[Archivesspace_Users_Group] Spreadsheet imports locking up database

[Peter Heiner]

Dear list users,

The Cambridge University Library AS instance has recently been hit with severe performance issues while users were running spreadsheet imports to add archival objects, details are in https://github.com/archivesspace/archivesspace/issues/2275; the summary is that a DELETE query with a dependent subquery running for every line of the spreadsheet input seems to make concurrent database access near impossible.

Has anyone else experienced anything similar? Us using MariaDB instead of MySQL might well be the cause, but I'd like confirmation before work is scheduled to migrate the database that this will indeed help. If you're using spreadsheet imports, we'd be grateful if you could let us know either on or off list whether you use MySQL or MariaDB and if you had any problems with the migration queries hogging the database.

Thanks,
p
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