Re: [PERFORM] Are there some additional postgres tuning to improve performance in multi tenant system

2013-12-28 Thread Mark Kirkwood

On 28/12/13 18:19, ankush upadhyay wrote:

Hello All,

I am using multi tenant system and doing performance testing of multi
tenant application. In case of single tenant it is working fine but once
I enable tenants, then some time database servers not responding. Any clue?



It is a bit tricky to tell without any relevant information (e.g schema 
description). But a likely culprit would be a missing index on the 
relevant 'tenant_id' type field in each table that you are using to 
distinguish the various tenant datasets.


Regards

Mark


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Re: [PERFORM] Are there some additional postgres tuning to improve performance in multi tenant system

2013-12-28 Thread ankush upadhyay
I am using multiple databases in my app for multi tenacy environment.

In my app user login with tenant id and connect to respective database.

The scenario is when 5 users connect to 5 databases and perform some
activity in that case site performance going down and some time database
server become unresponsive.

In each database we have same schema with different data regarding to users
of that tenant.
Any idea?


On Sat, Dec 28, 2013 at 3:24 PM, Mark Kirkwood 
mark.kirkw...@catalyst.net.nz wrote:

 On 28/12/13 18:19, ankush upadhyay wrote:

 Hello All,

 I am using multi tenant system and doing performance testing of multi
 tenant application. In case of single tenant it is working fine but once
 I enable tenants, then some time database servers not responding. Any
 clue?


 It is a bit tricky to tell without any relevant information (e.g schema
 description). But a likely culprit would be a missing index on the relevant
 'tenant_id' type field in each table that you are using to distinguish the
 various tenant datasets.

 Regards

 Mark




-- 
--
Regards
@Ankush Upadhyay@


Re: [PERFORM] Are there some additional postgres tuning to improve performance in multi tenant system

2013-12-28 Thread Andrew Dunstan


On 12/28/2013 12:19 AM, ankush upadhyay wrote:

Hello All,

I am using multi tenant system and doing performance testing of multi 
tenant application. In case of single tenant it is working fine but 
once I enable tenants, then some time database servers not responding. 
Any clue?







I usually use the term multi-tenancy to refer to different postgres 
instances running on the same machine, rather than different databases 
within a single instance of postgres. So lease describe your setup in 
more detail.


cheers

andrew


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Re: [PERFORM] Are there some additional postgres tuning to improve performance in multi tenant system

2013-12-28 Thread ankush upadhyay
On Sat, Dec 28, 2013 at 6:50 PM, Andrew Dunstan and...@dunslane.net wrote:


 On 12/28/2013 12:19 AM, ankush upadhyay wrote:

 Hello All,

 I am using multi tenant system and doing performance testing of multi
 tenant application. In case of single tenant it is working fine but once I
 enable tenants, then some time database servers not responding. Any clue?





 I usually use the term multi-tenancy to refer to different postgres
 instances running on the same machine, rather than different databases
 within a single instance of postgres. So lease describe your setup in more
 detail.

 cheers

 andrew



First of all Thanks Andrew for let me know email etiquette and extremely
sorry for confusion.

Here I meant to say that  different postgres instances running on the same
machine.

Actually I have one application machine and one database server machine
with multiple postgres instances running on it and accessing by application
server.

I hope this time I could explain it in more details.

-- 
--
Regards
@Ankush Upadhyay@


Re: [PERFORM] Are there some additional postgres tuning to improve performance in multi tenant system

2013-12-28 Thread Andrew Dunstan


On 12/28/2013 08:46 AM, ankush upadhyay wrote:
On Sat, Dec 28, 2013 at 6:50 PM, Andrew Dunstan and...@dunslane.net 
mailto:and...@dunslane.net wrote:



On 12/28/2013 12:19 AM, ankush upadhyay wrote:

Hello All,

I am using multi tenant system and doing performance testing
of multi tenant application. In case of single tenant it is
working fine but once I enable tenants, then some time
database servers not responding. Any clue?





I usually use the term multi-tenancy to refer to different
postgres instances running on the same machine, rather than
different databases within a single instance of postgres. So lease
describe your setup in more detail.

cheers

andrew



First of all Thanks Andrew for let me know email etiquette and 
extremely sorry for confusion.


Here I meant to say that  different postgres instances running on the 
same machine.


Actually I have one application machine and one database server 
machine with multiple postgres instances running on it and accessing 
by application server.


I hope this time I could explain it in more details.





Why are you doing that, as opposed to running multiple databases in a 
single instance? Running more than a handful of instances in a single 
machine is almost always a recipe for poor performance. The vast 
majority of users in my experience run a single postgres instance per 
machine, possibly with a large number of databases.


cheers

andrew


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[PERFORM] Are there some additional postgres tuning to improve performance in multi tenant system

2013-12-27 Thread ankush upadhyay
Hello All,

I am using multi tenant system and doing performance testing of multi
tenant application. In case of single tenant it is working fine but once I
enable tenants, then some time database servers not responding. Any clue?

-- 
--
Regards
@Ankush Upadhyay@