Cloud CM-IPMP Guía para resolver problemas descargar pdf (Pagina 103)

Chapter 16

Performance Tuning

16.1 Introduction

The Rhino SLEE will excel to production performance and stability requirements when it is conﬁgured, monitored and tuned

correctly. The following sections demonstrate administration strategies and conﬁgurations of Rhino SLEE which will provide

fault tolerance and high availability behaviour.

For documentation of the statistics features of Rhino SLEE please refer to Chapter 8.

16.2 Staging Conﬁguration

Staging refers to the micro management of work within the Rhino SLEE. The work is divided up into “Items” and executed by

"Workers".

Each worker is represented by a system level thread. The number of threads available to process the items on the stage can be

conﬁgured to minimise the latency, and henceforth increase the performance capacity of the Rhino SLEE.

Rhino performs event delivery on a pool of threads called “Staging Threads”. The staging thread system operates a queue for

units of work to be performed by Rhino, called "stage items". Typically, these units of work involve the delivery of SLEE events

to SBBs. When a “stage item” enters staging it is placed in a processing queue and removed by the ﬁrst available staging thread

which will then perform the work associated with that “stage item”.

The amount of time an event processing stage item spends in the staging queue before being processed by a stage worker

contributes to the overall latency in handling the event. Because of this, it is important to make sure that the staging threads

are being used optimally. There are a number of tunable parameters in the staging system that can be altered to improve

performance:

Parameter Description

maximum-size

The maximum size of the staging queue.

thread-count

The number of staging threads in the thread pool.

maximum-age

The maximum age of a staging item, in milliseconds.

Stage items that stay in the staging queue for longer than maximum-age are

automatically failed by the staging thread.

local-enabled

Enable thread local staging (see below).

local-maximum-size

Maximum size for staging threads local stage queues.

Table 16.1: Staging system tunable parameters

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 200 201

Sin comentarios

Cloud CM-IPMP Guía para resolver problemas Pagina 103