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World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: Memory Usage Question |
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Thread Status: Active Total posts in this thread: 5
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I've just decided to switch to BOINC client and I don't understand one thing.
Under BOINC Device Profiles I've setup 'Leave applications in memory while preempted?' to 'No'. I'm not sure what that means exactly but I've noticed that when project is suspended (user is active) and when looking at task manager the project process is sometimes there and sometimes not. It doesn't use processor but has some 20 to 90 MB of memory usage . Is that normal or not? Also, a related question. When project process is in paused/suspended mode and sitting there in task manager would that cause PC to slow down when user is active? thanks... |
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retsof
Former Community Advisor USA Joined: Jul 31, 2005 Post Count: 6824 Status: Offline Project Badges: 
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Leaving projects in memory is only a factor when running multiple BOINC projects from other places and they are swapped in and out as the other one starts running. Some projects are sensitive to being swapped out of memory and others don't care.
----------------------------------------If you are only running WCG by itself it really isn't a big deal. If the project is suspended it may just be checking to see whether YOU are doing anything.  Even if the project is running, it should get out of the way if the user wants to do something. It DOES cause my computer to slow down if it is uploading/downloading, since I am on dialup here, which takes a high percentage of the cycles when this happens. I have one other application that takes 99% of the CPU when it is doing maintenance. BOINC totally stops in that case here.
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----------------------------------------Work+GPU i7 8700 12threads School i7 4770 8threads Default+GPU Ryzen 7 3700X 16threads Ryzen 7 3800X 16 threads Ryzen 9 3900X 24threads Home i7 3540M 4threads50% [Edit 1 times, last edit by retsof at Apr 15, 2007 9:50:40 PM] |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
The short answer is applying to BOINC 5.8 is, that until the first checkpoint is received, the job is kept in memory regardless the choice. Else if a user would continuously switch from active to inactive, an unload would result in a job never making progress.
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WCG
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
And what about those check points? How many are there per job? Are they distributed proportionally to progress?
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
This thread is over 2 years old. Allot has change since then with the science applications. For some projects they are nice and evenly spread, for others they are variably spaced since non-deterministic calculations are involved. You can have them written to the message log to see when the last one was. The frequency is influenced by the speed of the computer. E.g. a CEP on a stock Q6600 is about every 13 minutes, but on a centrino that becomes every 20 minutes or so. For more detail info visit the Start Here FAQ, specifically the checkpoint saving FAQ and the Matrix.
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WCG
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