Enterprise Library Test Guide - Willy .Net

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Enterprise Library Test Guide
Area Performance counter name Threshold
.NET CLR Memory (w3wp) % Time in GC This is the percentage of time
spent performing the last
garbage collection. An average
value of 5 percent or less is
ideal because all threads are
suspended during a garbage
collection. For Enterprise
Library, this number should be
from 5 percent to 9 percent.
The most common cause of
a high value is that the application
block is allocating
memory for too many objects
for each request.
.NET CLR Memory (w3wp)
# Gen 0 Collections
# Gen 1 Collections
# Gen 2 Collections
These counters indicate the
number of times the generation
(Gen) n objects are
garbage-collected from the
start of the application. The
number of Gen 0 collections
should be 10 times higher
than Gen 1 collections, which
should be 10 times higher
than Generation 2 collections.
In other words, a Gen 1 collection
should be one-tenth the
value of the number of Gen 0
collections, and so on.
.NET CLR Memory (w3wp) # GC Handles This value should be stable
during stress tests. It is the
current number of garbage collection
handles in use.