[BOOKKEEPER-578] LedgerCacheImpl is reserving 1/3 of Heap size but allocates NonHeap memory

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.4.0
• Component/s: bookkeeper-server
• Assignee: Matteo Merli
• Reporter: Matteo Merli
• Created: 27/Feb/13 01:02
• Updated: 16/May/16 21:47
• Resolved: 05/Apr/16 06:51

Description

By default the page limit parameter is set to -1, which means to assign 1/3 of Heap space to the LedgerCache. Each LedgerEntryPage is then allocating the memory outside the heap (ByteBuffer.allocateDirect()).

This makes BK to use more memory than the -XmxNN configured setting. Is there any particular reason for the LedgerEntryPage buffer to be allocated outside the java heap? Could that be changed?