如何监控Tomcat的性能

feiyuw 发表于 2008-4-24 18:01:53

这里只给出基本思路和实现，在Tomcat6和Linux下检验通过。
基本思路：利用Tomcat自带的Status页面
基本实现步骤：

[*]打开Tomcat的status页面，方法为编辑Tomcat的conf目录下的tomcat-users.xml文件，在文件中添加
<tomcat-users>
<role rolename="manager"/>
<user username="admin" password="pass" roles="manager"/>
</tomcat-users>
这里的password和username请自行修改，保存之后重启tomcat，打开http://localhost:8080/manager/status就可以看到status页面了[*]通常我们需要读取的是另一个页面，即http://localhost:8080/manager/status?XML=true，这样整个服务器的性能数据就以一个单行的xml文件形式表示了。[*]接下来我们需要读取这个页面的信息，然后对其进行xml或者字符串分析和处理，以取得我们需要的性能数据[*]上面得到的只是当前情况下的性能数据，要获得一个阶段的性能数据，必须设定采样频率，定时读取，将数据汇总并分析[*]接下来我们还可以对得到数据进行生成图表等操作
上面是一个粗略的实现步骤，下面给出一个简单的例子来说明，为了简单起见，没有采用Java等重量级语言，而是通过Linux自带的Bash来实现，绘制图表采用的是Gnuplot。以下为具体实现：#========================================================================
# Author: Charlse.Zhang
# Email: feiyuw＠gmail.com
# File Name: /home/zhang/Develop/BashWork/perftools/tomcatPerfMonitor.sh
# Description:
# Monitor the performance of tomcat server
# Method: Get the content of status page, analyze and collect the
# result, then give the report
# Edit History:
# 2008-04-24 File created.
#========================================================================
#!/bin/bash
# ========================Default Settings===============================
# address of status page
STATUS_ADDR="http://localhost:8080/manager/status?XML=true"
USER="admin"
PASS="pass"
# sample rate, default: 5seconds
SAMPLE_RATE=5
# if press "Ctrl+c", stop monitor
EXIT_SIGNAL=2
# connector to monitor
CONNECTOR="http-8080"
# result directory to store data
RESULT_DIR="/tmp"
# perf data file
PERF_DATA="perf_data"
# jvm data file
JVM_DATA="jvm_data"
# connector data file
CONNECTOR_DATA="connector_data"
# thread data file
THREAD_DATA="thread_data"
# request data file
REQUEST_DATA="request_data"

# ===========================Output Error Message========================
# Show Error Message and exit, get one parameter
errorMsg()
{
   if [[ $# -eq 1 ]]; then
            echo "Runtime Error: $1"
            exit 1
   else
            echo "Function Error: errorMsg"
            exit 127
   fi
}

# =========================Get Data Function=============================
# Get performance data, no parameter wanted
getPerfData()
{
   cd $RESULT_DIR
   wget --http-user="$USER" --http-password="$PASS" "$STATUS_ADDR" -O "$PERF_DATA" || errorMsg "Failed to get data, please check the connection"
   # JVM data
   sed 's/.*<jvm>//g;s/<\/jvm>.*//g' $PERF_DATA | awk -F \' '{ print $2, $4, $6 }' >> $JVM_DATA
   # 'Connector data
   sed 's/.*'$CONNECTOR'.>//g;s/<\/connector>.*//g' $PERF_DATA >> $CONNECTOR_DATA
   # Thread data
   sed 's/.*<threadInfo//g;s/\/>.*//g' $CONNECTOR_DATA | awk -F \" '{ print $2, $4, $6 }' >> $THREAD_DATA
   # " Request data
   sed 's/.*<requestInfo//g;s/\/>.*//g' $CONNECTOR_DATA | awk -F \" '{ print $2, $4, $6, $8, $10, $12 }' >> $REQUEST_DATA

}

# ========================Build Chart Function==========================
# "according the data, build the chart (use gnuplot)
buildChart()
{
   TITLE=""
   OUTPUT=""
   PLOT=""
   YRANGE=""
   case "$1" in
            "jvm" )
            TITLE="JVM"
            OUTPUT="jvm_graph.png"
            PLOT="plot 'jvm_data' using 1 title 'free' w linespoints, \
            'jvm_data' using 2 title 'total' w linespoints,\
            'jvm_data' using 3 title 'max' w linespoints"
            ;;

            "thread" )
            TITLE="Thread"
            OUTPUT="thread_graph.png"
            PLOT="plot 'thread_data' using 1 title 'max threads' w linespoints,\
            'thread_data' using 2 title 'current thread count' w linespoints,\
            'thread_data' using 3 title 'current thread busy' w linespoints"
            ;;

            "request" )
            TITLE="Request"
            YRANGE="[-1:]"
            OUTPUT="request_graph.png"
            PLOT="plot 'request_data' using 1 title 'max time' w linespoints,\
            'request_data' using 2 title 'processing time' w linespoints,\
            'request_data' using 3 title 'request count' w linespoints,\
            'request_data' using 4 title 'error count' w linespoints,\
            'request_data' using 5 title 'bytes received' w linespoints,\
            'request_data' using 6 title 'bytes sent' w linespoints"
            ;;
   esac

   # build graph
   gnuplot <<EOF
   set terminal png small size 480,360
   set title "$TITLE"
   set yrange $YRANGE
   set grid
   set xlabel "timeline (s)"
   set output "$OUTPUT"
   $PLOT
EOF
}

# ========================Build Report Function=========================
# include data and chart, give a readable html report
buildReport()
{
   # build graph jvm, request,thread
   buildChart "jvm" || errorMsg "Function Error: build jvm graph"
   buildChart "thread" || errorMsg "Function Error: build thread graph"
   buildChart "request" || errorMsg "Function Error: build request graph"
   # build html report
}

# ========================Stop Monitor Function
# call buildReport function
stopMonitor()
{
echo "Monitor stopped, and we are building the report ..."
buildReport || errorMsg "Function Error: buildReport"
exit
}

# =============================Main Function=============================
trap "stopMonitor" $EXIT_SIGNAL
while :
do
   getPerfData || errorMsg "Failed to get performance data"
   sleep $SAMPLE_RATE
done上述代码中未实现生成html的报表和为每个测试建立单独目录的功能，有兴趣的可以自行修改。该例子在Bash3.2.25和gnuplot 4.2上调试通过。
附上几张生成的png格式的chart截图

wxxhxy 发表于 2008-5-14 10:15:23

感谢楼主。

收藏。。

tiangou99073 发表于 2008-5-23 14:32:54

:) 不错

ljonathan 发表于 2009-8-28 11:29:36

很强大

yetties2005 发表于 2009-8-28 12:10:45

:lol 加油加油！！！

huiguiziran111 发表于 2010-3-8 11:36:54

感谢楼主啊！！！

pangda 发表于 2010-3-10 11:23:00

好像很强大啊。回头我得试试

zhangshoujing 发表于 2010-3-19 14:39:22

很好，受益匪浅，谢谢楼主了

yuxuan0668 发表于 2010-4-1 15:51:07

:) 谢

fpplzw 发表于 2010-6-29 15:47:47

帖子火了很多年:lol

放任无奈 发表于 2010-6-30 15:52:47

哪位高人能用JAVA改写这个程序

sjl 发表于 2011-7-28 10:49:48

xiaoxing01234 发表于 2012-2-6 13:21:44

今天没事来逛逛

mvvztt 发表于 2012-2-13 15:53:36

看了好像还是不会用~~~

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如何监控Tomcat的性能