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Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

APD Configuration Options
Name Default Changeable Changelog
apd.dumpdir NULL PHP_INI_ALL  
apd.statement_tracing "0" PHP_INI_ALL Available since apd 0.9.
For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

apd.dumpdir string

Sets the directory in which APD writes profile dump files. You can specify an absolute path or a relative path.

You can specify a different directory as an argument to apd_set_pprof_trace().

apd.statement_tracing boolean

Specfies whether or not to do per-line tracings. Turning this on (1) will impact the performance of your application.

PHP Manual