Stephane Bailliez <sbailliez(at)gmail(dot)com> writes:
> FWIW forgot to mention, chance of memory issue is low, memory was
> entirely changed a couple of days ago while upgrading from 1GB to 4GB
Hmm, did this all start happening after the RAM upgrade? If so I'd say
the odds are real good that you got some bad memory there.
regards, tom lane