Memory Issue - MIDI.

Arnar · 03-13-2017, 01:10 PM

I am editing MIDI files , I import say 90 .mid files as native Reaper midi format. When I start cutting them up , editing and have maybe reached 180 midi files it takes about 10-13 gig in ram and Reaper gets very slow.

I am only using Geist as kick , and Sylenth as a synth, very basic midi editing session and yet its suuuper slow.
Feels like this should be a breeze and not a problem.

At 8 gig , if i open the action list it just hangs.
Also it will eventually crash and takes forever to load.

Any ideas ?

schwa · 03-13-2017, 01:24 PM

Feel free to post the .RPP here, or email it to support at cockos.

Arnar · 03-13-2017, 01:46 PM

The .rpp's are from 740mb to 2 gig ?
Which is weird , just a bunch of tiny midi files ?

Arnar · 03-13-2017, 01:51 PM

Its very simple to reproduce.

Import ca 90 one measure midi files.
Implode all files into one - (90 takes) ,duplicate to next measure and switch takes.

Keep doing this until you reach around take 30 and its starts to eat up memory ...60 and I am at almost 4 gig.
At take 30 it starts to take a few seconds to duplicate and switch takes.

At this point , if I search action list, it hangs.
And when it crashes , its stuck in task manager at 7 gig.
Needs a restart.

EvilDragon · 03-13-2017, 02:53 PM

Quote:

Originally Posted by Arnar

The .rpp's are from 740mb to 2 gig ?
Which is weird , just a bunch of tiny midi files ?

Pack them to RAR, they should compress much better since RPPs are just text mostly.

Arnar · 03-13-2017, 04:53 PM

OK, will do

Arnar · 03-13-2017, 05:17 PM

Here's a dropbox link 34mb.
This one sits at almost 12 gig in memory.
https://dl.dropboxusercontent.com/u/...xtract%203.rar

schwa · 03-14-2017, 06:49 AM

Thanks for posting the project. The RPP contains about 159 million lines so it's difficult to even analyze. I can say that it contains 8660 separate MIDI takes, many of which are copies of the same MIDI source data which itself contains about 18000 MIDI events. 8660*18000 = about 155 million.

18000 MIDI events for a song-length MIDI file is on the high side but not unreasonable. Having 8660 instances of the full-length MIDI data is probably unnecessary. You could reduce this various ways. If you are making many copies of a long MIDI file in order to use different, small parts of it in different places, you could use pooled copies (so that only one copy of the full-length item is stored in the RPP), or you could glue the smaller pieces (so that each small piece does not store a full copy of the full-length item). If you absolutely need thousands of copies of a full-length MIDI file, you should import the MIDI as file reference rather than in-project items.

Arnar · 03-14-2017, 08:29 AM

155 million ! Thats nothing :P

Ok, will try some things to make this easier.

ivansc · 03-14-2017, 09:15 AM

Quote:

Originally Posted by Arnar

I am editing MIDI files , I import say 90 .mid files as native Reaper midi format. When I start cutting them up , editing and have maybe reached 180 midi files it takes about 10-13 gig in ram and Reaper gets very slow.

I am only using Geist as kick , and Sylenth as a synth, very basic midi editing session and yet its suuuper slow.
Feels like this should be a breeze and not a problem.

At 8 gig , if i open the action list it just hangs.
Also it will eventually crash and takes forever to load.

Any ideas ?

Just being nosey here, but have you done this successfully in any other DAW?