php man page for event_buffer_watermark_set

EVENT_BUFFER_WATERMARK_SET(3)						 1					     EVENT_BUFFER_WATERMARK_SET(3)

event_buffer_watermark_set - Set the watermarks for read and write events

SYNOPSIS
       void event_buffer_watermark_set (resource  $bevent, int	$events, int  $lowmark, int  $highmark)

DESCRIPTION
	Sets the watermarks for read and write events. Libevent does not invoke read callback unless there is at least $lowmark bytes in the input
       buffer; if the read buffer is beyond the $highmark, reading is stopped. On output, the write callback is invoked whenever the buffered data
       falls below the $lowmark.

PARAMETERS
	      o $bevent
		- Valid buffered event resource.

	      o $events
		- Any combination of EV_READ and EV_WRITE.

	      o $lowmark
		- Low watermark.

	      o $highmark
		- High watermark.

PHP Documentation Group 											     EVENT_BUFFER_WATERMARK_SET(3)