Re: Taking lot time

From: Melvin Davidson <melvin6925(at)gmail(dot)com>
To: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Cc: Ramesh T <rameshparnanditech(at)gmail(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Taking lot time
Date: 2015-11-25 21:02:23
Message-ID: CANu8Fiy0n6gm4Z0EfHfAvjE48PyaKKN+y+dO17skKb3foHdnMw@mail.gmail.com
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Adrian,

He never stated what the O/S is. I strongly suspect that he is using
PgAdmin to connect to a remote server, which adds another degree of
complication. So at the very least, we also need to know if the server is
local or remote and what the O/S is. Plus, as you have requested before,
exactly what time is "a long time"?

On Wed, Nov 25, 2015 at 3:50 PM, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

> On 11/25/2015 07:46 AM, Ramesh T wrote:
>
>>
>> Hi All,
>> 9.3 version using pgadmin3
>>
>> Query like below,20 columns fetching
>> SELECT col1,col2,col3,...col.20
>> 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 !.
>>
>
> Realized my previous post was not really helpful. What I should have said
> is below.
>
> To get a useful answer you will need to supply a complete(from one run of
> the query) set of information for the problem you are experiencing.
>
> So:
>
> 1) The complete definitions for the tables involved in the query,
> including FKs, triggers, etc.
>
> 2) The query you are running.
>
> 3) The EXPLAIN ANALYZE for said query
>
> 4) The number of rows returned from the query.
>
> 5) The procedure you used to getting the time value and where it was
> applied(psql, pgAdmin, etc).
>
>
>> 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(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)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(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>> <mailto:adrian(dot)klaver(at)aklaver(dot)com
>> <mailto:adrian(dot)klaver(at)aklaver(dot)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(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>> <mailto:adrian(dot)klaver(at)aklaver(dot)com
>> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>
>>
>>
>>
>>
>> --
>> Adrian Klaver
>> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>>
>>
>>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>
>
> --
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--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.

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