Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread Pavel Stehule 
2016-08-20 14:17 GMT+02:00 :

> On 2016-08-20 12:05, Pavel Stehule wrote:
>
>> 2016-08-20 13:59 GMT+02:00 :
>>
>> On 2016-08-20 11:42, Pavel Stehule wrote:
>>>
>>> 2016-08-20 13:31 GMT+02:00 :
>>>
>>> On 2016-08-20 08:58, Pavel Stehule wrote:
>>> 2016-08-20 10:27 GMT+02:00 :
>>>
>>> On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:
>>>
>>> Welcome to the pgsql-performance mailing list!
>>> Your password at PostgreSQL Mailing Lists is
>>>
>>> x8DiA6
>>>
>>> To leave this mailing list, send the following command in the
>>> body
>>> of a message to majord...@postgresql.org:
>>>
>>> approve x8DiA6 unsubscribe pgsql-performance
>>> debasis.mohar...@ipathsolutions.co.in
>>>
>>> This command will work even if your address changes. For that
>>> reason,
>>> among others, it is important that you keep a copy of this
>>> message.
>>>
>>> To post a message to the mailing list, send it to
>>> pgsql-performance@postgresql.org
>>>
>>> If you need help or have questions about the mailing list, please
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>>> You can manage your subscription by visiting the following WWW
>>> location:
>>>
>>>
>>> > .org/debasis.moharana%40ipathsolutions.co.in
>>
>>> [1]
>>>
>>> [2]
>>>
>>> [1]>
>>> Dear Sir/Mam,
>>>
>>> I have a PostgreSQL 9.5 instance running on Windows 8 machine with
>>> 4GB of RAM.This server is mainly used for inserting/updating large
>>> amounts of data via copy/insert/update commands, and seldom for
>>> running select queries.
>>>
>>> Here are the relevant configuration parameters I changed:
>>>
>>> max_connections = 100
>>> shared_buffers = 512MB
>>> effective_cache_size = 3GB
>>> work_mem = 12233kB
>>> maintenance_work_mem = 256MB
>>> min_wal_size = 1GB max_wal_size = 2GB
>>> checkpoint_completion_target = 0.7
>>> wal_buffers = 16MB
>>> default_statistics_target = 100
>>>
>>> After setting in postgresql.conf. I run the select query to fetch
>>> large amount of record of 29000 in postgresql but it takes 10.3
>>> seconds but the same query takes 2 seconds for execution in MSSQL.
>>>
>>> So my query is how to improve the perfermance in postgresql.
>>>
>>
>>   hi
>>
>>   please, send execution plan of slow query
>>
>>   https://www.postgresql.org/docs/current/static/sql-explain.html [3]
>> [3]
>>  [3]
>>   https://explain.depesz.com/ [4] [4] [4]
>>
>>   p.s. Did you do VACUUM and ANALYZE on database?
>>
>>   Regards
>>
>>   Pavel
>>
>> Regards,
>>> Debasis Moharana
>>> .NET Software Developer
>>>
>>> --
>>> Sent via pgsql-performance mailing list
>>> (pgsql-performance@postgresql.org)
>>> To make changes to your subscription:
>>> http://www.postgresql.org/mailpref/pgsql-performance [2] [1] [2]
>>>
>>
>>   Links:
>>   --
>>   [1]
>>
>>
>> https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.
>> org/debasis.moharana%40ipathsolutions.co.in
>> [1]
>>  [2]
>>   [2] http://www.postgresql.org/mailpref/pgsql-performance [2] [1]
>>   [3] https://www.postgresql.org/docs/current/static/sql-explain.html
>> [3]
>>  [3]
>>   [4] https://explain.depesz.com/ [4] [4]
>>
>>
>>   Hi,
>>
>>   Please check the execution plan details
>>
>>   Execution Query is = EXPLAIN (ANALYZE, BUFFERS) select * from
>>  tblPurchaseOrderstock cross join tblPurchaseOrderInfo;
>>
>>   "Nested Loop  (cost=0.00..507.51 rows=39593 width=224) (actual
>>  time=0.032..13.026 rows=39593 loops=1)"
>>   "  Buffers: shared read=8"
>>   "  I/O Timings: read=0.058"
>>   "  ->  Seq Scan on tblpurchaseorderstock  (cost=0.00..7.89 rows=289
>>  width=95) (actual time=0.014..0.082 rows=289 loops=1)"
>>   "Buffers: shared read=5"
>>   "I/O Timings: read=0.040"
>>   "  ->  Materialize  (cost=0.00..5.05 rows=137 width=129) (actual
>>  time=0.000..0.006 rows=137 loops=289)"
>>   "Buffers: shared read=3"
>>   "I/O Timings: read=0.019"
>>   "->  Seq Scan on tblpurchaseorderinfo  (cost=0.00..4.37
>>  rows=137 width=129) (actual time=0.011..0.035 rows=137 loops=1)"
>>   "  Buffers: shared read=3"
>>   "  I/O Timings: read=0.019"
>>   "Planning time: 56.052 ms"
>>   "Execution time: 14.038 ms"
>>
>>  It is same query? It needs only 14ms
>>
>>  Regards
>>
>>  Pavel
>>
>> Regards,
>>> Debasis Moharana
>>>
>>
>>  Links:
>>  --
>>  [1] http://www.postgresql.org/mailpref/pgsql-performance [2]
>>  [2]
>>
>> https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.
>> org/debasis.moharana%40ipathsolutions.co.in
>> [1]
>>  [3] https://www.postgresql.org/docs/current/static/sql-explain.html
>> [3]
>>  [4] https://explain.depesz.com/ [4]
>>
>>  Hi,
>>
>>  Yes you right.But it will take more time(10.3 sec.) Plase check the
>> snap.
>>
>> The real time you can see in EXPLAIN

Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread debasis . moharana 

On 2016-08-20 12:05, Pavel Stehule wrote:

2016-08-20 13:59 GMT+02:00 :


On 2016-08-20 11:42, Pavel Stehule wrote:

2016-08-20 13:31 GMT+02:00 :

On 2016-08-20 08:58, Pavel Stehule wrote:
2016-08-20 10:27 GMT+02:00 :

On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:

Welcome to the pgsql-performance mailing list!
Your password at PostgreSQL Mailing Lists is

x8DiA6

To leave this mailing list, send the following command in the
body
of a message to majord...@postgresql.org:

approve x8DiA6 unsubscribe pgsql-performance
debasis.mohar...@ipathsolutions.co.in

This command will work even if your address changes. For that
reason,
among others, it is important that you keep a copy of this
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To post a message to the mailing list, send it to
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Dear Sir/Mam,

I have a PostgreSQL 9.5 instance running on Windows 8 machine with
4GB of RAM.This server is mainly used for inserting/updating large
amounts of data via copy/insert/update commands, and seldom for
running select queries.

Here are the relevant configuration parameters I changed:

max_connections = 100
shared_buffers = 512MB
effective_cache_size = 3GB
work_mem = 12233kB
maintenance_work_mem = 256MB
min_wal_size = 1GB max_wal_size = 2GB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100

After setting in postgresql.conf. I run the select query to fetch
large amount of record of 29000 in postgresql but it takes 10.3
seconds but the same query takes 2 seconds for execution in MSSQL.

So my query is how to improve the perfermance in postgresql.


  hi

  please, send execution plan of slow query

  https://www.postgresql.org/docs/current/static/sql-explain.html [3]
[3]
 [3]
  https://explain.depesz.com/ [4] [4] [4]

  p.s. Did you do VACUUM and ANALYZE on database?

