Re: Read performance on Large Table

> Hello Admin,

Hi Kido,

Create indece in the fields that you use to compare the JOIN

> I am looking to build a database to log activities on my system
>
> Currently I have the following table:
>
> CREATE TABLE table
> (
> attr1 bigint,
> attr2 text,
> attr3 timestamp without time zone,
> attr4 integer,
> attr5 character varying(50),
> attr6 character varying(50),
> attr7 character varying(50),
> attr8 character varying(50),
> attr9 character varying(50),
> attr10 character varying(50)
> )
>
> Over 3 months the table has grown to 600+ Millions Rows,
>
> We mainly do inserts, we almost never do updates or delete.
>
> However the table is not very useful as it stands because any select we
> run it takes a very long time ( in hours) to complete.
>
>
> Question1: Is Slowness to be expected with such big table?
> Question2: is there anything I am not doing that I should do to get a
> better perfomance?
>
> I am thinking about 2 solution but I wanted to Ask the more experienced
> people before implementing them:
>
> 1: Break the table into multiple small table for each week.
> 2: Create an index on the Timestamp column sin it is the one we use the
> most in queries.
>
> Thank you in advance for you Help,
>
> --Kido K.
>
>
> Note:
> explain analyse select count(*) from table where attr5='value' and attr3
> >
> '05/19/2015 00:00:00' and attr3 < '05/21/2015 00:00:00';
>
> Has been running for 30 minutes and counting....

Saludos,
Gilberto Castillo
ETECSA, La Habana, Cuba