Re: [HACKERS] Reducing pg_ctl's reaction time

Поиск
Список
Период
Сортировка
От Jeff Janes
Тема Re: [HACKERS] Reducing pg_ctl's reaction time
Дата
Msg-id CAMkU=1xJW8e+CTotojOMBd-yzUvD0e_JZu2xHo=MnuZ4__m7Pg@mail.gmail.com
обсуждение исходный текст
Ответ на Re: [HACKERS] Reducing pg_ctl's reaction time  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: [HACKERS] Reducing pg_ctl's reaction time  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-hackers
On Mon, Jun 26, 2017 at 12:15 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
Michael Paquier <michael.paquier@gmail.com> writes:
> On Mon, Jun 26, 2017 at 7:13 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> The attached proposed patch adjusts pg_ctl to check every 100msec,
>> instead of every second, for the postmaster to be done starting or
>> stopping.

>> +#define WAITS_PER_SEC  10      /* should divide 1000000 evenly */

> As a matter of style, you could define 1000000 as well in a variable
> and refer to the variable for the division.

Good idea, done that way.  (My initial thought was to use USECS_PER_SEC
from timestamp.h, but that's declared as int64 which would have
complicated matters, so I just made a new symbol.)

> This also pops up more easily failures with 001_stream_rep.pl without
> a patch applied from the other recent thread, so this patch had better
> not get in before anything from
> https://www.postgresql.org/message-id/8962.1498425057@sss.pgh.pa.us.

Check.  I pushed your fix for that first.

Thanks for the review!

                        regards, tom lane



The 10 fold increase in log spam during long PITR recoveries is a bit unfortunate.

9153  2017-06-26 12:55:40.243 PDT FATAL:  the database system is starting up
9154  2017-06-26 12:55:40.345 PDT FATAL:  the database system is starting up
9156  2017-06-26 12:55:40.447 PDT FATAL:  the database system is starting up
9157  2017-06-26 12:55:40.550 PDT FATAL:  the database system is starting up
...

I can live with it, but could we use an escalating wait time so it slows back down to once a second after a while?

Cheers,

Jeff

В списке pgsql-hackers по дате отправления:

Предыдущее
От: Tomas Vondra
Дата:
Сообщение: Re: [HACKERS] Pluggable storage
Следующее
От: Tom Lane
Дата:
Сообщение: Re: [HACKERS] Reducing pg_ctl's reaction time