this topic, see the replay of the Customer Advisory Board session . Gauges: Small Airplanes, Large Airplanes and Space Shuttles Fifteen years ago, most administrators had very limited monitoring of their WebSphere Application Server (WAS) environments. Many only...

Kevin Grigorenko's profile image

Blog Entry
Lessons from the field #4: High Impact AIX Network Tuning

As the App Platform SWAT team, our focus is on WebSphere Application Server traditional and Liberty; however, even we've been surprised by how often we need to get into network tuning. General symptoms such as timeout errors and performance problems may be with the application, application...

Brent Daniel's profile image


Blog Entry
Lessons from the field #3: OpenShift Live Container Debugging

There are many ways to diagnose issues in containers running on the OpenShift Container Platform . Some of the main approaches are: Review application logs in the OpenShift web console under Pod Details ) Logs or gather logs from the command line with kubectl / oc logs Run...

Kevin Grigorenko's profile image

Blog Entry
Lessons from the field #2: Database timing on WAS traditional

WebSphere Application Server traditional periodically adds new diagnostic tools with new fixpacks. This posts covers the enableJDBCTiming tool added in WAS 9.0.0.4 and 8.5.5.12 to help administrators discover the cause of slow database transactions. In WAS traditional, there are many ways...

Kevin Grigorenko's profile image

Blog Entry
Lessons from the field #1: A free Troubleshooting and Performance Lab

This is the first post in a new blog series by the IBM App Platform SWAT team. Our team engages worldwide in critical situations for IBM WebSphere Application Server (WAS) (traditional and Liberty) with deep expertise in WAS, Java, operating systems, networking and other technologies to drive...

Kevin Grigorenko's profile image

Library Entry
IBM Cloud Now: Cryptographic Key Encryption, IBM and Confluent, and IBM Cloud App Configuration

Welcome back to IBM Cloud Now, a bi-weekly series bringing you the latest and greatest IBM Cloud news and announcements. Make sure to check out the IBM Cloud Blog for a full rundown of all announcements: http://ibm.biz/cloud-blog-announcemen... This week, we're covering the following: ...