Re: database tuning

kelvan wrote:
> hi i need to know all the database overhead sizes and block header sizes etc
> etc as I have a very complex database to build and it needs to be speed
> tuned beyond reckoning

[snip]

> I am using postgres 8.1 if anyone can post links to pages containing over
> head information and index block header information it would be most
> appreciated as I cannot seem to find anything

I'd look to the source if you care that strongly. Don't rely on any info
found on the internet unless it explicitly mentions 8.1 - these things
change. Have a look in "backend/storage/" and "backend/access/" I'd
guess (not a hacker myself).

Some thoughts though:
1. If you care that strongly about performance, start building it with 8.3

2. Does your testing show that index storage overheads are/will be a
problem? If not, I'd concentrate on the testing to make sure you've
identified the bottlenecks first.

--
Richard Huxton
Archonet Ltd