Обсуждение: New function to show index being vacuumed
Hi,
[1] is a ready-for-committer enhancement to pg_stat_progress_vacuum which exposes
the total number of indexes to vacuum and how many indexes have been vacuumed in
the current vacuum cycle.
To even further improve visibility into index vacuuming, it would be beneficial to have a
function called pg_stat_get_vacuum_index(pid) that takes in a pid and returns the
indexrelid of the index being processed.
Currently the only way to get the index being vacuumed by a process
Is through os tools such as pstack.
I had a patch for this as part of [1], but it was decided to handle this in a separate
discussion.
Comments/feedback will be appreciated before sending out a v1 of the patch.
Regards,
Sami Imseih
Amazon Web Services (AWS)
1. https://www.postgresql.org/message-id/flat/5478DFCD-2333-401A-B2F0-0D186AB09228@amazon.com
On Thu, 22 Jun 2023 at 16:45, Imseih (AWS), Sami <simseih@amazon.com> wrote: > > Hi, > > [1] is a ready-for-committer enhancement to pg_stat_progress_vacuum which exposes > the total number of indexes to vacuum and how many indexes have been vacuumed in > the current vacuum cycle. > > To even further improve visibility into index vacuuming, it would be beneficial to have a > function called pg_stat_get_vacuum_index(pid) that takes in a pid and returns the > indexrelid of the index being processed. I'm sorry for not having read (and not reading) the other thread yet, but what was the reason we couldn't store that oid in a column in the pg_s_p_vacuum-view? Could you summarize the other solutions that were considered for this issue? Kind regards, Matthias van de Meent Neon, Inc.
> I'm sorry for not having read (and not reading) the other thread yet, > but what was the reason we couldn't store that oid in a column in the > pg_s_p_vacuum-view? > Could you summarize the other solutions that were considered for this issue? Thanks for your feedback! The reason we cannot stick the oid in pg_s_p_vacuum is because it will not work for parallel vacuum as only the leader process has an entry in pg_s_p_vacuum. With a function the leader or worker pid can be passed in to the function and will return the indexrelid being processed. Regards, Sami