Re: Proposal: backend "niceness" / session_priority - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Proposal: backend "niceness" / session_priority
Date
Msg-id 22356.1438271682@sss.pgh.pa.us
Whole thread Raw
In response to Proposal: backend "niceness" / session_priority  (José Luis Tallón <jltallon@adv-solutions.net>)
Responses Re: Proposal: backend "niceness" / session_priority  (Jim Nasby <Jim.Nasby@BlueTreble.com>)
List pgsql-hackers
José Luis Tallón <jltallon@adv-solutions.net> writes:
>      Since PostgreSQL lacks the resource management capabilities of the 
> "Big Ones" ( Resource Groups - Red, WorkLoad Manager - Blue ) or the 
> Resource Governor in MS SQL Server, we can try and approximate the 
> requested behaviour by reducing the CPU priority ("nice") of the backend 
> in question. Please note that we would be using scheduler priority to 
> try and modulate I/O, though I'm aware of the limitations of this mechanism.

This has been proposed before, and rejected before, and I'm not seeing
anything particularly new here.  Without a credible mechanism for
throttling I/O, "nice" alone does not seem very promising.
        regards, tom lane



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