Re: Fixing pgbench init overflow

From: Japin Li <japinli(at)hotmail(dot)com>
To: Chen Hao Hsu <johnhyvr(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org, pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Fixing pgbench init overflow
Date: 2023-12-23 05:23:44
Message-ID: ME3P282MB316684190982F54BDBD4FE90B69BA@ME3P282MB3166.AUSP282.PROD.OUTLOOK.COM
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On Sat, 23 Dec 2023 at 07:18, Chen Hao Hsu <johnhyvr(at)gmail(dot)com> wrote:
> Hello,
>
> pgbench mixes int and int64 to initialize the tables.
> When a large enough scale factor is passed, initPopulateTable
> overflows leading to it never completing, ie.
>
> 2147400000 of 2200000000 tuples (97%) of
> pgbench_accounts done (elapsed 4038.83 s, remaining 98.93 s)
> -2147400000 of 2200000000 tuples (-97%) of
> pgbench_accounts done (elapsed 4038.97 s, remaining -8176.86 s)
>
>
> Attached is a patch that fixes this, pgbench -i -s 22000 works now.

I think only the following line can fix this.

+ int64 k;

Do not need to modify the type of `n`, right?

--
Regrads,
Japin Li
ChengDu WenWu Information Technology Co., Ltd.

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