Option Name:netdb_high
Default Value:netdb_high 1000
Suggested Config:

	The high water mark for the ICMP measurement database.

	Note: low watermark controlled by netdb_low directive.

	These watermarks are counts, not percents.  The defaults are
	(low) 900 and (high) 1000.  When the high water mark is
	reached, database entries will be deleted until the low
	mark is reached.