RE: Libpq support to connect to standby server as priority - Mailing list pgsql-hackers

From Tsunakawa, Takayuki
Subject RE: Libpq support to connect to standby server as priority
Date
Msg-id 0A3221C70F24FB45833433255569204D1FB98624@G01JPEXMBYT05
Whole thread Raw
In response to Re: Libpq support to connect to standby server as priority  (Haribabu Kommi <kommi.haribabu@gmail.com>)
Responses Re: Libpq support to connect to standby server as priority
List pgsql-hackers
From: Haribabu Kommi [mailto:kommi.haribabu@gmail.com]
>     No.  It's not good if the user has to be bothered by
> default_transaction_read_only when he simply wants to a standby.
> 
> 
> 
> OK. Understood.
> so if we are going to differentiate between readonly and standby types,
> then I still
> feel that adding a prefer-read to target_session_attrs is still valid
> improvement.

I agree that it's valid improvement to add prefer-read to target_session_attr, as a means to "get a read-only
session."

> But the above improvement can be enhanced once the base work of GUC_REPORT
> is finished.

Is it already in progress in some thread, or are you trying to start from scratch?  (I may have done it, but I don't
rememberit well...)
 

> Yes, I want to work on this patch, hopefully by next commitfest. In case
> if I didn't get time,
> I can ask for your help.

I'm glad to hear that.  Sure.  I'd like to review your patch, and possibly add/modify code if necessary.  Are you going
toadd target_server_type={primary | standby | prefer_standby} as well as add prefer-read to target_session_attr?
 


>     (I wonder which of server_type or server_role feels natural in
> English.)
> 
> 
> 
> server_type may be good as it stands with connection option
> (target_server_type).

Thanks, agreed.  That also follows PgJDBC's targetServerType.


Regards
Takayuki Tsunakawa


pgsql-hackers by date:

Previous
From: "Tsunakawa, Takayuki"
Date:
Subject: RE: Protect syscache from bloating with negative cache entries
Next
From: Tom Lane
Date:
Subject: Re: Using POPCNT and other advanced bit manipulation instructions