mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-17 18:53:42 +02:00
233 lines
7.9 KiB
Plaintext
233 lines
7.9 KiB
Plaintext
From mscott@sacadia.com Wed Nov 15 14:50:19 2000
|
|
Received: from goldengate.kojoworldwide.com. ([216.133.4.130])
|
|
by candle.pha.pa.us (8.9.0/8.9.0) with ESMTP id OAA11583
|
|
for <pgman@candle.pha.pa.us>; Wed, 15 Nov 2000 14:50:13 -0500 (EST)
|
|
Received: from localhost (localhost [127.0.0.1])
|
|
by goldengate.kojoworldwide.com. (8.9.1b+Sun/8.9.2) with ESMTP id LAA09998;
|
|
Wed, 15 Nov 2000 11:35:33 -0800 (PST)
|
|
Date: Wed, 15 Nov 2000 11:35:33 -0800 (PST)
|
|
From: Myron Scott <mscott@sacadia.com>
|
|
X-Sender: mscott@goldengate.kojoworldwide.com.
|
|
To: "Mikheev, Vadim" <vmikheev@SECTORBASE.COM>,
|
|
Bruce Momjian <pgman@candle.pha.pa.us>, Tom Lane <tgl@sss.pgh.pa.us>
|
|
Subject: Please help with some advice
|
|
Message-ID: <Pine.GSO.4.10.10011151053260.9940-100000@goldengate.kojoworldwide.com.>
|
|
MIME-Version: 1.0
|
|
Content-Type: TEXT/PLAIN; charset=US-ASCII
|
|
Status: ORr
|
|
|
|
Dear Sirs,
|
|
|
|
I have been lurking on the PostgreSQL hackers list for about 3 months now
|
|
and your names comes up more than any with helpful info about the project
|
|
so I was hoping you could help me.
|
|
|
|
Let me cut to the chase. I have been experimenting with 7.0.2 source to
|
|
see if I could create a mutlti-threaded version of the backend so
|
|
I could link directly from java ( I have a fe<->be protocol that I use for
|
|
my apps). Needless to say I got into much more than I bargained for. I
|
|
now have a version that works and it has some nice benefits that are very
|
|
helpful to a project that I am working on. What I gained was
|
|
|
|
prepared statements outside of spi
|
|
batched commits (fsync)
|
|
one connection per thread
|
|
multiple threads per process
|
|
multiple processes per installation
|
|
|
|
I never really intended for anyone else to see the work so I drifted
|
|
pretty far from the original code. I also ended up using Solaris threads
|
|
rather than pthreads, I did my own implementation of the bufmgr.c and
|
|
gram.y, and used Solaris implementation of mutex in place of S_LOCK and
|
|
TAS. I grabbed all global variables and put them in an environment
|
|
variable that is thread local. I also did some really stupid
|
|
things like making TransactionId uint64 and making all my inserts use the
|
|
same oid.
|
|
|
|
My question is this. I would like to get some critical feedback and
|
|
suggestions about the work from others. What is the best way to go about
|
|
this? I thought about trying to create a project on greatbridge.org
|
|
but I am rather new to open source and the code needs commented properly
|
|
and cleaned up before too many try and look at it.
|
|
|
|
Any suggestions would be greatly appreciated.
|
|
|
|
|
|
Thanks in advance,
|
|
|
|
Myron Scott
|
|
|
|
|
|
|
|
From mscott@sacadia.com Thu Nov 16 17:19:45 2000
|
|
Received: from goldengate.kojoworldwide.com. ([216.133.4.130])
|
|
by candle.pha.pa.us (8.9.0/8.9.0) with ESMTP id RAA04315
|
|
for <pgman@candle.pha.pa.us>; Thu, 16 Nov 2000 17:19:43 -0500 (EST)
|
|
Received: from localhost (localhost [127.0.0.1])
|
|
by goldengate.kojoworldwide.com. (8.9.1b+Sun/8.9.2) with ESMTP id OAA11449;
|
|
Thu, 16 Nov 2000 14:05:15 -0800 (PST)
|
|
Date: Thu, 16 Nov 2000 14:05:15 -0800 (PST)
|
|
From: Myron Scott <mscott@sacadia.com>
|
|
X-Sender: mscott@goldengate.kojoworldwide.com.
