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ConcurrentHashMap.ConnectionPhantomReference in NonRegisteringDriver is removed to old space
Posted by: leiwangdl wang
Date: January 27, 2015 04:35AM

Dear,

I have accessed mysql use DBCP+mysql-connector-java-5.1.34, and jvm young space is enough(10GB), -XX:MaxTenuringThreshold for jvm is setted as 32, young gc is happened every 30min, db-connection's minEvictableIdleTimeMillis that it is a paramter in dbcp is setted as 2min.

I think all db-connection object and its ConnectionPhantomReference is recovered while minor-gc happen, but ConnectionPhantomReference is moved to jvm old space after 32 minor-gc, and then it grow regularly every day.

I think there is strong refrence in ConcurrentHashMap to ConnectionPhantomReference object.

Above,

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ConcurrentHashMap.ConnectionPhantomReference in NonRegisteringDriver is removed to old space
leiwangdl wang
January 27, 2015 04:35AM


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