Tips for large databases
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Large data files, what to do, and what not to do.
Loading the file
Inital import of a large (100.000+) database from either gramps format or gedcom is tiresome and can take a few hours. You will need to adjust the number of allowable locks. For 140.000 people you should use: max_locks 300000 and max_objects 300000
The easiest way to do this is to:
- create a new Family Tree
- exit gramps
- add a DB_CONFIG to the database directory before importing (see gramps -l output for the directory of a specific family tree.
Contents of this DB_CONFIG file should be:
#may want to fiddle with cachesize also #set_cachesize 0 200000000 2 set_lk_max_locks 300000 set_lk_max_objects 300000
Default view: bookmarks and active person
As there are many people, loading the person view might take some time. See a comparison of performance on large datasets, between different Gramps versions.
You can circumvent this load time by going to the relationships view before opening the family tree. This will open the active person and their family extremely fast, independent of the amount of data you gathered.
You can add bookmarks to common people, or in the branch you are researching. This allows to change person in the relationships view without the need to activate the person in the person view first.
Avoid gramplets which do a lot of database work. The Deep Connections Gramplet seems to be the worst case. These gramplets slow everything down enormously.
Avoid general filters
Filters search all the data looking for the people who satisfy your query. Try to avoid this on large files.
Fast search can be done by enabling column search (disable Sidebar on View menu), but this will search all letters on words into the column, not only the first letters.
For a surname search:
- click on a person in the people view. Now start typing the family name of the person you need. The view will automatically go to the family name as you complete your typing.
- for a more detailed search, use the keyboard shortcut CTRL+F. This will expand all the nodes and allows to search more specifically.
Flat views are faster than Tree views
Using a large database and person treeview needs to often rebuild the view.
Flat person view (list) is faster.
Avoid relationship calculation
Under the preferences dialog, go the to tab item, and select the option to display the name on the status bar instead of the relationship with the home person.
If you have more tips for working with large databases, please share them here.