| From: | "Yotsunaga, Naoki" <yotsunaga(dot)naoki(at)jp(dot)fujitsu(dot)com> |
|---|---|
| To: | 'Phil Florent' <philflorent(at)hotmail(dot)com>, 'Michael Paquier' <michael(at)paquier(dot)xyz> |
| Cc: | 'Tomas Vondra' <tomas(dot)vondra(at)2ndquadrant(dot)com>, "'pgsql-hackers(at)lists(dot)postgresql(dot)org'" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | RE: [Proposal] Add accumulated statistics |
| Date: | 2018-11-13 00:47:11 |
| Message-ID: | 8E9126CB6CE2CD42962059AB0FBF7B0DC635D5@g01jpexmbkw23 |
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| Lists: | pgsql-hackers |
On Mon, Nov 5, 2018 at 4:26 PM, Naoki Yotsunaga wrote:
>>2) it consumes system resources
>While the system is running, you are always sampling system information, do not you? Like Oracle ASH.
I don’t understand well how sampling is used.
In which scene do you use the sampling? Or is it both scenes? Or is it a different scene?
A) Perform sampling in order to obtain information on the entire DB while DB is in operation.
B) I know roughly the process to be late. When investigating the reason for delaying the processing, sampling is performed on the processing.
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Naoki Yotsunaga
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