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  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2011-05-11 10:41:53 UTC
  • Revision ID: james.westby@ubuntu.com-20110511104153-psbh2o58553fv1m0
Tags: upstream-9.1~beta1
Import upstream version 9.1~beta1

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doc/src/sgml/html/monitoring.html
 
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 
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<HTML
 
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><HEAD
 
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><TITLE
 
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>Monitoring Database Activity</TITLE
 
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><META
 
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NAME="GENERATOR"
 
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CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
 
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REV="MADE"
 
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HREF="mailto:pgsql-docs@postgresql.org"><LINK
 
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REL="HOME"
 
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TITLE="PostgreSQL 9.1beta1 Documentation"
 
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HREF="index.html"><LINK
 
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REL="UP"
 
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TITLE="Server Administration"
 
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HREF="admin.html"><LINK
 
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REL="PREVIOUS"
 
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TITLE="Standby Server Settings"
 
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HREF="standby-settings.html"><LINK
 
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REL="NEXT"
 
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TITLE="Standard Unix Tools"
 
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HREF="monitoring-ps.html"><LINK
 
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REL="STYLESHEET"
 
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TYPE="text/css"
 
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HREF="stylesheet.css"><META
 
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HTTP-EQUIV="Content-Type"
 
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CONTENT="text/html; charset=ISO-8859-1"><META
 
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NAME="creation"
 
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CONTENT="2011-04-27T21:20:33"></HEAD
 
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><BODY
 
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CLASS="CHAPTER"
 
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><DIV
 
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CLASS="NAVHEADER"
 
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><TABLE
 
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SUMMARY="Header navigation table"
 
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WIDTH="100%"
 
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BORDER="0"
 
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CELLPADDING="0"
 
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CELLSPACING="0"
 
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><TR
 
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><TH
 
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COLSPAN="5"
 
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ALIGN="center"
 
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VALIGN="bottom"
 
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><A
 
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HREF="index.html"
 
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>PostgreSQL 9.1beta1 Documentation</A
 
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></TH
 
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></TR
 
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><TR
 
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><TD
 
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WIDTH="10%"
 
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ALIGN="left"
 
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VALIGN="top"
 
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><A
 
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TITLE="Standby Server Settings"
 
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HREF="standby-settings.html"
 
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ACCESSKEY="P"
 
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>Prev</A
 
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></TD
 
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><TD
 
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WIDTH="10%"
 
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ALIGN="left"
 
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VALIGN="top"
 
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><A
 
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TITLE="Recovery Configuration"
 
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HREF="recovery-config.html"
 
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>Fast Backward</A
 
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></TD
 
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><TD
 
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WIDTH="60%"
 
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ALIGN="center"
 
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VALIGN="bottom"
 
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></TD
 
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><TD
 
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WIDTH="10%"
 
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ALIGN="right"
 
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VALIGN="top"
 
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><A
 
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TITLE="Monitoring Disk Usage"
 
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HREF="diskusage.html"
 
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>Fast Forward</A
 
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></TD
 
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><TD
 
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WIDTH="10%"
 
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ALIGN="right"
 
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VALIGN="top"
 
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><A
 
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TITLE="Standard Unix Tools"
 
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HREF="monitoring-ps.html"
 
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ACCESSKEY="N"
 
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>Next</A
 
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></TD
 
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></TR
 
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></TABLE
 
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><HR
 
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ALIGN="LEFT"
 
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WIDTH="100%"></DIV
 
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><DIV
 
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CLASS="CHAPTER"
 
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><H1
 
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><A
 
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NAME="MONITORING"
 
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></A
 
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>Chapter 27. Monitoring Database Activity</H1
 
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><DIV
 
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CLASS="TOC"
 
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><DL
 
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><DT
 
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><B
 
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>Table of Contents</B
 
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></DT
 
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><DT
 
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>27.1. <A
 
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HREF="monitoring-ps.html"
 
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>Standard Unix Tools</A
 
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></DT
 
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><DT
 
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>27.2. <A
 
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HREF="monitoring-stats.html"
 
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>The Statistics Collector</A
 
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></DT
 
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><DD
 
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><DL
 
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><DT
 
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>27.2.1. <A
 
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HREF="monitoring-stats.html#MONITORING-STATS-SETUP"
 
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>Statistics Collection Configuration</A
 
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></DT
 
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><DT
 
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>27.2.2. <A
 
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HREF="monitoring-stats.html#MONITORING-STATS-VIEWS"
 
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>Viewing Collected Statistics</A
 
