IBM Monitoring and Diagnostic Tools - GCMV 2.8
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The document outlines the capabilities of the IBM Garbage Collection and Memory Visualizer (GCMV) for Java and Node.js, focusing on monitoring garbage collection, memory usage, and performance analysis. It includes tools for offline memory monitoring, automated analysis, and visualization via the Eclipse client UI, along with shell scripts for data collection. The document also references performance overhead measurements and provides links to IBM's developer kits and additional resources.
![© 2014 International Business Machines Corporation 5
Process and System memory monitoring data
#!/bin/sh
PID=$1
INTERVAL=3
# Echo time at start of monitoring.
echo timestamp = `date +%s`
# Echo the interval frequency.
echo "ps interval = $INTERVAL"
# Run the system command at intervals.
while ([ -d /proc/$PID ]) do
ps -p $PID -o pid,vsz,rss
sleep $INTERVAL
done
#!/bin/sh
PID=$1
INTERVAL=3
# Echo time at start of monitoring.
echo timestamp = `date +%s`
# Echo the interval frequency.
echo "svmon interval = $INTERVAL"
# Run the system command at intervals.
while ([ -d /proc/$PID ]) do
svmon -r -m -P $PID
sleep $INTERVAL
done
#!/bin/sh
PID=$1
INTERVAL=3
# Echo time at start of monitoring.
echo timestamp = `date +%s`
# Echo the interval frequency.
echo "svmon interval = $INTERVAL"
# Run the system command at intervals.
while true ; do
ps -p $PID -o pid,vsz
sleep $INTERVAL
done
Run perfmon
Select “Performance Logs and Alerts > Counter Logs”
Create a log file name, eg. Memory Usage
Click “Add Counters...”
Select “Process > Virtual Bytes” from Counters
Select you process from Instances
Select “Add” and “Close”
Click “Log Files” and “Text File (Comma delimited)”
Select “Schedule” and then “Manually” in Start log
Start logging by clicking “Start”
Linux AIX
Windows zOS
Note: Scripts are provided in the Help documentation](https://image.slidesharecdn.com/gcmv2-150105072909-conversion-gate01/85/IBM-Monitoring-and-Diagnostic-Tools-GCMV-2-8-5-320.jpg)
![© 2014 International Business Machines Corporation 6
Garbage Collection monitoring data
-Xverbosegclog:[FILE_NAME] --trace_gc
--trace_gc_nvp
--trace_gc_verbose
Java : IBM SDKs Node.js
Java: Oracle and Open JDKs
Note: Scripts are provided in the Help documentation
Log verbose GC data to a given file name
-Xverbosegclog:[FILE_NAME],[FILES],[ENTRIES]
Log verbose GC data to a rolling number of files, each
With a maximum number of GC cycle entries
-Xverbosegclog:vgc.%Y%m%d.%H%M%S.%pid.txt
Log data to a file name including token substitutions
-XX:+PrintGCDateStamps
-XX:+PrintGCDetails
-XX:+PrintGCTimeStamps
-Xloggc:[FILE_NAME]
Log verbose GC data to a given file name
Enable collection of date and time stamped GC data
Log detailed verbose GC data to the console
--trace_gc
--trace_gc_nvp
--trace_gc_verbose
[APPLICATION] > [FILE_NAME] 2>&1
Capture the console to a given file name](https://image.slidesharecdn.com/gcmv2-150105072909-conversion-gate01/85/IBM-Monitoring-and-Diagnostic-Tools-GCMV-2-8-6-320.jpg)
IBM Monitoring and Diagnostic Tools - GCMV 2.8
- 1. GCMV 2.8 Memory Analysis for Java and Node.js
- 2. © 2014 International Business Machines Corporation 2 Offline memory monitoring capability for: ● Java and Node.js Garbage Collection (GC) ● Operating System memory usage Provides ability to: ● Monitor process and system memory usage ● Identify application memory usage and leaks ● Analyse and tune GC performance Visualization provided via Eclipse Client UI ● Available from Eclipse Marketplace ● Available from IBM Support Assistant Headless/batch mode ● Run automated analysis IBM Monitoring and Diagnostics: Garbage Collection and Memory Visualizer (GCMV)
- 3. © 2014 International Business Machines Corporation 3 IBM Monitoring and Diagnostics: GCMV Available for Java Available for Node.js Garbage Collection Garbage Collection performance and memory usage Graphical visualization including cropping and zooming Statistical analysis of data Recommendations for tuning garbage collection Memory leak detection Memory Usage Process and System memory usage Graphical visualization including cropping and zooming Statistical analysis of data Memory leak detection
- 4. © 2014 International Business Machines Corporation 4 Collecting Data
