Re: Performance comparison between Pgsql 10.5 and Pgsql 11.2

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От Nicola Contu
Тема Re: Performance comparison between Pgsql 10.5 and Pgsql 11.2
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Msg-id CAMTZZh39S_miLXFXRTOGEa51e5ZJ6=r7U8DT5Cb_Ed3yUxQuxA@mail.gmail.com
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Ответ на Re: Performance comparison between Pgsql 10.5 and Pgsql 11.2  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Performance comparison between Pgsql 10.5 and Pgsql 11.2  (Thomas Munro <thomas.munro@gmail.com>)
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Attached a part of the strace running the pgbench command for pg11
Also attached strace_10 for pg10.6.

Thanks

Il giorno lun 4 mar 2019 alle ore 15:22 Tom Lane <tgl@sss.pgh.pa.us> ha scritto:
Nicola Contu <nicola.contu@gmail.com> writes:
> See attached perf report. The difference seems to be all in this line, but
> not sure :
> +   26.80%     0.00%           222  postmaster       [kernel.kallsyms]
>               [k] system_call_fastpath

That would suggest that many more kernel calls are happening, which is
something you could usefully investigate with strace, perhaps.

                        regards, tom lane
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