Sun Microsystems Netscape Enterprise Server, Руководство администратора

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Chapter 10, Configuring the Server for Performance 243
Using perfdump Statistics to Tune Your Server
Work queue length/Limit
These numbers refer to a queue of server requests that are waiting for the use
of a native thread from the pool. The Work Queue Length is the current
number of requests waiting for a native thread. Limit is the maximum number
of requests that can be queued at one time to wait for a native thread., and is
determined by the setting of the
NSCP_POOL_WORKQUEUEMAX
environment
variable.
Tuning
Modify the
NSCP_POOL_WORKQUEUEMAX
environment variable.
Peak work queue length
This is the highest number of requests that were ever queued up
simultaneously for the use of a native thread since the server was started. This
value can be viewed as the maximum concurrency for requests requiring a
native thread.
This setting is not tunable.
Work queue rejections
This is the cumulative number of requests that have needed the use of a native
thread, but that have been rejected due to the work queue being full. By
default, these requests are rejected with a “503 - Service Unavailable” response.
This setting is not tunable.
PostThreadsEarly
This advanced tuning parameter changes the thread allocation algorithm by
causing the server to check for threads available for accept before executing a
request. The default is set to Off. Recommended only in those situations when
the load on the server is primarily comprised of lengthy transactions such as
LiveWire and the Netscape Application Server or custom applications that
access databases and other complex back-end systems. Turning this on allows
the server to grow its thread pool more rapidly.