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></DT
 
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></DL
 
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></DD
 
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><DT
 
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>27.3. <A
 
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HREF="monitoring-locks.html"
 
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>Viewing Locks</A
 
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></DT
 
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><DT
 
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>27.4. <A
 
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HREF="dynamic-trace.html"
 
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>Dynamic Tracing</A
 
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></DT
 
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><DD
 
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><DL
 
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><DT
 
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>27.4.1. <A
 
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HREF="dynamic-trace.html#COMPILING-FOR-TRACE"
 
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>Compiling for Dynamic Tracing</A
 
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></DT
 
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><DT
 
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>27.4.2. <A
 
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HREF="dynamic-trace.html#TRACE-POINTS"
 
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>Built-in Probes</A
 
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></DT
 
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><DT
 
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>27.4.3. <A
 
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HREF="dynamic-trace.html#USING-TRACE-POINTS"
 
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>Using Probes</A
 
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></DT
 
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><DT
 
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>27.4.4. <A
 
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HREF="dynamic-trace.html#DEFINING-TRACE-POINTS"
 
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>Defining New Probes</A
 
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></DT
 
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></DL
 
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></DD
 
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></DL
 
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></DIV
 
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><P
 
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>  A database administrator frequently wonders, <SPAN
 
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CLASS="QUOTE"
 
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>"What is the system
 
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  doing right now?"</SPAN
 
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>
 
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  This chapter discusses how to find that out.
 
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 </P
 
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><P
 
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>   Several tools are available for monitoring database activity and
 
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   analyzing performance.  Most of this chapter is devoted to describing
 
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   <SPAN
 
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CLASS="PRODUCTNAME"
 
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>PostgreSQL</SPAN
 
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>'s statistics collector,
 
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   but one should not neglect regular Unix monitoring programs such as
 
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   <TT
 
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CLASS="COMMAND"
 
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>ps</TT
 
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>, <TT
 
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CLASS="COMMAND"
 
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>top</TT
 
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>, <TT
 
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CLASS="COMMAND"
 
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>iostat</TT
 
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>, and <TT
 
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CLASS="COMMAND"
 
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>vmstat</TT
 
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>.
 
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   Also, once one has identified a
 
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   poorly-performing query, further investigation might be needed using
 
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   <SPAN
 
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CLASS="PRODUCTNAME"
 
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>PostgreSQL</SPAN
 
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>'s <A
 
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HREF="sql-explain.html"
 
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>EXPLAIN</A
 
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> command.
 
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   <A
 
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HREF="using-explain.html"
 
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>Section 14.1</A
 
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> discusses <TT
 
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CLASS="COMMAND"
 
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>EXPLAIN</TT
 
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>
 
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   and other methods for understanding the behavior of an individual
 
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   query.
 
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  </P
 
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></DIV
 
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><DIV
 
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CLASS="NAVFOOTER"
 
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><HR
 
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ALIGN="LEFT"
 
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WIDTH="100%"><TABLE
 
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SUMMARY="Footer navigation table"
 
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WIDTH="100%"
 
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BORDER="0"
 
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CELLPADDING="0"
 
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CELLSPACING="0"
 
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><TR
 
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><TD
 
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WIDTH="33%"
 
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ALIGN="left"
 
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VALIGN="top"
 
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><A
 
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HREF="standby-settings.html"
 
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ACCESSKEY="P"
 
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>Prev</A
 
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></TD
 
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><TD
 
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WIDTH="34%"
 
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ALIGN="center"
 
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VALIGN="top"
 
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><A
 
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HREF="index.html"
 
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ACCESSKEY="H"
 
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>Home</A
 
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></TD
 
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><TD
 
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WIDTH="33%"
 
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ALIGN="right"
 
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VALIGN="top"
 
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><A
 
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HREF="monitoring-ps.html"
 
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ACCESSKEY="N"
 
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>Next</A
 
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></TD
 
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></TR
 
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><TR
 
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><TD
 
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WIDTH="33%"
 
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ALIGN="left"
 
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VALIGN="top"
 
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>Standby Server Settings</TD
 
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><TD
 
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WIDTH="34%"
 
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ALIGN="center"
 
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VALIGN="top"
 
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><A
 
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HREF="admin.html"
 
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ACCESSKEY="U"
 
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>Up</A
 
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></TD
 
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><TD
 
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WIDTH="33%"
 
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ALIGN="right"
 
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VALIGN="top"
 
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>Standard Unix Tools</TD
 
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></TR
 
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></TABLE
 
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></DIV
 
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></BODY
 
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></HTML
 
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>
 
 
b'\\ No newline at end of file'