# Best way to merge two databases with large overlaps?

**URL:** https://discourse.jabref.org/t/best-way-to-merge-two-databases-with-large-overlaps/3267
**Category:** Help
**Created:** [February 28, 2022, 10:22am UTC](https://discourse.jabref.org/t/best-way-to-merge-two-databases-with-large-overlaps/3267 "2022-02-28T10:22:42Z")
**Posts on this page:** 1
**Showing post:** 9

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### Author: ![impracticaldogg](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/impracticaldogg/32/1329_2.png) [@impracticaldogg](https://discourse.jabref.org/u/impracticaldogg)
#### Post date: [March 1, 2022, 11:43am UTC](https://discourse.jabref.org/t/best-way-to-merge-two-databases-with-large-overlaps/3267/9 "2022-03-01T11:43:46Z")

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I may not actually need to do a full merge. Just a quick comparison of entries (would love to export author, year, title in flat files), import to a conventional database and then run a join.

I had found that entries from one author present in previous libraries (Zotero and Mendeley) were not found when I searched in JabRef (“No entries present”). This seems to be an intermittent issue that occurs when I have hundreds of megabytes of swap memory under Ubuntu. I’ve also seen it under Windows.

My browser keeps chewing up more and more memory over time. If I don’t keep it open I don’t have this problem in JabRef

I have 8GB physical memory and a similar amount of swap under Ubuntu, so it isn’t a hardware issue

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