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Upsun Continuous Profiler is powered by Blackfire. It is available directly the Console, under the Profiling tab of your environments. The PHP continuous profiling is currently made across 4 dimensions:
  • CPU Time: Time spent running on the CPU
  • Wall-time: Elapsed time per function call
  • Allocated Memory: Number of bytes allocated in memory
  • Allocations: Time spent running on the CPU
The default sampling frequency is 100 Hz. This means the PHP continuous profiler is collecting information 100 times per second.

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Prerequisites

Upsun Continuous Profiler requires PHP >=8.2.

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Installation

The Blackfire Continuous Profiler PHP library is included by default in all PHP images matching its requirements. There is no installation required.

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Configuration

The PHP continuous profiler is enabled by default without configuration. Optionally, you can override the following environment variables:
  • DD_PROFILING_ENABLED=true: forces the PHP continuous profiler activation/deactivation
  • DD_PROFILING_LOG_LEVEL=off: controls the PHP continuous profiler log level
Last modified on March 11, 2026