Posted by Coder.
Results > Posts Filed Under > Profiling
Nov
2
Posted by Coder.
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 rather than diagnosing after-the-fact (application hangs, crashes, memory leaks, locks)
3. Tracing of transactions from Java to Database and vice-versa, enabling faster resolution of problems that …
Nov
28
Posted by Coder.
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 only need to know where to look for it…
Mar
20
Posted by Coder.
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 is the basis of the complaint (e.g. the report is running slowly, my screen is updating slowly, etc.).
Feb
21
Posted by coder.
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 code, you’re back to where you started, but I would be willing to bet if you’re having massive performance problems, it’s not directly in your …
Feb
10
Posted by coder.
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 application or kernel CPU utilization issue with mpstat: high percentages of users indicate it’s an application issue. High sys may point to high network load …