Meaning of message "operations coalesced during safepoint"

Posted by elec on Stack Overflow See other posts from Stack Overflow or by elec
Published on 2010-05-17T15:44:17Z Indexed on 2010/05/17 17:30 UTC
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java

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gc

A java app runs with the following flag: -XX:+PrintSafepointStatistics, and then produces the following line on the standard output console:

2 VM operations coalesced during safepoint

Anyone cares to explain what this mean ?

More generally - is there a Java reference manual somewhere detailling all JVM flags, their use and, most importantly, the expected output, with relevant explanations ?

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