Zend Code Tracing

Zend Code Tracing enables real-time execution flow recording in Production Environments.

Code Tracing enables deep analysis of PHP execution and flow using drill-down requests related to an Event (Monitoring Rule), or triggered manually.

The component focuses on collecting key data points such as:

• Application functions and main PHP function calls including function arguments
• High-resolution timing and memory usage of execution elements.
• Key PHP engine services such as Web server interface calls

The information collection process focuses on keeping relevant information based on either user-defined parameters that trigger events Events are a result of the monitoring component checking your system and collecting information about a specific occurrence that indicates that your environment is displaying uncharacteristic behavior. or a specific URL that is manually entered to be traced. For monitor events, each time an event is triggered the information is kept for further use. Otherwise, the information will be discarded to preserve disk-space. Events can also be triggered to generate a trace file for a specific URL (see Triggering a URL Trace).

Trace information is a capture of the Function Tree and enables deep tracing of the functions of the server parameters, including:

• Returns
• Memory
• Time (ms)

Advantages

One of the most appealing characteristics of this application is that the performance and memory characteristics have been designed to be suitable for production environments and excellent in-depth trace of execution.

Other advantages:

• In-depth root-cause analysis when event happens. Trace of “exact” request which had the failure (a view back in time)
• No need for risky reproduction
• Insight into additional PHP subsystems beyond the script itself such as Web Server interface
• Technology suitable for development, testing, staging and production