Re: [ADMIN] Explain Analyze help

2004-03-11 Thread Peter Eisentraut
Mark Lubratt wrote: > Obivously, I have a lot of sequential scans going on, at about what > cost does it start to make sense to make an index? Or, should I just > put in a bunch of indexes and let the optimizer decide whether or not > to use them? Read the chapters on Indexes and Performance Tips

[ADMIN] started Data Warehousing

2004-03-11 Thread Pablo Marrero
Hello people! I have a question, I am going to begin a project for the University in the area of Data Warehousing and I want to use postgres. Do you have some recommendation to me? Thanks!! Greetings, Pablo ---(end of broadcast)--- TIP 1: sub

[ADMIN] Multiple postmasters for one data directory...

2004-03-11 Thread Stef
Hi all, I've got a situation on certain machines where approximately 70 postmasters are running. Each with one database, and one data directory. This is fine most of the time, except for a certain time of the month, when a very large consolidation process has to run on each database. At this tim

Re: [ADMIN] History Tables Vs History Field

2004-03-11 Thread Paul BREEN
> I have a table that will recieve about 2000 inserts per day, Although > it will technically never be dead data, about 99.999% of it will be > uninteresing after 30-40 days, My problem is that I dont know if I > should create a new table that is a history table or add a indexed field > and ignor

Re: [ADMIN] Multiple postmasters for one data directory...

2004-03-11 Thread Tom Lane
Stef <[EMAIL PROTECTED]> writes: > I've managed to make such a database cluster on a separate postmaster, > and re-linked all the database directories to point to the data directories > of all the other postmasters. > Although this workaround seems to be working rather well, I know for one > thing

[ADMIN] IMPORT or ETL tools

2004-03-11 Thread Louie Kwan
Hi All, Do anyone of you aware of any good PG import tool same as SQL*LOADER in ORACLE We are doing some DataWarehouse work and need to import a large set of data from csv files. We are trying a import tool from ems-hitech.com, but I have troubles when loading time and date columns. Any help is

Re: [ADMIN] IMPORT or ETL tools

2004-03-11 Thread Greg Spiegelberg
Louie Kwan wrote: We are trying a import tool from ems-hitech.com, but I have troubles when loading time and date columns. ... data.csv 31/01/2004,D1H01,845,IP,dfrQCQCRD1,Normal,142.130.35.1 31/01/2004,D1H01,849,IP,dfrQCIMCP1,Normal,142.130.130.33 31/01/2004,D1H01,853,IP,dfrQCSIBL1,Normal

Re: [ADMIN] Multiple postmasters for one data directory...

2004-03-11 Thread Stef
Tom Lane mentioned : => Get out your backup tapes, because what you have on disk now is just a => pile of inconsistent bits. I haven't actually done anything but SELECT's from the shared postmaster, and it was a test machine. Phew!! Glad I asked first... I think the way I'll do it, is by using in