Re: Taking lot time - Mailing list pgsql-general

On 11/25/2015 07:46 AM, Ramesh T wrote:

First, please take a look at this:

https://en.wikipedia.org/wiki/Posting_style

>
> Hi All,
>          9.3 version using pgadmin3
>
> Query like below,20 columns fetching
>   SELECT col1,col2,col3,...col.20

When this thread started you said you where selecting 20 rows.
Which is correct 20 rows or columns and if columns how many rows?

>                                     FROM detail i,
>                                      adjdetail ia,
>                                    WHERE i.trans_id = ia.detail_id AND
> (i.event = ANY (ARRAY[21, 22, 3, 5]))
> created indexes on  where clause declared columns.
>
> Taking a lot of time above ..?any help apprectiated !.

A lot of time being?

Where are you measuring this time?
Remember populating a GUI with lots of data can take time.

>
> I have total 4 gb ram,i changed below in postgres.conf
>
> shared_buffers--1024mb
> temp_bufffers=8mb
> work_mem=200mb
> maintanace_work_mem=500mb
> seq_page_cost = 1.0
> random_page_cost = 5.0
> effective_cache_size = 1024MB
>
>
>
> On Wed, Nov 18, 2015 at 11:12 PM, Adrian Klaver
> <adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>> wrote:
>
>     On 11/17/2015 04:18 AM, Ramesh T wrote:
>
>         the query is big it's selecting 20 rows from two table like i
>         mentioned
>         above exaplain analyze
>
>         what should i do..?any help
>
>
>     Please do not top post.
>
>     I must be missing a post, as I see no explanation of what the query
>     is doing.
>
>
>         On Wed, Nov 4, 2015 at 4:27 AM, Adrian Klaver
>         <adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
>         <mailto:adrian.klaver@aklaver.com
>         <mailto:adrian.klaver@aklaver.com>>> wrote:
>
>              On 11/03/2015 06:42 AM, Ramesh T wrote:
>
>                  I have a Query it taking a lot of time to fetch results
>                  so,explain query gave
>
>                  "Hash Join  (cost=55078.00..202405.95 rows=728275
>         width=418)"
>                  "  Hash Cond: (itd.tran_id = iad._adj__id)"
>                  "  ->  Seq Scan on inv_detail itd  (cost=0.00..40784.18
>         rows=731029
>                  width=95)"
>                  "        Filter: (event_type = ANY
>         ('{21,22,3,5}'::integer[]))"
>                  "  ->  Hash  (cost=20590.78..20590.78 rows=610978
>         width=331)"
>                  "        ->  Seq Scan on inv_adj  iad  (cost=0.00..20590.78
>                  rows=610978
>                  width=331)"
>
>                  Can you Please let me know wt happen in query..?wt
>         should i do..
>
>
>              And the query is?
>
>
>              --
>              Adrian Klaver
>         adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
>         <mailto:adrian.klaver@aklaver.com
>         <mailto:adrian.klaver@aklaver.com>>
>
>
>
>
>     --
>     Adrian Klaver
>     adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
>
>


--
Adrian Klaver
adrian.klaver@aklaver.com