  Regards

  Pavel


Regards,
Debasis Moharana
.NET Software Developer

--
Sent via pgsql-performance mailing list
(pgsql-performance@postgresql.org)
To make changes to your subscription:
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  Links:
  --
  [1]


https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.org/debasis.moharana%40ipathsolutions.co.in
[1]
 [2]
  [2] http://www.postgresql.org/mailpref/pgsql-performance [2] [1]
  [3] https://www.postgresql.org/docs/current/static/sql-explain.html
[3]
 [3]
  [4] https://explain.depesz.com/ [4] [4]

  Hi,

  Please check the execution plan details

  Execution Query is = EXPLAIN (ANALYZE, BUFFERS) select * from
 tblPurchaseOrderstock cross join tblPurchaseOrderInfo;

  "Nested Loop  (cost=0.00..507.51 rows=39593 width=224) (actual
 time=0.032..13.026 rows=39593 loops=1)"
  "  Buffers: shared read=8"
  "  I/O Timings: read=0.058"
  "  ->  Seq Scan on tblpurchaseorderstock  (cost=0.00..7.89 rows=289
 width=95) (actual time=0.014..0.082 rows=289 loops=1)"
  "Buffers: shared read=5"
  "I/O Timings: read=0.040"
  "  ->  Materialize  (cost=0.00..5.05 rows=137 width=129) (actual
 time=0.000..0.006 rows=137 loops=289)"
  "Buffers: shared read=3"
  "I/O Timings: read=0.019"
  "->  Seq Scan on tblpurchaseorderinfo  (cost=0.00..4.37
 rows=137 width=129) (actual time=0.011..0.035 rows=137 loops=1)"
  "  Buffers: shared read=3"
  "  I/O Timings: read=0.019"
  "Planning time: 56.052 ms"
  "Execution time: 14.038 ms"

 It is same query? It needs only 14ms

 Regards

 Pavel


Regards,
Debasis Moharana


 Links:
 --
 [1] http://www.postgresql.org/mailpref/pgsql-performance [2]
 [2]

https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.org/debasis.moharana%40ipathsolutions.co.in
[1]
 [3] https://www.postgresql.org/docs/current/static/sql-explain.html
[3]
 [4] https://explain.depesz.com/ [4]

 Hi,

 Yes you right.But it will take more time(10.3 sec.) Plase check the
snap.

The real time you can see in EXPLAIN ANALYZE ... output. The some
strange time what you can see in PgAdmin can be based on

a) PgAdmin issue - pgAdmin is relativly slow client due slow
formatting - the time of processing in your application can be pretty
better, try to check another client

b) there can be some network issues - the problem is in passing data
from server to client

but probably variant is @a - pgAdmin is not good for benchmarking -
use "psql" console instead.

Pavel


Can you please tell me what we need to setup so that it will take
the actual time.

Regards,
Debasis Moharana




Links:
--
[1]

Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread Pavel Stehule 
2016-08-20 13:59 GMT+02:00 :

> On 2016-08-20 11:42, Pavel Stehule wrote:
>
>> 2016-08-20 13:31 GMT+02:00 :
>>
>> On 2016-08-20 08:58, Pavel Stehule wrote:
>>> 2016-08-20 10:27 GMT+02:00 :
>>>
>>> On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:
>>>
>>> Welcome to the pgsql-performance mailing list!
>>> Your password at PostgreSQL Mailing Lists is
>>>
>>> x8DiA6
>>>
>>> To leave this mailing list, send the following command in the
>>> body
>>> of a message to majord...@postgresql.org:
>>>
>>> approve x8DiA6 unsubscribe pgsql-performance
>>> debasis.mohar...@ipathsolutions.co.in
>>>
>>> This command will work even if your address changes. For that
>>> reason,
>>> among others, it is important that you keep a copy of this
>>> message.
>>>
>>> To post a message to the mailing list, send it to
>>> pgsql-performance@postgresql.org
>>>
>>> If you need help or have questions about the mailing list, please
>>> contact the people who manage the list by sending a message to
>>> pgsql-performance-ow...@postgresql.org
>>>
>>> You can manage your subscription by visiting the following WWW
>>> location:
>>>
>>
>> > .org/debasis.moharana%40ipathsolutions.co.in
>> [2]
>>
>> [1]>

