Error with check library, out of memory

zardoxnet · 04-09-2026, 11:12 PM

MacOS (Latest)
Calibre 9.6
menu
_Calibre_master -> Library Maintenance -> Check Library

when running it gives an error that the system has run out of memory. I need to force quit.

It seems there is adequate storage 10gb on hard drive. No other application open. I have reboot and attempted several times.

Any help? I did not yet submit as a bug as this may only be on my system.

zardoxnet · 04-12-2026, 10:59 PM

With Calibre 9.7.0 this is somewhat better, though not entirely fixed. I initiate "Check Library" then OK to "Check the database file". It runs for short while (30 seconds perhaps) and I get a success message. Then I get the usual "Check library -- Problems found" dialog and I click done. That seems as it was before. HOWEVER. A spinning MacOS icon is shown for about a minute before it is completed and Calibre released for further use -- I don't think it was like that before. Its ok then, doesn't cause crash, just a delay after running.

elaysee · 04-28-2026, 08:38 PM

I just dropped by to run a search for the issue I'm seeing, which sounds similar:

- I ran Check Library on my recent DB rebuild following a system migration, and the memory went completely through the roof - at one point calibre was showing as high as 60 GB of memory used, mostly swap. After a couple of minutes of the spinning disc icon, calibre became responsive again, and showed 42 GB of memory used, still a lot of swap. I closed and restarted calibre and now it's showing 430 MB of memory used.

Calibre 9.6, macOS 26.4.1

04-09-2026, 11:12 PM	#1
zardoxnet Junior Member Posts: 6 Karma: 10 Join Date: Dec 2016 Device: android phone	Error with check library, out of memory MacOS (Latest) Calibre 9.6 menu _Calibre_master -> Library Maintenance -> Check Library when running it gives an error that the system has run out of memory. I need to force quit. It seems there is adequate storage 10gb on hard drive. No other application open. I have reboot and attempted several times. Any help? I did not yet submit as a bug as this may only be on my system.

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04-12-2026, 10:59 PM	#2
zardoxnet Junior Member Posts: 6 Karma: 10 Join Date: Dec 2016 Device: android phone	With Calibre 9.7.0 this is somewhat better, though not entirely fixed. I initiate "Check Library" then OK to "Check the database file". It runs for short while (30 seconds perhaps) and I get a success message. Then I get the usual "Check library -- Problems found" dialog and I click done. That seems as it was before. HOWEVER. A spinning MacOS icon is shown for about a minute before it is completed and Calibre released for further use -- I don't think it was like that before. Its ok then, doesn't cause crash, just a delay after running.

04-28-2026, 08:38 PM	#3
elaysee Groupie Posts: 172 Karma: 1319590 Join Date: Jun 2012 Device: iPad/MapleRead	I just dropped by to run a search for the issue I'm seeing, which sounds similar: - I ran Check Library on my recent DB rebuild following a system migration, and the memory went completely through the roof - at one point calibre was showing as high as 60 GB of memory used, mostly swap. After a couple of minutes of the spinning disc icon, calibre became responsive again, and showed 42 GB of memory used, still a lot of swap. I closed and restarted calibre and now it's showing 430 MB of memory used. Calibre 9.6, macOS 26.4.1

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