Alvaro,
Thanks for the insight, was really helpful!
Best,
Martín
On Fri, Sep 14th, 2018 at 12:41 PM, Alvaro Herrera
wrote:
>
>
>
> On 2018-Sep-13, Martín Fernández wrote:
>
> > By performing this changes we are going to start relying more heavily
> > on the autovacuum work and the
On 2018-Sep-13, Martín Fernández wrote:
> By performing this changes we are going to start relying more heavily
> on the autovacuum work and the concern of "lost work" caused by
> autovacuum canceling itself when locking contention happen showed up.
> I'm guessing that we might be over thinking
Tom,
Thanks for the detailed explanation. I can start mapping your explanation with
the source code I've been reading :)
We are in the process of tuning our autovacuum settings (on some tables) and
stop relying on crontabs that are performing manual vacuums.
By performing this changes we are
=?UTF-8?q?Mart=C3=ADn_Fern=C3=A1ndez?= writes:
> We basically started a VACUUM on a given table, waited for one index to
> process (captured cleaned rows count) and cancel the VACUUM. When we run
> another VACUUM on the same table the dead rows removed from the first index
> was a number
David,
Your last comment applies for cleaning up indexes as well ? We performed a
simple test in our production database to understand behaviour and we got a
result that surprised us based on your last comment.
We basically started a VACUUM on a given table, waited for one index to process
David,
Thanks a lot for the quick reply.
I clearly misunderstood the references in the code.
Best,
Martín
On Thu, Sep 13th, 2018 at 7:55 PM, "David G. Johnston"
wrote:
>
>
> On Thu, Sep 13, 2018 at 3:45 PM, Martín Fernández < fmarti...@gmail.com >
> wrote:
>
>
>> From what I could
On Thu, Sep 13, 2018 at 3:45 PM, Martín Fernández
wrote:
> From what I could understand (that can be totally wrong), the vacuum
> process is split in multiple small transactions. If the autovacuum is
> canceled, could it be possible that only the latest transaction work be
> lost
>
>From the
Hello,
I'm working on a high volume transaction database and we are starting to tune
our autovacuum setting to improve our vacuuming performance.
Once thing that we know about autovacuum is that is can be automatically
canceled if a dependent transaction is blocked by the autovacuum