>>> Dear Sir/Mam,
>>>
>>> I have a PostgreSQL 9.5 instance running on Windows 8 machine with
>>> 4GB of RAM.This server is mainly used for inserting/updating large
>>> amounts of data via copy/insert/update commands, and seldom for
>>> running select queries.
>>>
>>> Here are the relevant configuration parameters I changed:
>>>
>>> max_connections = 100
>>> shared_buffers = 512MB
>>> effective_cache_size = 3GB
>>> work_mem = 12233kB
>>> maintenance_work_mem = 256MB
>>> min_wal_size = 1GB max_wal_size = 2GB
>>> checkpoint_completion_target = 0.7
>>> wal_buffers = 16MB
>>> default_statistics_target = 100
>>>
>>> After setting in postgresql.conf. I run the select query to fetch
>>> large amount of record of 29000 in postgresql but it takes 10.3
>>> seconds but the same query takes 2 seconds for execution in MSSQL.
>>>
>>> So my query is how to improve the perfermance in postgresql.
>>>
>>
>>  hi
>>
>>  please, send execution plan of slow query
>>
>>  https://www.postgresql.org/docs/current/static/sql-explain.html [3]
>> [3]
>>  https://explain.depesz.com/ [4] [4]
>>
>>  p.s. Did you do VACUUM and ANALYZE on database?
>>
>>  Regards
>>
>>  Pavel
>>
>> Regards,
>>> Debasis Moharana
>>> .NET Software Developer
>>>
>>> --
>>> Sent via pgsql-performance mailing list
>>> (pgsql-performance@postgresql.org)
>>> To make changes to your subscription:
>>> http://www.postgresql.org/mailpref/pgsql-performance [1] [2]
>>>
>>
>>  Links:
>>  --
>>  [1]
>>
>> https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.
>> org/debasis.moharana%40ipathsolutions.co.in
>> [2]
>>  [2] http://www.postgresql.org/mailpref/pgsql-performance [1]
>>  [3] https://www.postgresql.org/docs/current/static/sql-explain.html
>> [3]
>>  [4] https://explain.depesz.com/ [4]
>>
>>
>>  Hi,
>>
>>  Please check the execution plan details
>>
>>  Execution Query is = EXPLAIN (ANALYZE, BUFFERS) select * from
>> tblPurchaseOrderstock cross join tblPurchaseOrderInfo;
>>
>>  "Nested Loop  (cost=0.00..507.51 rows=39593 width=224) (actual
>> time=0.032..13.026 rows=39593 loops=1)"
>>  "  Buffers: shared read=8"
>>  "  I/O Timings: read=0.058"
>>  "  ->  Seq Scan on tblpurchaseorderstock  (cost=0.00..7.89 rows=289
>> width=95) (actual time=0.014..0.082 rows=289 loops=1)"
>>  "Buffers: shared read=5"
>>  "I/O Timings: read=0.040"
>>  "  ->  Materialize  (cost=0.00..5.05 rows=137 width=129) (actual
>> time=0.000..0.006 rows=137 loops=289)"
>>  "Buffers: shared read=3"
>>  "I/O Timings: read=0.019"
>>  "->  Seq Scan on tblpurchaseorderinfo  (cost=0.00..4.37
>> rows=137 width=129) (actual time=0.011..0.035 rows=137 loops=1)"
>>  "  Buffers: shared read=3"
>>  "  I/O Timings: read=0.019"
>>  "Planning time: 56.052 ms"
>>  "Execution time: 14.038 ms"
>>
>> It is same query? It needs only 14ms
>>
>> Regards
>>
>> Pavel
>>
>> Regards,
>>> Debasis Moharana
>>>
>>
>>
>>
>> Links:
>> --
>> [1] http://www.postgresql.org/mailpref/pgsql-performance
>> [2]
>> https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.
>> org/debasis.moharana%40ipathsolutions.co.in
>> [3] https://www.postgresql.org/docs/current/static/sql-explain.html
>> [4] https://explain.depesz.com/
>>
>
>
>
> Hi,
>
> Yes you right.But it will take more time(10.3 sec.) Plase check the snap.
>

The real time you can see in EXPLAIN ANALYZE ... output. The some strange
time what you can see in PgAdmin can be based on

a) PgAdmin issue - pgAdmin is relativly slow client due slow formatting -
the time of processing in your application can be pretty better, try to
check another

Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread debasis . moharana 

On 2016-08-20 11:42, Pavel Stehule wrote:

2016-08-20 13:31 GMT+02:00 :


On 2016-08-20 08:58, Pavel Stehule wrote:
2016-08-20 10:27 GMT+02:00 :

On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:

Welcome to the pgsql-performance mailing list!
Your password at PostgreSQL Mailing Lists is

x8DiA6

To leave this mailing list, send the following command in the
body
of a message to majord...@postgresql.org:

approve x8DiA6 unsubscribe pgsql-performance
debasis.mohar...@ipathsolutions.co.in

This command will work even if your address changes. For that
reason,
among others, it is important that you keep a copy of this
message.

To post a message to the mailing list, send it to
pgsql-performance@postgresql.org

If you need help or have questions about the mailing list, please
contact the people who manage the list by sending a message to
pgsql-performance-ow...@postgresql.org

You can manage your subscription by visiting the following WWW
location:




Dear Sir/Mam,

I have a PostgreSQL 9.5 instance running on Windows 8 machine with
4GB of RAM.This server is mainly used for inserting/updating large
amounts of data via copy/insert/update commands, and seldom for
running select queries.

Here are the relevant configuration parameters I changed:

max_connections = 100
shared_buffers = 512MB
effective_cache_size = 3GB
work_mem = 12233kB
maintenance_work_mem = 256MB
min_wal_size = 1GB max_wal_size = 2GB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100

After setting in postgresql.conf. I run the select query to fetch
large amount of record of 29000 in postgresql but it takes 10.3
seconds but the same query takes 2 seconds for execution in MSSQL.

So my query is how to improve the perfermance in postgresql.


 hi

 please, send execution plan of slow query

 https://www.postgresql.org/docs/current/static/sql-explain.html [3]
[3]
 https://explain.depesz.com/ [4] [4]

 p.s. Did you do VACUUM and ANALYZE on database?

 Regards

 Pavel


Regards,
Debasis Moharana
.NET Software Developer

--
Sent via pgsql-performance mailing list
(pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance [1] [2]


 Links:
 --
 [1]

https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.org/debasis.moharana%40ipathsolutions.co.in
[2]
 [2] http://www.postgresql.org/mailpref/pgsql-performance [1]
 [3] https://www.postgresql.org/docs/current/static/sql-explain.html
[3]
 [4] https://explain.depesz.com/ [4]

 Hi,

 Please check the execution plan details

 Execution Query is = EXPLAIN (ANALYZE, BUFFERS) select * from
tblPurchaseOrderstock cross join tblPurchaseOrderInfo;

 "Nested Loop  (cost=0.00..507.51 rows=39593 width=224) (actual
time=0.032..13.026 rows=39593 loops=1)"
 "  Buffers: shared read=8"
 "  I/O Timings: read=0.058"
 "  ->  Seq Scan on tblpurchaseorderstock  (cost=0.00..7.89 rows=289
width=95) (actual time=0.014..0.082 rows=289 loops=1)"
 "Buffers: shared read=5"
 "I/O Timings: read=0.040"
 "  ->  Materialize  (cost=0.00..5.05 rows=137 width=129) (actual
time=0.000..0.006 rows=137 loops=289)"
 "Buffers: shared read=3"
 "I/O Timings: read=0.019"
 "->  Seq Scan on tblpurchaseorderinfo  (cost=0.00..4.37
rows=137 width=129) (actual time=0.011..0.035 rows=137 loops=1)"
 "  Buffers: shared read=3"
 "  I/O Timings: read=0.019"
 "Planning time: 56.052 ms"
 "Execution time: 14.038 ms"

It is same query? It needs only 14ms

Regards

Pavel


Regards,
Debasis Moharana




Links:
--
[1] http://www.postgresql.org/mailpref/pgsql-performance
[2]
https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.org/debasis.moharana%40ipathsolutions.co.in
[3] https://www.postgresql.org/docs/current/static/sql-explain.html
[4] https://explain.depesz.com/




Hi,

Yes you right.But it will take more time(10.3 sec.) Plase check the 
snap.



