DevForce Community Forum : Clearing Entity/Query Cache (memory leak) http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2009 : Clearing Entity/Query Cache (memory leak) Fri, 15 May 2026 15:41:33 -700 Wed, 18 May 2011 15:36:50 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=2686 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Clearing Entity/Query Cache (memory leak) : Good to know, Paul. Let me know... http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10749#10749 Author: robertg
Subject: 2686
Posted: 18-May-2011 at 3:36pm

Good to know, Paul. Let me know if you run into any other oddities, and we'll see what we can find.

]]> Wed, 18 May 2011 15:36:50 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10749#10749 Clearing Entity/Query Cache (memory leak) : Using version 3.7.1.0 Ah indeed... http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10748#10748 Author: tooms
Subject: 2686
Posted: 18-May-2011 at 3:26pm

Using version 3.7.1.0
 
Ah indeed RemoveEntities does indeed work, that's good news.
 
I also started cleaing my grid controls data/binding source and that seems to make the .Clear() calls work, but they take longer to cleanup than RemoveEntities.
 
I'm not yet convinced, I still have definite memory leaks ... But there may be other culprits.
 
Cheers,
Paul Twomey
MEX
]]> Wed, 18 May 2011 15:26:27 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10748#10748 Clearing Entity/Query Cache (memory leak) : Paul, Do you still see... http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10744#10744 Author: robertg
Subject: 2686
Posted: 18-May-2011 at 12:03pm

Paul,
 
Do you still see this symptom if you use RemoveEntities instead? Also, what version of DevForce 2009 are you using, and is there any chance you could upload your test solution for me to take a look at? I'll certainly test this to see if there's a problem, but it might just be that the cleanup hasn't occurred yet. I don't know when garbage collection occurs for Clear and will ask.
 
-- Robert


Edited by robertg - 18-May-2011 at 12:23pm]]> Wed, 18 May 2011 12:03:08 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10744#10744 Clearing Entity/Query Cache (memory leak) : I'm investigating memory... http://www.ideablade.com/forum/forum_posts.asp?TID=2686&PID=10728#10728 Author: tooms
Subject: 2686
Posted: 17-May-2011 at 3:21pm

I'm investigating memory leaks within our application and set up a small test app to narrow them down.
 
When I grab data using the PeristenceManager I can see the increase in memory use equivelant to the amount of data retrived. However when I clear those entities from the cache, the memory does not decrease. If the entities are grabbed again, the memory is increased by the same amount. If I continue this loop I can blowout memory use to the point where the application fails.
 
I have two questions.
 
I clear the cache using QueryCache.Clear() and DataSet.Clear()  ... Is this the correct way to do so?
 
and if this is the correct way, then it appears there is a memory leak within Ideablade. If a query increased memory use by 50mb (example only) and I then clear that cache, that 50mb is not released. Grabbing that data again increases memory use by another 50mb (100mb in total).
 
Cheers,
Paul Twomey
MEX
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