Ahmad,
how fast is repeated runs ? First time system could be very slow.
Also, have you checked my page
http://www.sai.msu.su/~megera/oddmuse/index.cgi/Tsearch_V2_Notes
and some info about tsearch2 internals
http://www.sai.msu.su/~megera/oddmuse/index.cgi/Tsearch_V2_internals
Oleg
On Thu, 22 Sep 2005, Ahmad Fajar wrote:
I have about 419804 rows in my article table. I have installed tsearch2 and
its gist index correctly.
My table structure is:
CREATE TABLE tbarticles
(
articleid int4 NOT NULL,
title varchar(250),
mediaid int4,
datee date,
content text,
contentvar text,
mmcol float4 NOT NULL,
sirkulasi float4,
page varchar(10),
tglisidata date,
namapc varchar(12),
usere varchar(12),
file_pdf varchar(255),
file_pdf2 varchar(50),
kolom int4,
size_jpeg int4,
journalist varchar(120),
ratebw float4,
ratefc float4,
fti tsvector,
CONSTRAINT pk_tbarticles PRIMARY KEY (articleid)
) WITHOUT OIDS;
Create index fti_idx1 on tbarticles using gist (fti);
Create index fti_idx2 on tbarticles using gist (datee, fti);
But when I search something like:
Select articleid, title, datee from tbarticles where fti @@
to_tsquery('susilo&bambang&yudhoyono&jusuf&kalla');
It takes about 30 sec. I run explain analyze and the index is used
correctly.
Then I try multi column index to filter by date, and my query something
like:
Select articleid, title, datee from tbarticles where fti @@
to_tsquery('susilo&bambang&yudhoyono&jusuf&kalla') and datee >= '2002-01-01'
and datee <= current_date
An it still run about 25 sec. I do run explain analyze and my multicolumn
index is used correctly.
This is not acceptable if want to publish my website if the search took very
longer.
I have run vacuum full analyze before doing such query. What going wrong
with my query?? Is there any way to make this faster?
I have try to tune my postgres configuration, but it seem helpless. My linux
box is Redhat 4 AS, and
the hardware: 2 GB RAM DDR 400, 2x200 GB Serial ATA 7200RPM and configure as
RAID0 (just for postgres data), my sistem run at EIDE 80GB 7200 RPM.
Please.help.help.
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83
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