Hello,
Did you create an index? What is your shared buffers? Are you using Fsync, if so --- which one?
Ericson Smith wrote:
http://phpbuilder.com/columns/smith20010821.php3
On Thu, 2002-06-20 at 13:21, Peter Dimov wrote:
Hi ,
I need info about how to fine tune my postgresql.
I make a little test and the results was not good for posgresql.
I will to use the server in production and need this info.
So, the test:
first machine:
Linux Mandrake 8.2 and posgresql on it.
Dual Athlon MP 1,6 GHz , 1 GB RAM , IDE 7200 40 GB HDD.
I create a litle table (field1 varchar(100),field2 varchar(100), field3 int) and fill
200 000 x ('aaaaaaaaaaaaa1','bbbbbbbbbbbbbbb1',10);
200 000 x ('aaaaaaaaaaaaa2','bbbbbbbbbbbbbbb2',20);
200 000 x ('aaaaaaaaaaaaa3','bbbbbbbbbbbbbbb3',30);
200 000 x ('aaaaaaaaaaaaa4','bbbbbbbbbbbbbbb4',40);
200 000 x ('aaaaaaaaaaaaa5','bbbbbbbbbbbbbbb5',50);
After that i make : select distinct field1 from mytable.
As result I get 5 rows and it is OK, but the time is 3 min 30 sec.
The processor usage is 50% - it is OK , and the system use the maximum of the first processor.
The second machine:
Athlon XP 1,5 GHz , 512 MB RAM , 7200 HDD 40 GB
WinNT 4, Oracle 8i.
I make the same test.
The result come for 15 sec !!!!.
Ok, I am sure : the diferent can not be so big.
I do not make any special setup an postgres and on linux, anly the standart install.
Any info or example will be great.
Many thanks in advance.
---------------------------------
Do You Yahoo!?
Sign-up for Video Highlights of 2002 FIFA World Cup
---------------------------(end of broadcast)---------------------------
TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)