Can you please tell me what we need to setup so that it will take the 
actual time.


Regards,
Debasis Moharana
-- 
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread Pavel Stehule 
2016-08-20 13:31 GMT+02:00 :

> On 2016-08-20 08:58, Pavel Stehule wrote:
>
>> 2016-08-20 10:27 GMT+02:00 :
>>
>> On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:
>>>
>>> Welcome to the pgsql-performance mailing list!
 Your password at PostgreSQL Mailing Lists is

 x8DiA6

 To leave this mailing list, send the following command in the
 body
 of a message to majord...@postgresql.org:

 approve x8DiA6 unsubscribe pgsql-performance
 debasis.mohar...@ipathsolutions.co.in

 This command will work even if your address changes. For that
 reason,
 among others, it is important that you keep a copy of this
 message.

 To post a message to the mailing list, send it to
 pgsql-performance@postgresql.org

 If you need help or have questions about the mailing list, please
 contact the people who manage the list by sending a message to
 pgsql-performance-ow...@postgresql.org

 You can manage your subscription by visiting the following WWW
 location:



>>> > .org/debasis.moharana%40ipathsolutions.co.in
>>
>>> [1]>

>>> Dear Sir/Mam,
>>>
>>> I have a PostgreSQL 9.5 instance running on Windows 8 machine with
>>> 4GB of RAM.This server is mainly used for inserting/updating large
>>> amounts of data via copy/insert/update commands, and seldom for
>>> running select queries.
>>>
>>> Here are the relevant configuration parameters I changed:
>>>
>>> max_connections = 100
>>> shared_buffers = 512MB
>>> effective_cache_size = 3GB
>>> work_mem = 12233kB
>>> maintenance_work_mem = 256MB
>>> min_wal_size = 1GB max_wal_size = 2GB
>>> checkpoint_completion_target = 0.7
>>> wal_buffers = 16MB
>>> default_statistics_target = 100
>>>
>>> After setting in postgresql.conf. I run the select query to fetch
>>> large amount of record of 29000 in postgresql but it takes 10.3
>>> seconds but the same query takes 2 seconds for execution in MSSQL.
>>>
>>> So my query is how to improve the perfermance in postgresql.
>>>
>>
>> hi
>>
>> please, send execution plan of slow query
>>
>> https://www.postgresql.org/docs/current/static/sql-explain.html [3]
>> https://explain.depesz.com/ [4]
>>
>> p.s. Did you do VACUUM and ANALYZE on database?
>>
>> Regards
>>
>> Pavel
>>
>> Regards,
>>> Debasis Moharana
>>> .NET Software Developer
>>>
>>> --
>>> Sent via pgsql-performance mailing list
>>> (pgsql-performance@postgresql.org)
>>> To make changes to your subscription:
>>> http://www.postgresql.org/mailpref/pgsql-performance [2]
>>>
>>
>>
>>
>> Links:
>> --
>> [1]
>> https://lists.postgresql.org/mj/mj_wwwusr/domain=postgresql.
>> org/debasis.moharana%40ipathsolutions.co.in
>> [2] http://www.postgresql.org/mailpref/pgsql-performance
>> [3] https://www.postgresql.org/docs/current/static/sql-explain.html
>> [4] https://explain.depesz.com/
>>
>
>
>
> Hi,
>
> Please check the execution plan details
>
>
> Execution Query is = EXPLAIN (ANALYZE, BUFFERS) select * from
> tblPurchaseOrderstock cross join tblPurchaseOrderInfo;
>
> "Nested Loop  (cost=0.00..507.51 rows=39593 width=224) (actual
> time=0.032..13.026 rows=39593 loops=1)"
> "  Buffers: shared read=8"
> "  I/O Timings: read=0.058"
> "  ->  Seq Scan on tblpurchaseorderstock  (cost=0.00..7.89 rows=289
> width=95) (actual time=0.014..0.082 rows=289 loops=1)"
> "Buffers: shared read=5"
> "I/O Timings: read=0.040"
> "  ->  Materialize  (cost=0.00..5.05 rows=137 width=129) (actual
> time=0.000..0.006 rows=137 loops=289)"
> "Buffers: shared read=3"
> "I/O Timings: read=0.019"
> "->  Seq Scan on tblpurchaseorderinfo  (cost=0.00..4.37 rows=137
> width=129) (actual time=0.011..0.035 rows=137 loops=1)"
> "  Buffers: shared read=3"
> "  I/O Timings: read=0.019"
> "Planning time: 56.052 ms"
> "Execution time: 14.038 ms"
>

