The Vaccuum process runs on a regular basis and we notice it sometimes blocks Update Data on tables such as Recipient and even an Enrichment activity on Recipient which is basically a select.
The Neolane Support told us :
Does anybody have any suggestion regarding this?
Can it really not be excluded during some time slots like the office hours?
Autovacuum? That doesn't lock tables, and afaik nothing locks read access outside alter table, truncate, vacuum full.
Could just be an undersized db struggling with any load, I see them all the time.
it indeed wasn't the autovaccum causing the issue.