Re: autovacuum can't keep up, bloat just continues to rise

On 07/19/2017 03:29 PM, Tom Lane wrote:
> "Joshua D. Drake" <jd(at)commandprompt(dot)com> writes:
>> At PGConf US Philly last week I was talking with Jim and Jan about
>> performance. One of the items that came up is that PostgreSQL can't run
>> full throttle for long periods of time. The long and short is that no
>> matter what, autovacuum can't keep up. This is what I have done:
>
> Try reducing autovacuum_vacuum_cost_delay more, and/or increasing
> autovacuum_vacuum_cost_limit.

I would try
autovacuum_vacuum_cost_delay = 0
and for any tables > 1 million rows:
autovacuum_vacuum_scale_factor: 0
autovacuum_vacuum_threshold: 100000 (perhaps even smaller)

Joe

--
Crunchy Data - http://crunchydata.com
PostgreSQL Support for Secure Enterprises
Consulting, Training, & Open Source Development