It is same query? It needs only 14ms

Regards

Pavel


>
> Regards,
> Debasis Moharana
>

Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread debasis . moharana 

On 2016-08-20 08:58, Pavel Stehule wrote:

2016-08-20 10:27 GMT+02:00 :


On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:


Welcome to the pgsql-performance mailing list!
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Dear Sir/Mam,

I have a PostgreSQL 9.5 instance running on Windows 8 machine with
4GB of RAM.This server is mainly used for inserting/updating large
amounts of data via copy/insert/update commands, and seldom for
running select queries.

Here are the relevant configuration parameters I changed:

max_connections = 100
shared_buffers = 512MB
effective_cache_size = 3GB
work_mem = 12233kB
maintenance_work_mem = 256MB
min_wal_size = 1GB max_wal_size = 2GB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100

After setting in postgresql.conf. I run the select query to fetch
large amount of record of 29000 in postgresql but it takes 10.3
seconds but the same query takes 2 seconds for execution in MSSQL.

So my query is how to improve the perfermance in postgresql.


hi

please, send execution plan of slow query

https://www.postgresql.org/docs/current/static/sql-explain.html [3]
https://explain.depesz.com/ [4]

p.s. Did you do VACUUM and ANALYZE on database?

Regards

Pavel


Regards,
Debasis Moharana
.NET Software Developer

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[2] http://www.postgresql.org/mailpref/pgsql-performance
[3] https://www.postgresql.org/docs/current/static/sql-explain.html
[4] https://explain.depesz.com/




Hi,

Please check the execution plan details


Execution Query is = EXPLAIN (ANALYZE, BUFFERS) select * from 
tblPurchaseOrderstock cross join tblPurchaseOrderInfo;


"Nested Loop  (cost=0.00..507.51 rows=39593 width=224) (actual 
time=0.032..13.026 rows=39593 loops=1)"

"  Buffers: shared read=8"
"  I/O Timings: read=0.058"
"  ->  Seq Scan on tblpurchaseorderstock  (cost=0.00..7.89 rows=289 
width=95) (actual time=0.014..0.082 rows=289 loops=1)"

"Buffers: shared read=5"
"I/O Timings: read=0.040"
"  ->  Materialize  (cost=0.00..5.05 rows=137 width=129) (actual 
time=0.000..0.006 rows=137 loops=289)"

"Buffers: shared read=3"
"I/O Timings: read=0.019"
"->  Seq Scan on tblpurchaseorderinfo  (cost=0.00..4.37 rows=137 
width=129) (actual time=0.011..0.035 rows=137 loops=1)"

"  Buffers: shared read=3"
"  I/O Timings: read=0.019"
"Planning time: 56.052 ms"
"Execution time: 14.038 ms"

Regards,
Debasis Moharana


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To make changes to your subscription:
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Re: [PERFORM] pgsql-performance issue

2016-08-20 Thread Pavel Stehule 
2016-08-20 10:27 GMT+02:00 :

> On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:
>
>> Welcome to the pgsql-performance mailing list!
>> Your password at PostgreSQL Mailing Lists is
>>
>> x8DiA6
>>
>> To leave this mailing list, send the following command in the body
>> of a message to majord...@postgresql.org:
>>
>> approve x8DiA6 unsubscribe pgsql-performance
>> debasis.mohar...@ipathsolutions.co.in
>>
>> This command will work even if your address changes.  For that reason,
>> among others, it is important that you keep a copy of this message.
>>
>> To post a message to the mailing list, send it to
>>   pgsql-performance@postgresql.org
>>
>> If you need help or have questions about the mailing list, please
>> contact the people who manage the list by sending a message to
>>   pgsql-performance-ow...@postgresql.org
>>
>> You can manage your subscription by visiting the following WWW location:
>>
>> > .org/debasis.moharana%40ipathsolutions.co.in>
>>
> Dear Sir/Mam,
>
> I have a PostgreSQL 9.5 instance running on Windows 8 machine with 4GB of
> RAM.This server is mainly used for inserting/updating large amounts of data
> via copy/insert/update commands, and seldom for running select queries.
>
> Here are the relevant configuration parameters I changed:
>
> max_connections = 100
> shared_buffers = 512MB
> effective_cache_size = 3GB
> work_mem = 12233kB
> maintenance_work_mem = 256MB
> min_wal_size = 1GB max_wal_size = 2GB
> checkpoint_completion_target = 0.7
> wal_buffers = 16MB
> default_statistics_target = 100
>
> After setting in postgresql.conf. I run the select query to fetch large
> amount of record of 29000 in postgresql but it takes 10.3 seconds but the
> same query takes 2 seconds for execution in MSSQL.
>
> So my query is how to improve the perfermance in postgresql.
>

hi

please, send execution plan of slow query

https://www.postgresql.org/docs/current/static/sql-explain.html
https://explain.depesz.com/

p.s. Did you do VACUUM and ANALYZE on database?

Regards

Pavel

>
> Regards,
> Debasis Moharana
> .NET Software Developer
>
>
> --
> Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-performance
>

[PERFORM] pgsql-performance issue

2016-08-20 Thread debasis . moharana 

Dear Sir/Mam,

I have a PostgreSQL 9.5 instance running on Windows 8 machine with 4GB 
of RAM.This server is mainly used for inserting/updating large amounts 
of data via copy/insert/update commands, and seldom for running select 
queries.


Here are the relevant configuration parameters I changed:

max_connections = 100
shared_buffers = 512MB
effective_cache_size = 3GB
work_mem = 12233kB
maintenance_work_mem = 256MB
min_wal_size = 1GB max_wal_size = 2GB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100

After setting in postgresql.conf. I run the select query to fetch large 
amount of record of 29000 in postgresql but it takes 10.3 seconds but 
the same query takes 2 seconds for execution in MSSQL.


So my query is how to improve the perfermance in postgresql.

Regards,
Debasis Moharana
.NET Software Developer


--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

[PERFORM] pgsql-performance issue

2016-08-20 Thread debasis . moharana 

On 2016-08-20 08:21, pgsql-performance-ow...@postgresql.org wrote:

Welcome to the pgsql-performance mailing list!
Your password at PostgreSQL Mailing Lists is

x8DiA6

To leave this mailing list, send the following command in the body
of a message to majord...@postgresql.org:

approve x8DiA6 unsubscribe pgsql-performance
debasis.mohar...@ipathsolutions.co.in

This command will work even if your address changes.  For that reason,
among others, it is important that you keep a copy of this message.

To post a message to the mailing list, send it to
  pgsql-performance@postgresql.org

If you need help or have questions about the mailing list, please
contact the people who manage the list by sending a message to
  pgsql-performance-ow...@postgresql.org

You can manage your subscription by visiting the following WWW 
location:




Dear Sir/Mam,

I have a PostgreSQL 9.5 instance running on Windows 8 machine with 4GB 
of RAM.This server is mainly used for inserting/updating large amounts 
of data via copy/insert/update commands, and seldom for running select 
queries.


Here are the relevant configuration parameters I changed:

max_connections = 100
shared_buffers = 512MB
effective_cache_size = 3GB
work_mem = 12233kB
maintenance_work_mem = 256MB
min_wal_size = 1GB max_wal_size = 2GB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100

After setting in postgresql.conf. I run the select query to fetch large 
amount of record of 29000 in postgresql but it takes 10.3 seconds but 
the same query takes 2 seconds for execution in MSSQL.


So my query is how to improve the perfermance in postgresql.

Regards,
Debasis Moharana
.NET Software Developer


--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance