[JCR-1186] Improve estimation of retained memory size of caches managed by CacheManager

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.3.3
• Component/s: jackrabbit-core
• Assignee: Unassigned
• Reporter: Martijn Hendriks
• Created: 24/Oct/07 12:53
• Updated: 24/Oct/07 12:53

Description

Currently, the estimation of the sizes of the caches that the CacheManager manages is not very accurate. The sizes of properties are estimated in PropertyState.calculateMemoryFootprint() to be 350 + values.length * 100. This is really bad when you have a lot of non-binary properties that are significantly larger than 100 bytes.

Proposed solution: Extend InternalValue and BlobFileValue with a much more accurate estimation of the retained memory and use this in PropertyState.calculateMemoryFootprint(). This would give a much better estimation of the retained size of the caches.