From: | Philip Warner <pjw(at)rhyme(dot)com(dot)au> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Chris Bitmead <chrisb(at)nimrod(dot)itg(dot)telstra(dot)com(dot)au>, "pgsql-hackers(at)postgreSQL(dot)org" <pgsql-hackers(at)postgreSQL(dot)org> |
Subject: | Re: Re: [GENERAL] PostgreSQL vs. MySQL |
Date: | 2000-07-10 05:12:27 |
Message-ID: | 3.0.5.32.20000710151227.0240d1d0@mail.rhyme.com.au |
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Lists: | pgsql-general pgsql-hackers |
At 01:02 10/07/00 -0400, Tom Lane wrote:
>
>> You could pre-start servers (ala Apache), then when a connection request
>> comes in, the connection should be pretty fast. This would involve
>> defining, for each database, the number of servers to prestart (default 0),
>
>since there's no portable way for the postmaster
>to pass off a client socket to an already-existing backend.
That's a pain, because you probably don't want to vary the postmaster
behaviour that much.
Couldn't you modify the connection protocol to request the port of a free
db server, then redo the connect invisibly inside the front end?
The postmaster would have to manage free servers, and mark the db server as
used etc etc.
>It occurs to me that this'd get a whole lot more feasible if one
>postmaster == one database, which is something we *could* do if we
>implemented schemas. Hiroshi's been arguing that the current hard
>separation between databases in an installation should be done away
>with in favor of schemas, and I'm starting to see his point...
This has other advantages too - I'd like to be able to shutdown *one*
database, and possibly restart it in 'administrator mode' (eg. for a
restore operation). It also means one misbehaving DB doesn't mess up other
DBs. Sounds very good to me.
Does this mean there would be a postmaster-master that told you the
postmaster port to connect to for the desired DB? Or is there a nicer way
of doing this...
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