| From: | "Tang, Haiying" <tanghy(dot)fnst(at)cn(dot)fujitsu(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)fujitsu(dot)com>, "Jamison, Kirk" <k(dot)jamison(at)fujitsu(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, "Andres Freund" <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | RE: [Patch] Optimize dropping of relation buffers using dlist |
| Date: | 2020-12-25 05:41:09 |
| Message-ID: | fa6b710c1b3b4d86a46d0a35f792393e@G08CNEXMBPEKD05.g08.fujitsu.local |
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| Lists: | pgsql-hackers |
Hi Amit,
>I think one table with a varying amount of data is sufficient for the vacuum test.
>I think with more number of tables there is a greater chance of variation.
>We have previously used multiple tables in one of the tests because of the
>Truncate operation (which uses DropRelFileNodesAllBuffers that takes multiple relations as input)
>and that is not true for Vacuum operation which I suppose you are testing here.
Thanks for your advice and kindly explanation. I'll continue the threshold test with one single table.
Regards,
Tang
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