converting comics takes 99% CPU

franklekens · 10-18-2009, 02:43 PM

When I try to convert a cbr file, Calibre starts hogging all my system resources, to the point that it's hard even to shut the programme down. (In the task manager, I see about 6 "calibre-parallel" exe's running, four of which each take up 24 to 25% CPU). That's not really ideal.

Maybe there's something wrong with the cbr files I tried it on, but this way I can't even find out (unless I leave the computer churning for an indefinite period -- I don't know how long since the programme doesn't give an estimate of that).

If so, I'd prefer a simple error dialogue that I can click away. This way it's hard even to get to the process manager and shut the process down.

itimpi · 10-18-2009, 05:02 PM

Have you set the option in Preferences to run the calibre-parallel processes at lower priorities? I actually run Calibre itself at BelowNormal priority and the calibre-parallel processes at Low priority. That way even though conversions might take a little longer my machine remains resposnisve.

Nate the great · 10-18-2009, 05:40 PM

Quote:

Originally Posted by franklekens

When I try to convert a cbr file, Calibre starts hogging all my system resources, to the point that it's hard even to shut the programme down. (In the task manager, I see about 6 "calibre-parallel" exe's running, four of which each take up 24 to 25% CPU). That's not really ideal.

Maybe there's something wrong with the cbr files I tried it on, but this way I can't even find out (unless I leave the computer churning for an indefinite period -- I don't know how long since the programme doesn't give an estimate of that).

If so, I'd prefer a simple error dialogue that I can click away. This way it's hard even to get to the process manager and shut the process down.

This is normal. I see it every time I convert an ebook (no matter the format).

franklekens · 10-19-2009, 03:56 AM

Quote:

Originally Posted by itimpi

Have you set the option in Preferences to run the calibre-parallel processes at lower priorities? I actually run Calibre itself at BelowNormal priority and the calibre-parallel processes at Low priority. That way even though conversions might take a little longer my machine remains resposnisve.

Running Calibre itself at belownormal, do you do that through the task manager? Or is that in the preferences somewhere too?

acidzebra · 10-19-2009, 04:33 AM

Quote:

Originally Posted by franklekens

Running Calibre itself at belownormal, do you do that through the task manager? Or is that in the preferences somewhere too?

Code:

START /BELOWNORMAL Calibre.exe

You could put it in a batch file.

itimpi · 10-19-2009, 10:15 AM

Attached is a batch file I use to start Calibre on Windows. There are plenty of comments so you should be able to tweak it to suit your locations.

Note that I also use this batch file to run in "Calibre on a Stick" mode when I want to run from a USB stick.

I assume the same ideas will work on both Mac and Linux - although the syntax of some of the command might change slightly.

oroig · 10-20-2009, 04:33 PM

is there any easy option to set this low priority on mac in an easy way. every time I convert a comic book my macbook pro it's burning

itimpi · 10-20-2009, 07:53 PM

You can set the priority of the background calibre jobs under Calibre->Preferences->General.

10-18-2009, 02:43 PM	#1
franklekens Addict Posts: 398 Karma: 3421956 Join Date: Sep 2009 Device: various Kobo's, Onyx Note2, Pocketbook 360, Kindle Keyboard	converting comics takes 99% CPU When I try to convert a cbr file, Calibre starts hogging all my system resources, to the point that it's hard even to shut the programme down. (In the task manager, I see about 6 "calibre-parallel" exe's running, four of which each take up 24 to 25% CPU). That's not really ideal. Maybe there's something wrong with the cbr files I tried it on, but this way I can't even find out (unless I leave the computer churning for an indefinite period -- I don't know how long since the programme doesn't give an estimate of that). If so, I'd prefer a simple error dialogue that I can click away. This way it's hard even to get to the process manager and shut the process down.

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10-18-2009, 05:02 PM	#2
itimpi Wizard Posts: 4,553 Karma: 950151 Join Date: Nov 2008 Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)	Have you set the option in Preferences to run the calibre-parallel processes at lower priorities? I actually run Calibre itself at BelowNormal priority and the calibre-parallel processes at Low priority. That way even though conversions might take a little longer my machine remains resposnisve.

10-20-2009, 04:33 PM	#7
oroig Junior Member Posts: 4 Karma: 10 Join Date: May 2009 Device: Sony PRS-505	is there any easy option to set this low priority on mac in an easy way. every time I convert a comic book my macbook pro it's burning

10-20-2009, 07:53 PM	#8
itimpi Wizard Posts: 4,553 Karma: 950151 Join Date: Nov 2008 Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)	You can set the priority of the background calibre jobs under Calibre->Preferences->General.

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