Re: Deleting older versions in unique indexes to avoid page splits

From: Victor Yegorov <vyegorov(at)gmail(dot)com>
To: Peter Geoghegan <pg(at)bowt(dot)ie>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Deleting older versions in unique indexes to avoid page splits
Date: 2020-11-17 15:16:50
Message-ID: CAGnEboiVtEc88AEv8oXJ0XBWwQgSM7r2FM9j_ePpSuxAZ_ryJA@mail.gmail.com
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чт, 12 нояб. 2020 г. в 23:00, Peter Geoghegan <pg(at)bowt(dot)ie>:

> Another thing that I'll probably add to v8: Prefetching. This is
> probably necessary just so I can have parity with the existing
> heapam.c function that the new code is based on,
> heap_compute_xid_horizon_for_tuples(). That will probably help here,
> too.
>

I don't quite see this part. Do you mean top_block_groups_favorable() here?

--
Victor Yegorov

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