Differential D13956 Diff 33689 src/docs/user/field/darkconsole.diviner

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src/docs/user/field/darkconsole.diviner

Show First 20 Lines • Show All 132 Lines • ▼ Show 20 Lines	Generally, this column can help pinpoint these kinds of problems:
- Opportunities to improve performance with caching.		- Opportunities to improve performance with caching.
- General goofiness in how service calls are woking.		- General goofiness in how service calls are woking.

If the services tab looks fine, and particularly if a page is slow but the		If the services tab looks fine, and particularly if a page is slow but the
"All Services" cost is small, that may indicate a problem in PHP. The best		"All Services" cost is small, that may indicate a problem in PHP. The best
tool to understand problems in PHP is XHProf.		tool to understand problems in PHP is XHProf.


		Plugin: Startup
		===============

		The "Startup" plugin shows information about startup phases. This information
		can provide insight about performance problems which occur before the profiler
		can start.

		Normally, the profiler is the best tool for understanding runtime performance,
		but some work is performed before the profiler starts (for example, loading
		libraries and configuration). If there is a substantial difference between the
		wall time reported by the profiler and the "Entire Page" cost reported by the
		Services tab, the Startup tab can help account for that time.

		It is normal for starting the profiler to increase the cost of the page
		somewhat: the profiler itself adds overhead while it is running, and the page
		must do some work after the profiler is stopped to save the profile and
		complete other shutdown operations.


Plugin: XHProf		Plugin: XHProf
==============		==============

The "XHProf" plugin gives you access to the XHProf profiler. To use it, you need		The "XHProf" plugin gives you access to the XHProf profiler. To use it, you need
to install the corresponding PHP plugin.		to install the corresponding PHP plugin.

Once it is installed, you can use XHProf to profile the runtime performance of		Once it is installed, you can use XHProf to profile the runtime performance of
a page. This will show you a detailed breakdown of where PHP spent time. This		a page. This will show you a detailed breakdown of where PHP spent time. This
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