> On Feb 7, 2020, at 12:39 PM, Alfonso Perez <f...@revenuecat.com> wrote: > > Hi list, > > We have attempted to use Bucardo to migrate from PG9.6 to PG11 in AWS > Aurora[1], but unfortunately, after about an hour of running sync, > locking queries start piling up like crazy until the DB becomes > unreachable, a failover is triggered, and we are able to drop the > bucardo schema, resolving the locking, which gets the DB healthy > again.
Hi Alfonso, So to confirm, the sync got added successfully, it added all of the triggers, etc, and this is happening in the initial copy phase? > Any tips on where to start trying to figure out the cause? > Unfortunately, I do not have available backups of the database when > the schema was created, and bucardo logs don't show anything > meaningful. I’d look at locks initially. Broadly speaking for a workaround, you could look at adding the sync without the onetimecopy option and transfer the data out-of-band for the initial pgdump. > [1] bucardo add sync pg11migration relgroup=alpha > dbs=aurora9:source,aurora11:target onetimecopy=2 > conflict_strategy=bucardo_source BTW, you will not need to specify a conflict strategy if there is only a single source. Best, David -- David Christensen Senior Software and Database Engineer End Point Corporation da...@endpoint.com 785-727-1171
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