Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-07 Thread Scott Marlowe
On 8/6/07, Sven Clement <[EMAIL PROTECTED]> wrote: > Ok thanks everybody for the calrification, after all now I allready learned > something new... ;) > > My employer is currently thinking about migration to 8.2.x because of your > feedback, so I think that the problem could be resolved... ;) Note

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-06 Thread Sven Clement
Ok thanks everybody for the calrification, after all now I allready learned something new... ;) My employer is currently thinking about migration to 8.2.x because of your feedback, so I think that the problem could be resolved... ;) Thanks to everyone... Sven Clement 2007/8/6, Heikki Linnakanga

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-06 Thread Heikki Linnakangas
Sven Clement wrote: > Partially I found that one in the PostgreSQL Documentation for the > 7.x.xversions under the command REINDEX where they claim that you > should run a > reindex under certain circumstances and for my comprehension this says that > with some access pattern (as ours (major writes

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-06 Thread Ragnar
On mán, 2007-08-06 at 00:10 -0700, Sven Clement wrote: > > > 2007/8/5, Heikki Linnakangas <[EMAIL PROTECTED]>: > > I don't remember a bug like that. Where did you read that > from? > > -- > Heikki Linnakangas > EnterpriseDB http://ww

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-06 Thread Sven Clement
2007/8/5, Heikki Linnakangas <[EMAIL PROTECTED]>: > > > I don't remember a bug like that. Where did you read that from? > > -- > Heikki Linnakangas > EnterpriseDB http://www.enterprisedb.com > Partially I found that one in the PostgreSQL Documentation for the 7.x.xversions under the command

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-05 Thread Heikki Linnakangas
Sven Clement wrote: > OK so beginning on Monday I will test the config on a 8.2.x to verify the > performance issues, but I also found some disturbing info's on the net, that > the index may be corrupted because of the big difference between an index > entry which is deleted and the new value inser

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-04 Thread Sven Clement
Hi everybody, The bigint problem was probably a typo because I had to type the entire definitions, as the server is on a vpn and I don't had access with my machine where I wrote the mail, and the 7.4.2 was surely a typo... ;) I apology... OK so beginning on Monday I will test the config on a 8.2.

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Tom Lane
Andrew Kroeger <[EMAIL PROTECTED]> writes: > With the table definitions you posted, one of the first things I noticed > was that the default value for an integer column was a bigint value. I > did some quick 32-bit math and found that the smallest legal 32-bit > integer value is -2147483648, not -

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Andrew Kroeger
Sven Clement wrote: > Table: "public.tmdata" ... > id| integer | default -2147483684::bigint ... > Table: "public.tmdataintervalsec" ... > id| integer | default -2147483684::bigint Not that this directly addresses the performance issues you described, but

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Josh Berkus
Sven, > The hardware is a IBM X306m Server, 3.2 GHz HT (Pentium IV), 1 GB RAM > and 2x 250 GB HDD (SATA-II) with ext3 fs, one of the HDD is dedicated to > database. OS is Debian 3.1 Sarge with PostgreSQL 7.4.7 (7.4.7-6sarge1) > with the libpq frontend library. Note that 7.4.7 is not the current b

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Sven Clement
Hi, First thank you already for your answers, as we are working in an environment with NDA's I have first to check all the queries before I may publish them here, but the structure of the DB is publishable: 2 Tables: Table: "public.tmdata" Column|Type |Modifiers --

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Dan Langille
On 3 Aug 2007 at 6:52, Sven Clement wrote: > Hello everybody, > > as I'm new to this list I hope that it is the right place to post this > and also the right format, so if I'm committing an error, I apologize > in advance. > > First the background of my request: > > I'm currently employed by an

Re: [PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Mark Lewis
On Fri, 2007-08-03 at 06:52 -0700, Sven Clement wrote: > Hello everybody, > > as I'm new to this list I hope that it is the right place to post this > and also the right format, so if I'm committing an error, I apologize > in advance. > > First the background of my request: > > I'm currently em

[PERFORM] Performance problems with large telemetric datasets on 7.4.2

2007-08-03 Thread Sven Clement
Hello everybody, as I'm new to this list I hope that it is the right place to post this and also the right format, so if I'm committing an error, I apologize in advance. First the background of my request: I'm currently employed by an enterprise which has approx. 250 systems distributed worldwid