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Eclipse Memory Analyzer Guide for Debugging Java Memory Issues

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The document discusses Eclipse Memory Analyzer, a tool for analyzing Java heap dumps and system dumps. It can simplify memory analysis of large heap dumps, provide automated detection of memory leak suspects, and allow exploration of OSGi bundles in an application. Key features include a dominator tree for identifying retained memory, a query language, and adapters for analyzing different dump formats like IBM system dumps.

Technology
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Eclipse Memory Analyzer – More Than Just a Heap Walker Andrew Johnson (IBM) Elena Nayashkova (SAP)
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A Little Bit of History ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object]
IBM Dumps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo ,[object Object],[object Object],[object Object],[object Object],[object Object]
Demo ,[object Object],[object Object],[object Object],[object Object]
Report Overview Any up-to-date architecture loads components with separate class loaders, be it OSGi or JEE application servers. Extensible to display meaningful names. Classification for trouble ticket system: less ping-pong of trouble tickets. Search by keywords: identify if problem is known One big object: memory leak suspect
Report Details Accumulated objects A significant drop in the retained sizes shows the accumulation point The chain of objects and references which keep the suspect alive
Demo ,[object Object],[object Object],[object Object],[object Object]
Report Details
Report Details
Equinox OSGi Bundle Explorer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo ,[object Object],[object Object],[object Object],[object Object],[object Object]
What’s Next? ,[object Object],[object Object],[object Object]
Thank You! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Binary Heap Dump ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],For Your Reference IOIOII IOIIOI OIOIO IIOIIOI IOIOII IOIIOI OIOIO IIOIIOI
How to Get a Heap Dump ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],For Your Reference
Shallow and Retained Size ,[object Object],[object Object],[object Object],For Your Reference Set of elements Retained Set C C, F, G, J K K C, K C, F, G, J, K, I
Dominator Tree ,[object Object],[object Object],[object Object],For Your Reference ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Eclipse Memory Analyzer Guide for Debugging Java Memory Issues

  • 1. Eclipse Memory Analyzer – More Than Just a Heap Walker Andrew Johnson (IBM) Elena Nayashkova (SAP)
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  • 8. Report Overview Any up-to-date architecture loads components with separate class loaders, be it OSGi or JEE application servers. Extensible to display meaningful names. Classification for trouble ticket system: less ping-pong of trouble tickets. Search by keywords: identify if problem is known One big object: memory leak suspect
  • 9. Report Details Accumulated objects A significant drop in the retained sizes shows the accumulation point The chain of objects and references which keep the suspect alive
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