|
|
To: Bruce Momjian <pgman@candle.pha.pa.us>
|
|
cc: "Mikheev, Vadim" <vmikheev@SECTORBASE.COM>, Tom Lane <tgl@sss.pgh.pa.us>
|
|
Subject: Re: Please help with some advice
|
|
In-Reply-To: <200011160533.AAA27886@candle.pha.pa.us>
|
|
Message-ID: <Pine.GSO.4.10.10011161401570.11441-100000@goldengate.kojoworldwide.com.>
|
|
MIME-Version: 1.0
|
|
Content-Type: TEXT/PLAIN; charset=US-ASCII
|
|
Status: OR
|
|
|
|
Bruce Momjian wrote:
|
|
|
|
>I am curious how you isolated each thread. It seems we pretty much
|
|
>assume all our memory is controlled by a single query in the process.
|
|
|
|
|
|
I moved all global variables to a thread global variable which is accessed
|
|
by the method GetEnv(). Which looks like this
|
|
|
|
Env* GetEnv(void) {
|
|
Env* env;
|
|
thr_getspecific(*envkey,(void*)&env);
|
|
return env;
|
|
}
|
|
|
|
The Env struct includes the CurrentMemoryContext, TopMemoryContext,
|
|
PortalHeapMemory for each instance of a connection (one thread per
|
|
connection). So, for example,
|
|
EndPortalAllocMode uses GetEnv()->CurrentMemoryContext
|
|
|
|
void
|
|
EndPortalAllocMode()
|
|
{
|
|
PortalHeapMemory context;
|
|
|
|
AssertState(PortalManagerEnabled);
|
|
AssertState(IsA(GetEnv()->CurrentMemoryContext,
|
|
PortalHeapMemory));
|
|
|
|
context = (PortalHeapMemory) GetEnv()->CurrentMemoryContext;
|
|
AssertState(PointerIsValid(context->block)); /* XXX
|
|
Trap(...) */
|
|
|
|
/* free current mode */
|
|
AllocSetReset(&HEAPMEMBLOCK(context)->setData);
|
|
MemoryContextFree((MemoryContext)
|
|
PortalHeapMemoryGetVariableMemory(context),
|
|
context->block);
|
|
|
|
/* restore previous mode */
|
|
context->block = FixedStackPop(&context->stackData);
|
|
}
|
|
|
|
|
|
|
|
|
|
From vmikheev@SECTORBASE.COM Thu Nov 16 17:23:22 2000
|
|
Received: from sectorbase2.sectorbase.com ([208.48.122.131])
|
|
by candle.pha.pa.us (8.9.0/8.9.0) with SMTP id RAA04562
|
|
for <pgman@candle.pha.pa.us>; Thu, 16 Nov 2000 17:23:21 -0500 (EST)
|
|
Received: by sectorbase2.sectorbase.com with Internet Mail Service (5.5.2650.21)
|
|
id <V8XQB5RW>; Thu, 16 Nov 2000 14:05:24 -0800
|
|
Message-ID: <8F4C99C66D04D4118F580090272A7A234D318D@sectorbase1.sectorbase.com>
|
|
From: "Mikheev, Vadim" <vmikheev@SECTORBASE.COM>
|
|
To: "'Myron Scott'" <mscott@sacadia.com>,
|
|
Bruce Momjian
|
|
<pgman@candle.pha.pa.us>
|
|
Cc: Tom Lane <tgl@sss.pgh.pa.us>
|
|
Subject: RE: Please help with some advice
|
|
Date: Thu, 16 Nov 2000 14:09:30 -0800
|
|
MIME-Version: 1.0
|
|
X-Mailer: Internet Mail Service (5.5.2650.21)
|
|
Content-Type: text/plain;
|
|
charset="iso-8859-1"
|
|
Status: ORr
|
|
|
|
I think the question do we want to make backend multy-threaded
|
|
should be discussed in hackers.
