| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | peter plachta <pplachta(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: High QPS, random index writes and vacuum |
| Date: | 2023-04-18 02:49:59 |
| Message-ID: | CA+hUKGLcrtugqiuPdBKzd8Pcrkt0uu4y+3NqDt1xjd+H+Y2PtQ@mail.gmail.com |
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| Lists: | pgsql-performance |
On Tue, Apr 18, 2023 at 2:43 PM peter plachta <pplachta(at)gmail(dot)com> wrote:
> I was trying to understand whether there are any known workarounds for random access + index vacuums. Are my vacuum times 'normal' ?
Ah, it's not going to help on the old versions you mentioned, but for
what it's worth: I remember noticing that I could speed up vacuum of
uncorrelated indexes using parallel vacuum (v13), huge_pages=on,
maintainance_work_mem=BIG, min_dynamic_shared_memory=BIG (v14),
because then the memory that is binary-searched in random order avoids
thrashing the TLB.
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