G1GC and finalizer queue

[Hongkai Liu]

Hi,


our application (Gerrit) consumes more and more memory and Yourkit showed up with 18M Jdbc4PreparedStatement<http://grepcode.com/file/repo1.maven.org/maven2/postgresql/postgresql/9.1-901.jdbc4/org/postgresql/jdbc4/Jdbc4PreparedStatement.java> objects in "pending finalization" which uses up 21G of mem.

The heap is taken immediately after two GCs.


I wonder why those objects survived of GCs.

According to Yourkit doc<https://www.yourkit.com/docs/java/help/reachability.jsp>,  the objects in "pending finalization" are from the class with an implemenation of finalize() method while Jdbc4PreparedStatement<http://grepcode.com/file/repo1.maven.org/maven2/postgresql/postgresql/9.1-901.jdbc4/org/postgresql/jdbc4/Jdbc4PreparedStatement.java> is without it.

Is it about G1GC?


Any hint is appreciated.


BR,

Hongkai


================================


Here are the screenshots of Yourkit and App info.

[cid:82499a3c-9de5-4ae9-b0f3-c9f2e173aa40]

[cid:5dd8cdb6-7736-4294-9bc5-698ad47ecf29]

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