On 11/29/2011 10:40 PM, Tom Lane wrote:
> Prevent autovacuum transactions from running in serializable mode.
>
> Force the transaction isolation level to READ COMMITTED in autovacuum
> worker and launcher processes. There is no benefit to using a higher
> isolation level, and doing so could result in delaying foreground
> transactions (or maybe even causing unnecessary serialization failures?).
> Noted by Dan Ports.
>
> Also, make sure we disable zero_damaged_pages and statement_timeout in
> the autovac launcher, not only workers. Now that the launcher can run
> transactions, these settings could affect its behavior, and it seems
> like the same arguments apply to the launcher as the workers.
>
>
Looks like this broke the buildfarm.
cheers
andrew