Archives for Performance Tuning and Production Troubleshooting
Try the ?nocache=1 option
TO test correct behavior in a browser ( http not redirecting to ) try adding a ?nocache=1 to your url
APM questions to ask
-- What is the technology stack of the apps being monitored (J2EE, .NET, )? -- Do we need to look at specific Application metrics - such as Transactions per second,…
Performance Monitoring Tools
A list of performance monitoring tools. Website Monitoring Tools Insping Updown Pingometer Uptime Robot Pingdom Server Monitoring Tools Insping Nagios Core Ganglia Collectd Network Monitoring Tools Nagios Capsa Free Fiddler…
Static code analysis
Static code analysis helps identify code vulnerabilities (and performance issues) before code makes it to production. Most 'code coverage' tools require the full source code (compilable source code) to run…
Quick troubleshooting of slow responsiveness on an IIS–SQL Server app
On the very first set of requests – monitor the incoming requests (by running a SQL profiler trace). In conjunction, on the IIS server, you may need to run a…
Some options for load testing web applications
These two tools are commonly used for load testing web Fiddler (free)2. Visual Studio Ultimate – Web Performance Test Editor (comes with VS Ultimate)Fiddler is really easy to get started…
How to handle an unresponsive IIS web application
SYMPTOMS – IIS is using up a lot of memory – resulting in a slowing down of request processing. Both – single request processing - as well as throughput (number…
Some important server perfmon counters to monitor
Some of the more important ones include: Processor: Processor\% Processor Time (This counter is the primary indicator of processor activity. High values many not necessarily be bad. However, if the…
Configuring an authentication header in fiddler
Fiddler - Authentication header Click Rules > Customize Inside the OnBeforeRequest handler, = "domain\\user:password";
Using TTFB to distinguish between server side and client side page load issues
Introduction This is just a quick note to highlight a commonly used web testing metric for making an initial determination of where the source of bottleneck(s ) might be. TTFB…