[DERBY-3791] Excessive memory usage when fetching small Clobs

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 10.2.2.0, 10.3.1.4, 10.4.1.3, 10.5.1.1
• Fix Version/s: 10.4.2.0, 10.5.1.1
• Component/s: JDBC
• Bug behavior facts: Performance, Regression
• Assignee: Kristian Waagan
• Reporter: Kristian Waagan
• Created: 22/Jul/08 08:52
• Updated: 01/Jul/09 16:28
• Resolved: 05/Aug/08 17:22

Description

When investigating DERBY-3312 I found out that performance with the embedded driver has decreased a lot as well.
Analysis on trunk indicate excessive memory usage, causing high allocation and garbage collection costs.

I believe there was another major performance problem in 10.3, but it appears fixed in trunk. I have not spent time identifying this problem.

Issue Links

• is related to: DERBY-3312 Local Network Server Performance degradation with 10.2 or later