|
|
|
|
Vadim
|
|
|
|
> -----Original Message-----
|
|
> From: Myron Scott [mailto:mscott@sacadia.com]
|
|
> Sent: Thursday, November 16, 2000 2:05 PM
|
|
> To: Bruce Momjian
|
|
> Cc: Mikheev, Vadim; Tom Lane
|
|
> Subject: Re: Please help with some advice
|
|
>
|
|
>
|
|
> Bruce Momjian wrote:
|
|
>
|
|
> >I am curious how you isolated each thread. It seems we pretty much
|
|
> >assume all our memory is controlled by a single query in the process.
|
|
>
|
|
>
|
|
>
|
|
> I moved all global variables to a thread global variable
|
|
> which is accessed
|
|
> by the method GetEnv(). Which looks like this
|
|
>
|
|
> Env* GetEnv(void) {
|
|
> Env* env;
|
|
> thr_getspecific(*envkey,(void*)&env);
|
|
> return env;
|
|
> }
|
|
>
|
|
> The Env struct includes the CurrentMemoryContext, TopMemoryContext,
|
|
> PortalHeapMemory for each instance of a connection (one thread per
|
|
> connection). So, for example,
|
|
> EndPortalAllocMode uses GetEnv()->CurrentMemoryContext
|
|
>
|
|
> void
|
|
> EndPortalAllocMode()
|
|
> {
|
|
> PortalHeapMemory context;
|
|
>
|
|
> AssertState(PortalManagerEnabled);
|
|
> AssertState(IsA(GetEnv()->CurrentMemoryContext,
|
|
> PortalHeapMemory));
|
|
>
|
|
> context = (PortalHeapMemory) GetEnv()->CurrentMemoryContext;
|
|
> AssertState(PointerIsValid(context->block)); /* XXX
|
|
> Trap(...) */
|
|
>
|
|
> /* free current mode */
|
|
> AllocSetReset(&HEAPMEMBLOCK(context)->setData);
|
|
> MemoryContextFree((MemoryContext)
|
|
> PortalHeapMemoryGetVariableMemory(context),
|
|
> context->block);
|
|
>
|
|
> /* restore previous mode */
|
|
> context->block = FixedStackPop(&context->stackData);
|
|
> }
|
|
>
|
|
>
|
|
>
|
|
|
|
From mscott@sacadia.com Thu Nov 16 22:16:38 2000
|
|
Received: from goldengate.kojoworldwide.com. ([216.133.4.130])
|
|
by candle.pha.pa.us (8.9.0/8.9.0) with ESMTP id WAA14638
|
|
for <pgman@candle.pha.pa.us>; Thu, 16 Nov 2000 22:16:36 -0500 (EST)
|
|
Received: from localhost (localhost [127.0.0.1])
|
|
by goldengate.kojoworldwide.com. (8.9.1b+Sun/8.9.2) with ESMTP id TAA11874;
|
|
Thu, 16 Nov 2000 19:04:48 -0800 (PST)
|
|
Date: Thu, 16 Nov 2000 19:04:48 -0800 (PST)
|
|
From: Myron Scott <mscott@sacadia.com>
|
|
X-Sender: mscott@goldengate.kojoworldwide.com.
|
|
To: Bruce Momjian <pgman@candle.pha.pa.us>
|
|
cc: "Mikheev, Vadim" <vmikheev@SECTORBASE.COM>, Tom Lane <tgl@sss.pgh.pa.us>
|
|
Subject: Re: Please help with some advice
|
|
In-Reply-To: <200011170156.UAA11438@candle.pha.pa.us>
|
|
Message-ID: <Pine.GSO.4.10.10011161904140.11870-100000@goldengate.kojoworldwide.com.>
|
|
MIME-Version: 1.0
|
|
Content-Type: TEXT/PLAIN; charset=US-ASCII
|
|
Status: ORr
|
|
|
|
Thanks very much, I will post to hackers.
|
|
|
|
Myron
|
|
|
|
|
|
|