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Old 02-05-2020, 09:36 AM   #1
luoto
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Slow with large library
Hello.

Is there any way to optimize existing indices as Calibre (latest version on Mac OSX 10.14) is now quite slow with a very large library of various books. Moving to SSD is no option for the storage side of things, but if Calibre's indices can live on an SSD that may make things faster?!?

Adding new books has a noticeable delay whilst the computer (an otherwise powerful Mac Pro with lots of memory) does its stuff.

I did not find any obivous pointers with search at least !
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Old 02-05-2020, 09:55 AM   #2
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calibre keeps its indice in RAM. Hide the Tag browser. Dont use columns built from other columns.
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Old 02-05-2020, 10:02 AM   #3
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calibre keeps its indice in RAM. Hide the Tag browser. Dont use columns built from other columns.
Thank you for the prompt response. Blindingly fast.

I do not have tag browser visible. I use only default columns and have not tried to make any custom views. Tags is shown as one of the (default) view columns in the view where you see what books are available (but I only have a few different tag names, I don't extensively use the tagging feature/more for internal source signposting).

I have 128Gb of RAM on this Mac Pro so it shouldn't be complaining about memory fortunately.

Is there anything else I can do/or a report to submit that may help you with further development of this excellent application?

Thank you!
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Old 02-05-2020, 10:04 AM   #4
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The tag browser is the panel on the left of the book list. Have you hidden that? And how large is "large library". i.e. how many books.
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Old 02-05-2020, 10:12 AM   #5
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and Tame your Anti-whatever. Those (book) files have been already scanned, so turn off Real time scanning on your Library folder (I leave it for the whole system scan)
FWIW I just got a new PC. I copied my Library over my LAN. Pausing the A/V on the new PC DOUBLED THE TRANSFER SPEED
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Old 02-05-2020, 10:40 AM   #6
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The tag browser is the panel on the left of the book list. Have you hidden that? And how large is "large library". i.e. how many books.
Yes it is hidden. I just have the text menu on the left-hand side. 53k-ish books in the library.
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Old 02-05-2020, 03:29 PM   #7
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Yes it is hidden. I just have the text menu on the left-hand side. 53k-ish books in the library.
"text menu on the left-hand side" - not sure what you mean ? Can you post a screen shot

53,000+ items is not a particularly big library, I have one that's 180,000+, I've seen others users mention libraries of a million items.

What sort of files (formats) are you adding, and how big are they? The files added get copied into the library sub-folders. My experience is that the time taken to add an item is a function of the size of the file being added, e.g. a 100K epub novel/biography takes a couple of seconds, whilst a 1G video clip might take 10-20 seconds.

BR
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Old 02-05-2020, 03:38 PM   #8
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Well, HDD is slow, nothing to be done about that. Why not move to SSD? I have over 20 000 books in my library and it takes less than a tenth of my 500 GB SSD. SSD is not so expensive today as it once was.
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Old 02-05-2020, 06:11 PM   #9
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@luoto how any eBooks do you have in this slow library?
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Old 02-05-2020, 07:00 PM   #10
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Quote:
Originally Posted by luoto View Post
Yes it is hidden. I just have the text menu on the left-hand side. 53k-ish books in the library.
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@luoto how any eBooks do you have in this slow library?
Sheesh.... He already said 53K-ish books.
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Old 02-06-2020, 02:16 AM   #11
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Thanks for the other comments folks, that are noted. The books vary in size from maybe a megabyte for an ePub or less to say 20-50 megabytes if a PDF, taking about 680Gb of disk space. Moving to SSD for that drive is not presently a viable option as it is a much larger HDD with other items on that would need rehoming and already the drive bays are maxed out space-wise.
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Old 02-06-2020, 03:16 AM   #12
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Quote:
Originally Posted by luoto View Post
Thanks for the other comments folks, that are noted. The books vary in size from maybe a megabyte for an ePub or less to say 20-50 megabytes if a PDF, taking about 680Gb of disk space. Moving to SSD for that drive is not presently a viable option as it is a much larger HDD with other items on that would need rehoming and already the drive bays are maxed out space-wise.
Yes, if you have a lot of PDFs, then the storage space will be a problem. My library is less than 50 GB, but I have very few PDFs.

Your only option would seem to be splitting the library. Put the books you rarely need on an external drive and the rest on a SSD.
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Old 02-06-2020, 04:04 AM   #13
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Thank you all, once again, for the advice given.
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Old 02-06-2020, 04:26 AM   #14
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Quote:
Originally Posted by luoto View Post
Thanks for the other comments folks, that are noted. The books vary in size from maybe a megabyte for an ePub or less to say 20-50 megabytes if a PDF, taking about 680Gb of disk space. Moving to SSD for that drive is not presently a viable option as it is a much larger HDD with other items on that would need rehoming and already the drive bays are maxed out space-wise.
You've not told us how long it actually takes to Add a 1MB epub and a 50MB PDF.

BR
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Old 02-06-2020, 04:34 AM   #15
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You've not told us how long it actually takes to Add a 1MB epub and a 50MB PDF.

BR
About 14-20 seconds for a 25mb PDF (just tested one) and about 25 seconds for a 40mb ePuB. The status bar sits at zero percent for a time then rushes to 100 per cent and sits there for a second or two. All other file accesses on the system seem to be normal, e.g. opening Word documents, moving the files with Finder and the like. I guess I just must split the library until a move to a larger capacity SSD is possible and practical (the last time I looked multiple tb drives were very expensive).
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