e use of the individual or entity to whom they
are addressed. If you are not the intended recipient, you should not
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Sven Ge
Hi Alexandru,
Alexandru Coseru schrieb:
> [...]
> Question 1:
>The RAID layout should be:
>a) 2 hdd in raid 1 for system and pg_xlog and 6 hdd in
> raid10 for data ?
>b) 8 hdd in raid10 for all ?
>c) 2 hdd in raid1 for system , 2 hdd in raid1 for pg_xl
Hi,
I have to refactoring a 'DELETE FROM x WHERE y IN (...)' because IN got
to much parameters. => 'stack depth limit exceeded'
I don't want to increase just the parameter for max_stack_depth. It is
better to refactoring because the number of arguments to IN may increase
in the future.
My approac
Hi Heikki
Heikki Linnakangas schrieb:
> Sven Geisler wrote:
>> I have to refactoring a 'DELETE FROM x WHERE y IN (...)' because IN got
>> to much parameters. => 'stack depth limit exceeded'
>> I don't want to increase just the parameter for max_st
Linnakangas schrieb:
> Sven Geisler wrote:
>> I have to insert my arguments to a temporary table first, because the
>> arguments are only known in the application tier.
>> Is a multiple insert to a temporary table and a final 'DELETE FROM x
>> WHERE y IN (SELECT z
nks for the advices..
>
> Actually , i'm waiting for the clovertown to show up on the market...
>
> Regards
> Alex
>
> - Original Message -
> From: "Sven Geisler" <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
&g
Hi,
Did someone try '-mfpmath=sse -msse3'?
Would be interesting to know if -mfpmath=sse boost the performance.
I guess, the difference in the generated code isn't that much between
i686 and prescott. The bigger step is i386 to i686. '-mfpmath=sse
-msse3' will also use the SSE unit, which the cla
w, are there any documentation about this.
>
> thomas
>
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> TIP 6: explain analyze is your friend
--
Sven Geisler <[EMAIL PROTECTED]> Tel +49.30.921017.81 Fax .50
Senior Developer, AEC/communications Gmb
Martijn van Oosterhout schrieb:
Last time around there were a number of different algorithms tested.
Did anyone run those tests while getting it to count the number of
actual comparisons (which could easily swamp the time taken to do the
actual sort in some cases)?
The last time I did such te
ded recipient, you should not
copy it, re-transmit it, use it or disclose its contents, but should
return it to the sender immediately and delete your copy from your
system. Thank you for your cooperation./
Sven Geisler <[EMAIL PROTECTED]> Tel +49.30.5362.1627 Fax .1638
Senior De
Hi Guillaume,
Guillaume Smet schrieb:
The server is a dell 6650 from end of 2004 with 4 xeon mp 2.2 and 2MB
cache per proc.
Here are the information from Dell:
4x PROCESSOR, 80532, 2.2GHZ, 2MB cache, 400Mhz, SOCKET F
8x DUAL IN-LINE MEMORY MODULE, 512MB, 266MHz
You should provide det
Hi Guillaume,
Guillaume Smet schrieb:
How much faster is the XEON DP?
Well, on high load, PostgreSQL scales well on the DP (load at 40,
queries slower but still performing well) and is awfully slow on the
MP box.
I know what you mean with awfully slow.
I think, your application is facing con
Hi all,
Vivek Khera schrieb:
> On Apr 25, 2006, at 2:14 PM, Bill Moran wrote:
>> Where I'm stuck is in deciding whether we want to go with dual-core
>> pentiums with 2M cache, or with HT pentiums with 8M cache.
>
> In order of preference:
>
> Opterons (dual core or single core)
> Xeon with HT *di
contents, but should
return it to the sender immediately and delete your copy from your
system. Thank you for your cooperation./
Sven Geisler <[EMAIL PROTECTED]> Tel +49.30.5362.1627 Fax .1638
Senior Developer,AEC/communications GmbHBerlin, Germany
--
Hi all,
Joshua D. Drake schrieb:
Mario Splivalo wrote:
Could you point out to some more detailed reading on why Xeons are
poorer choice than Opterons when used with PostgreSQL?
It isn't just PostgreSQL. It is any database. Opterons can move memory
and whole lot faster then Xeons.
Yes. You
Hi Ruben,
Ruben Rubio Rey schrieb:
Hi,
Im having a problem with postgres 8.1.3 on a Fedora Core 3 (kernel
2.6.9-1.667smp)
I have two similar servers, one in production and another for testing
purposes.
Databases are equal (with a difference of some hours)
In the testing server, an sql se
Installation of a 32-bit PostgreSQL on a 64-bit Linux like RHEL 4 is
very easy. Make sure that you have installed all needed 32-bit libs and
devel packages.
Here is an example to call configure to get a 32-bit PostgreSQL:
CXX="/usr/bin/g++ -m32" \
CPP="/usr/bin/gcc -m32 -E" \
LD="/usr/bin/ld -
Luke
Luke Lonergan schrieb:
On 6/13/06 2:04 AM, "Sven Geisler" <[EMAIL PROTECTED]> wrote:
Please find attached a small patch with does apply a change to the
x86_64 part also to the i386 part of src/include/storage/s_lock.h.
Without this change the performance of PostgreSQL 8.0
Luke
Luke Lonergan schrieb:
Sven,
On 6/13/06 5:03 AM, "Sven Geisler" <[EMAIL PROTECTED]> wrote:
Yes, I know. We had a problem last year with the performance of the
Opteron. We have started the futex patch to resolve the issue. The futex
patch itself did have no effect, but
Luke,
Luke Lonergan schrieb:
On 6/13/06 5:46 AM, "Sven Geisler" <[EMAIL PROTECTED]> wrote:
You already get this change if you compile PostgreSQL 8.1.x in x86_64
(64-bit mode).
I see, so I think your point with the patch is to make the 32-bit compiled
version benefit as well.
Hi Hubert,
hubert depesz lubaczewski schrieb:
hi
i'm waiting for new server to arrive.
for the server i will get hp msa1000, with 14 discs (72g, 15000 rpm).
what kind of partitioning you suggest, to get maximum performance?
for system things i will have separate discs, so whole array is only for
Hi Hupert,
hubert depesz lubaczewski schrieb:
On 6/14/06, *Sven Geisler* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
You should configure your discs to RAID 10 volumes.
You should set up a separate volume for WAL.
A volume for an additional table space may
Hi Richard,
Richard Broersma Jr schrieb:
This depends on your application. Do you have a lot of disc reads?
Anyhow, I would put the xlog always to a RAID 10 volume because most of
the I/O for update and inserts is going to the xlog.
4 discs xlog
6 discs tables
4 discs tables2
I have a quest
Hi Nicky,
I guess, you should try to upgrade the memory setting of PostgreSQL first.
work_mem = 65536
Is a bit low for such large joins.
Did you get a change to watch the directory
/base//pgsql_tmp to see how large the temporary file is
during this query. I'm sure that there is large file.
Hi Nicky,
Did you tried to create an index to avoid the sequential scans?
Seq Scan on src_faktuur_verrsec t0...
I think, you should try
CREATE INDEX src.src_faktuur_verrsec_codesubstr ON
src.src_faktuur_verrsec (substr(src.src_faktuur_verrsec.code,1,2))
Cheers
Sven.
nicky schrieb:
Hello a
Hi Nick,
I'm not that good to advice how to get PostgreSQL to use an index to get
your results faster.
Did you try "not (substr(t0.code,1,2) in ('14','15','16','17'))"?
Cheers
Sven.
nicky schrieb:
Hello Sven,
We have the following indexes on src_faktuur_verrsec
/
CREATE INDEX src_faktu
Hi,
Tom Lane schrieb:
> Robert Lor <[EMAIL PROTECTED]> writes:
>> I ran pgbench and fired up a DTrace script using the lwlock probes we've
>> added, and it looks like BufMappingLock is the most contended lock, but
>> CheckpointStartLocks are held for longer duration!
>
> Those numbers look a b
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intended solely for the use of the individual or entity to whom they
are addressed. If you are not the intended recipient, you should not
copy it, re-transmit it, use it or disclose its contents, but should
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Hi Tom,
Just to explain our hardware situation releated to the FSB of the XEON's.
We have older XEON DP in operation with FSB 400 and 2.4 GHz.
The XEON MP box runs with 2.5 GHz.
The XEON MP box is a Fujitsu Siemens Primergy RX600 with ServerWorks GC LE
as chipset.
The box, which Dirk were use to
and have a 1-1 ratio between apache dynamic content
> connections and postgres backends. The alternative is to use connection
> pooling. Often a combination of the two is best.
>
--
Sven Geisler <[EMAIL PROTECTED]> Tel +49.30.921017.81 Fax .50
Senior Developer, AEC/communica
ave any ideas what my bottle neck might be and what I can
> do about it?
>
> Thanks for any help.
>
> Matthew.
>
> ---(end of broadcast)---
> TIP 6: explain analyze is your friend
--
Sven Geisler <[EMAIL PROTECTED]&g
; like I'll have to look deeper into the connection pooling.
>
> So you think the problem might be context switching on the server, I'll
> take a closer look at the this
>
> Thanks
>
> Matthew
>
> Sven Geisler wrote:
>> Hi Matthew,
>>
>> I
as what my bottle neck might be and what I can
> do about it?
>
> Thanks for any help.
>
> Matthew.
>
> ---(end of broadcast)---
> TIP 6: explain analyze is your friend
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Sven Geisler <[EMAIL PR
e already
> had to compile postgres to up the number of function parameters from 32
> to 64.
>
> Meanwhile I will try and persuade my colleagues to consider the upgrade
> option.
>
> Thanks
> Matthew
>
> Sven Geisler wrote:
>> Hi Matthew,
>>
>> I reme
apache/resin combination at the front end, we
> have thought about using resin threads to limit the number of
> connections but are worried about backing up connections in apache and
> getting some overflow here. But some kind of limiting of connections is
> probably required.
>
> Than
t from the spend money.
Regards
Sven.
Matthew Lunnon schrieb:
> Hi Sven,
>
> Does this mean that one option I have is to use a multi core Intel based
> server instead of an AMD based server?
>
> Matthew
>
> Sven Geisler wrote:
>> Hi Matthew,
>>
>> I remem
lient
> applications.
>
> How can we diagnose what is happening during the peaks?
>
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> TIP 1: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to [EMAIL PROTECTED] so
buy a SAN and the knowledge from a brand or a
specialist company.
BTW: You can do other things with SAN you can't do with local disks.
- mirroring to another location (room)
- mounting snapshots on another server
Sven.
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Sven Geisler <[EMAIL PROTECTED]> Tel +49.30.921017.81 Fax
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