[GEODE-1593] optimized offheap size too small for many customers

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0-incubating.M3
• Component/s: docs, offheap
• Assignee: Darrel Schneider
• Reporter: Darrel Schneider
• Created: 24/Jun/16 22:52
• Updated: 22/Aug/16 16:54
• Resolved: 06/Jul/16 18:06

Description

The largest offheap memory allocation that will be optimally reused is 132k. A recent survey of customers found that 35% of them had an average object size greater than 132k. This can be increased by setting the system property "gemfire.OFF_HEAP_FREE_LIST_COUNT". The default for this property is "16384". This results in the jvm heap allocating a single array of this size.

If this property defaulted to "65535" then we could optimally reuse allocations smaller than 528k.