02 Nov
Posted by Coder as Best practices, Databases, Monitoring, Oracle, Performance, Profiling, Reliability
Oracle Enterprise Manager Java Application Diagnostic Expert (JADE)
Oracle Enterprise Manager Java Application Diagnostic Expert (JADE) improves the availability, performance and provides in-depth diagnostics for Java applications with low overhead. It enables:
1. Production diagnostics with no application instrumentation, saving time in reproducing problems
2. Visibility into Java activity including in-flight transactions, allowing administrators to proactively identify issues [...]
28 Nov
Posted by Coder as Best practices, MySQL, Performance, Profiling, SQL, Scalability
Identifying MySQL slow queries | MDLog:/sysadmin
… steps in optimizing and tuning mysql is to identify the queries that are causing problems. How can we find out what queries are taking a long time tocomplete? How can we see what queries are slowing down the mysql server? Mysql has the answer for us and we [...]
WHITEPAPERS
When a production system performance issue is reported resist the temptation to study system wide statistics and extrapolate, particularly if they are historic smoothed averages with no indication of standard deviation (e.g. historic sar data taken by five minute samples in cron). It is usually far more fruitful to identify the thread of execution which [...]
21 Feb
Posted by coder as DTrace, JVM Runtime, Java, Performance, Profiling
ACM Queue - A Conversation with Jarod Jenson - Tales from the trenches with a former Enron performance guru
Chances are your algorithm is good, so you should do some hunting elsewhere. Use the tools you have today, such as DTrace or VTune. Ask where the application is spending its time. If it is in the [...]
10 Feb
Posted by coder as Architecture, Best practices, Java, Monitoring, Patterns, Performance, Processor, Profiling, Reliability, Scalability
Sun Dialogue Programs
(Q): If you have to pick top 10 things that you must monitor on any server to look for performance and/or scalability issues…what would they be?
Richard McDougall (A): Off the top of my head, in no particular order:
CPU: Check idle time and run queue length.
If there’s a CPU bottleneck, check if it’s an [...]
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