I am using only one machine for one at a time & facing below mentioned error multiple times in a single day
original: error: remaining connection slots are reserved for non-replication superuser connections
at Parser.parseErrorMessage (C:\Users\ravi\Hezky_2.0\hezky_uat_node_2.0\node_modules\pg-protocol\dist\parser.js:287:98)
at Parser.handlePacket (C:\Users\ravi\Hezky_2.0\hezky_uat_node_2.0\node_modules\pg-protocol\dist\parser.js:126:29)
at Parser.parse (C:\Users\ravi\Hezky_2.0\hezky_uat_node_2.0\node_modules\pg-protocol\dist\parser.js:39:38)
readable:390:5)
at TLSWrap.onStreamRead (node:internal/stream_base_commons:190:23) {
length: 140,
severity: 'FATAL',
code: '53300',
detail: undefined,
hint: undefined,
position: undefined,
at TLSWrap.onStreamRead (node:internal/stream_base_commons:190:23) {
length: 140,
severity: 'FATAL',
code: '53300',
detail: undefined,
hint: undefined,
position: undefined,
internalPosition: undefined,
internalQuery: undefined,
where: undefined,
schema: undefined,
table: undefined,
column: undefined,
dataType: undefined,
constraint: undefined,
file: 'postinit.c',
line: '813',
routine: 'InitPostgres'
}
}
can someone please help to know what exactly I need to do? my plan: 1 GB RAM / 1vCPU / 10 GB Disk / Primary only / NYC3 - PostgreSQL 16
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Heya,
The error message you are seeing,
remaining connection slots are reserved for non-replication superuser connections
, indicates that your PostgreSQL server has reached the maximum number of allowed connections and has reserved the remaining slots for superuser connections. This can prevent regular users from establishing new connections to the database.The error message you are seeing,
remaining connection slots are reserved for non-replication superuser connections
, indicates that your PostgreSQL server has reached the maximum number of allowed connections and has reserved the remaining slots for superuser connections. This can prevent regular users from establishing new connections to the database.Steps to Resolve the Issue
1. Check and Increase the Max Connections Setting
You can increase the
max_connections
setting in your PostgreSQL configuration to allow more connections. Here’s how:Edit the PostgreSQL Configuration File:
Locate and edit the
postgresql.conf
file. This file is typically found in the PostgreSQL data directory (e.g.,/etc/postgresql/[version]/main/postgresql.conf
on Ubuntu or/var/lib/pgsql/[version]/data/postgresql.conf
on CentOS).Increase the
max_connections
Parameter:Find the line that sets
max_connections
and increase its value. For example, to increase the maximum connections to 200:Restart PostgreSQL:
After making changes to the configuration file, restart the PostgreSQL service to apply the changes.
Hi there,
As far as I can tell based on the output that you’ve shared, the error suggests that your PostgreSQL database has reached its maximum number of allowed connections.
The message “remaining connection slots are reserved for non-replication superuser connections” indicates that all available connection slots are in use, and the system is reserving the last few for superuser connections.
The potential causes for this could be:
What you could do here in order resolve the error is:
a. Check current connections:
This will show you how many active connections you currently have.
c. Implement connection pooling:
d. Optimize your code:
e. Consider upgrading your plan: Your current plan (1 GB RAM / 1vCPU) might be limiting the number of connections. Upgrading could allow for more simultaneous connections.
On the connection pooling implementation, here is a quick example:
After implementing these changes, monitor your application’s performance and database connection usage.
Let me know how it goes!
- Bobby