386398 – perf: make use of concurrent processing to improve performance

Some Eclipse Foundation services are deprecated, or will be soon. Please ensure you've read this important communication.

Bug 386398 - perf: make use of concurrent processing to improve performance

Summary: perf: make use of concurrent processing to improve performance

Status:	NEW

Alias:	None

Product:	z_Archived
Classification:	Eclipse Foundation
Component:	Eclipselink (show other bugs)
Version:	unspecified
Hardware:	PC Windows 7

Importance:	P3 enhancement with 2 votes (vote)
Target Milestone:	---
Assignee:	Nobody - feel free to take it
QA Contact:

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2012-08-01 11:08 EDT by James Sutherland
Modified:	2022-06-09 10:26 EDT (History)
CC List:	3 users (show)

See Also:

Attachments
patch - adds concurrent session option (107.35 KB, patch) 2012-08-01 11:13 EDT, James Sutherland	no flags	Details \| Diff
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description James Sutherland

2012-08-01 11:08:13 EDT

Investigate various usages of concurrent processing to improve performance on multi-cpu machines.

Comment 1 James Sutherland

2012-08-01 11:13:33 EDT

Created attachment 219442 [details]
patch - adds concurrent session option

Comment 2 James Sutherland

2012-08-01 11:28:46 EDT

Git push, main - Bug#386398 - performance and concurrency

(first Git push, hopefully this goes ok...)

https://bugs.eclipse.org/bugs/show_bug.cgi?id=386398

This patch make a few minor optimizations and provides some initial experimental concurrency options.

Code review: Andrei (pending)

Changes:
-	Cleaned up IdentityMap hierarchy constructors, updated test cases.
-	Remove accessor shouldUseThreadCursors option, moved to Session isConcurrent
-	Fixed DescriptorIterator to use more efficient getItems in attribute group
-	Moved load to ObjectBuilder/mappings instead of using descriptor iterator, so is more efficient
-	Added special buildObjects for ThreadCursors
-	Fixed ThreadCursoredList to allow iteration
-	Allowed cache cleanup to occur on concurrent thread for concurrent sessions
-	Added concurrent option to LoadGroup
-	Added load group test
-	Fixed (hopefully) Oracle cast char test failure
-	Removed finalizer from EntityTransaction (finalizer cause major concurrency/gc issues), added option to use finalizer

Comment 3 Eclipse Webmaster

2022-06-09 10:26:37 EDT

The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink