Re: [EXTERNAL] Re: Limits user connection in pgbouncer

On 15/12/21 1:56 μ.μ., Daulat wrote:
> Thanks  !
> max_connections =100 in postgresql.conf
>
> I am attaching my .ini file , help where I need to change .
>
> The Goal is to limit the number of connections from a specific app - when the db name is db1 and user is user1, only 55 connections are allowed (max_db_connections).
Unfortunately there is no database-specific tunable in pgbouncer to limit max client connections.
max_user_connections could be used but this would be a hard limit for any user.
>
> On Wed, Dec 15, 2021 at 2:58 PM Achilleas Mantzios <achill(at)matrix(dot)gatewaynet(dot)com <mailto:achill(at)matrix(dot)gatewaynet(dot)com>> wrote:
>
> On 14/12/21 6:25 μ.μ., Daulat wrote:
>> still i am able to login more than 2 connections after making changes under the database section .
>> [databases]
>>
>> db1 = host=localhost port=5432 dbname=db1 pool_mode = transaction pool_size=2 max_db_connections=2 user=user1
>>
>> Thanks
> The point with pgbouncer is to map N user connections to n DB connections where N >> n. So pgbouncer will allow up to max_client_conn in total, but every user (user1) will have max 2 real DB
> connections to this pgbouncer db (db1).
> Makes sense?
>>
>> On Tue, Dec 14, 2021 at 7:16 PM Michaeldba(at)sqlexec(dot)com <mailto:Michaeldba(at)sqlexec(dot)com> <Michaeldba(at)sqlexec(dot)com <mailto:Michaeldba(at)sqlexec(dot)com>> wrote:
>>
>> Do it under the databases section
>>
>> Sent from my iPad
>>
>>> On Dec 14, 2021, at 2:28 AM, Daulat <daulat(dot)dba(at)gmail(dot)com <mailto:daulat(dot)dba(at)gmail(dot)com>> wrote:
>>>
>>> 
>>> Hi Michael ,
>>>
>>> I have tried by setting the below entry under the users section but still I am able to make more than 2 connections. Please suggest what I am missing here ?
>>>
>>> [users]
>>> user1 = pool_mode=transaction max_user_connections=2
>>>
>>> Here are my other details:
>>>
>>> [databases]
>>> db1 = host=localhost dbname=db1
>>>
>>> logfile = /var/log/pgbouncer/pgbouncer.log
>>> pidfile = /var/run/pgbouncer/pgbouncer.pid
>>> listen_addr = *
>>> listen_port = 6432
>>> auth_type = md5
>>> auth_file = /etc/pgbouncer/userlist.txt
>>> admin_users = postgres
>>> pool_mode = session
>>> max_client_conn = 300
>>> max_db_connections = 2
>>> max_user_connections = 2
>>>
>>> On Mon, Dec 13, 2021 at 6:38 PM MichaelDBA <MichaelDBA(at)sqlexec(dot)com <mailto:MichaelDBA(at)sqlexec(dot)com>> wrote:
>>>
>>> Hi all,
>>>
>>> If you add the user to the database specification, then you can limit connections per user:
>>> db1 = host=localhost dbname=db1 pool_size=2 user=myuser
>>>
>>> Regards,
>>> Michael Vitale
>>>
>>>
>>> Godfrin, Philippe E wrote on 12/13/2021 7:57 AM:
>>>> On 13/12/21 10:05 π.μ., Daulat wrote:
>>>>> Hello Team,
>>>>> How can we limit the user to  make a specific number of connections to the database?
>>>> Just specify this in the db definition configuration :
>>>>
>>>> db1 = host=localhost dbname=db1 pool_size=2
>>>>
>>>> but it will apply to every user, so that every user's pool will have max 2 connections, not only user1.
>>>>
>>>> Alternatively you could set "ALTER ROLE .. CONNECTION LIMIT connlimit " for user1 individually.
>>>
>
>
> --
> Achilleas Mantzios
> DBA, Analyst, IT Lead
> IT DEPT
> Dynacom Tankers Mgmt
>

--
Achilleas Mantzios
DBA, Analyst, IT Lead
IT DEPT
Dynacom Tankers Mgmt