| From: | "tanghy(dot)fnst(at)fujitsu(dot)com" <tanghy(dot)fnst(at)fujitsu(dot)com> |
|---|---|
| To: | Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Zhihong Yu <zyu(at)yugabyte(dot)com>, Luc Vlaming <luc(at)swarm64(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com> |
| Subject: | RE: Parallel Inserts in CREATE TABLE AS |
| Date: | 2021-03-19 07:15:25 |
| Message-ID: | OS0PR01MB6113F6FF2B6BC473BDEC8B47FB689@OS0PR01MB6113.jpnprd01.prod.outlook.com |
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| Lists: | pgsql-hackers |
From: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
>I analyzed performance of parallel inserts in CTAS for different cases
>with tuple size 32bytes, 59bytes, 241bytes and 1064bytes. We could
>gain if the tuple sizes are lower. But if the tuple size is larger
>i..e 1064bytes, there's a regression with parallel inserts.
Thanks for the update.
BTW, May be you have some more testcases that can reproduce this regression easily.
Can you please share some of the testcase (with big tuple size) with me.
Regards,
Tang
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