- 5. © 2014 International Business Machines Corporation 5 Process and System memory monitoring data #!/bin/sh PID=$1 INTERVAL=3 # Echo time at start of monitoring. echo timestamp = `date +%s` # Echo the interval frequency. echo "ps interval = $INTERVAL" # Run the system command at intervals. while ([ -d /proc/$PID ]) do ps -p $PID -o pid,vsz,rss sleep $INTERVAL done #!/bin/sh PID=$1 INTERVAL=3 # Echo time at start of monitoring. echo timestamp = `date +%s` # Echo the interval frequency. echo "svmon interval = $INTERVAL" # Run the system command at intervals. while ([ -d /proc/$PID ]) do svmon -r -m -P $PID sleep $INTERVAL done #!/bin/sh PID=$1 INTERVAL=3 # Echo time at start of monitoring. echo timestamp = `date +%s` # Echo the interval frequency. echo "svmon interval = $INTERVAL" # Run the system command at intervals. while true ; do ps -p $PID -o pid,vsz sleep $INTERVAL done Run perfmon Select “Performance Logs and Alerts > Counter Logs” Create a log file name, eg. Memory Usage Click “Add Counters...” Select “Process > Virtual Bytes” from Counters Select you process from Instances Select “Add” and “Close” Click “Log Files” and “Text File (Comma delimited)” Select “Schedule” and then “Manually” in Start log Start logging by clicking “Start” Linux AIX Windows zOS Note: Scripts are provided in the Help documentation
- 6. © 2014 International Business Machines Corporation 6 Garbage Collection monitoring data -Xverbosegclog:[FILE_NAME] --trace_gc --trace_gc_nvp --trace_gc_verbose Java : IBM SDKs Node.js Java: Oracle and Open JDKs Note: Scripts are provided in the Help documentation Log verbose GC data to a given file name -Xverbosegclog:[FILE_NAME],[FILES],[ENTRIES] Log verbose GC data to a rolling number of files, each With a maximum number of GC cycle entries -Xverbosegclog:vgc.%Y%m%d.%H%M%S.%pid.txt Log data to a file name including token substitutions -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xloggc:[FILE_NAME] Log verbose GC data to a given file name Enable collection of date and time stamped GC data Log detailed verbose GC data to the console --trace_gc --trace_gc_nvp --trace_gc_verbose [APPLICATION] > [FILE_NAME] 2>&1 Capture the console to a given file name
- 7. © 2014 International Business Machines Corporation 7 Performance Overhead
- 8. © 2014 International Business Machines Corporation 8 Performance Overhead (IBM SDK for Java) Measured using WebSphere App Server and the DayTrader benchmark with 50 clients Running WAS 8.5.5, IBM Java 7 SR5, AIX 7.1, POWER7 Throughput determined by number of completed transactions on 4 saturated CPUs 0 500 1000 1500 2000 2500 3000 3500 4000 Throughput Runs Min Max Stddev Without verbose:gc 3743.953 8 3637.019 3855.971 71.6304964862 With verbose:gc
- 9. © 2014 International Business Machines Corporation 9 Performance Overhead (IBM SDK for Java) Measured using WebSphere App Server and the DayTrader benchmark with 50 clients Running WAS 8.5.5, IBM Java 7 SR5, AIX 7.1, POWER7 Throughput determined by number of completed transactions on 4 saturated CPUs 0 500 1000 1500 2000 2500 3000 3500 4000 Throughput Runs Min Max Stddev Without verbose:gc 3743.953 8 3637.019 3855.971 71.6304964862 With verbose:gc 3748.779 8 3654.9945 3877.9495 83.5641336842 0.1289% ?
- 10. © 2014 International Business Machines Corporation 10 IBM Developer Kits for Java ibm.biz/javasdk WebShere Liberty Profile wasdev.net IBM Bluemix ibm.com/bluemix IBM Developer Kits for Node.js ibm.biz/nodesdk
- 11. © 2014 International Business Machines Corporation 11 References • IBM Monitoring and Diagnostics - Health Center: • https://www.ibm.com/developerworks/java/jdk/tools/gcmv/ • IBM SDKs for Java: • https://www.ibm.com/developerworks/java/jdk/ • IBM SDKs for Node.js: • http://www.ibm.com/developerworks/web/nodesdk/
- 12. © 2014 International Business Machines Corporation 12 Copyrights and Trademarks © IBM Corporation 2014. All Rights Reserved IBM, the IBM logo, ibm.com are trademarks or registered trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at “Copyright and trademark information” at www.ibm.com/legal/copytrade.shtml Node.js is an official trademark of Joyent. IBM SDK for Node.js is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. Java, JavaScript and all Java-based trademarks and logos are trademarks or registered trademarks of Oracle and/or its affiliates.