Django database connections pool with psycopg2.pool

I'm trying to implement persistent database connection pool with django. One of the options is to use built in psycopg2.pool code which provide different types of pools (PersistentConnectionPool,...

psycopg2.pool crashes when the thread pool runs out

I have N Threads and M psycopg2.pool.ThreadedConnectionPools where N>M. I want to my threads to request for a psycopg2 connection and wait for it to respond, instead, they crash when there are...

psycopg2 close connection pool

I'm developing a Flask API, and I have the following code to have a connection pool using Psycopg2. I wonder should I consider to close the connection pool when the program terminates and how...

Using multiprocessing pool with psycopg2 ThreadedConnectionPool

While using ThreadedConnectionPool from psycopg2.pool, I'm trying to get multiple connections from the pool and use them with multiprocessing. I've created the following class to create a static...

Create a sqlalchemy engine using an existing psycopg2 connection pool

I'm adding a new ORM class using sqlalchemy's declarative mapping system. My codebase has an existing psycopg2 connection pool, which I want to reuse - I don't want code using my orm classes to...

psycopg2 pool SimpleConnectionPool needs commit?

I implemented this code to create a pool connection: def create_global_connection(minconn, maxconn, _pgconnstr): global g_connection g_connection =...

Python psycopg2 pool connection timeout

I have the following class that I am using to pool connections for my application. ``` import os import psycopg2 import contextlib from psycopg2 import pool from contextlib import...

connection pool exhausted psycopg2

I have an issue with Postgresql psycopg2. I receive the error : > error in executing with exception: connection pool exhausted My code : from psycopg2 import pool import pandas.io.sql as...

Connection Pool Getting Exhausted while using psycopg2

My application is throwing "Connection pool getting exhausted error" after running for couple of hours. I'm using psycopg2 multithreaded connection pool to connect my Dash application to...

Django (postgresql-psycopg2) connection pool: Simple vs Threaded vs Persistent ConnectionPool

I was looking at db connection pool implementations to use in my Django app using postgresql db backend, and came across this very recent wrapper package implemented for psycopg2...

Creating connection pool in psycopg2 using connection string

I created a connection object by passing a connection string to psycopg2.connect and it works fine. All the settings are saved in a dictionary and called this way: ```python import...

psycopg2 connection pooling in celery worker processes

How to create seperate psycopg2 connections in celery worker process or use a pool of connections inside workers without closing the connection? If I try to create a connection in...

How to establish 20 connections for concurrent connection tests in psycopg2

I want to do some concurrent connection tests and hope to establish 50 concurrent connections to the database by psycopg2 adaptor. What should I do? Should I use the psycopg2.pool to establish...

Resuse the connection pool created in psycopg2

The code is below import psycopg2 from psycopg2 import pool try: postgreSQL_pool = psycopg2.pool.SimpleConnectionPool(1, 20,user = "postgres", ...

How to use "INSERT" in psycopg2 connection pooling?

I use psycopg2 to connect to PostgreSQL on Python and I want to use connection pooling. I don't know what should I do instead commit() and rollback() when I execute INSERT query. db =...

How do I disable psycopg2 connection pooling?

I have configured pgpool-II for postgres connection pooling and I want to disable psycopg2 connection pooling. How do I do this? Thanks!

What is the benefit of using psycopg2 with SQLAlchemy

I understand that psycopg2 is more of a DB driver, and SQLAlchemy is an ORM. As the latest SQLAlchemy already supports postgreSQL dialect and connection pools, what are the benefits of using...

How to use connection pooling with psycopg2 (postgresql) with Flask

How should I use psycopg2 with Flask? I suspect it wouldn't be good to open a new connection every request so how can I open just one and make it globally available to the application? from flask...

Error Connecting To PostgreSQL can't pickle psycopg2.extensions.connection objects

I am trying to create an architecture that will have a main parent process & it can create new child processes. The main parent process will always be on loop to check if there is any child...

How to share connection pool with multiprocessing Python

I'm trying to share a psycopg2.pool.(Simple/Threaded)ConnectionPool among multiple python processes. What is the correct way to approach this? I am using Python 2.7 and Postgres 9. I would like...

multiprocessing is failing in psycopg2 2.8.3 version

I have updated the psycopg2 version to 2.8.3. After doing that multiprocessing connection pool is failing. Error traceback """ Traceback (most recent call last): File...

Python Database Pooling with psycopg2

Below is a database pooling example. I don't understand the following. Why the getcursor function use "yield"? What is the context manager? from psycopg2.pool import SimpleConnectionPool from...

Sharing a postgres connection pool between python multiproccess

I am trying to use psycopg2's connection pool with python's multiprocess library. Currently, attempting to share the connection pool amongst threads in the manner described above...

how to use initializer to set up my multiprocess pool?

I'm trying to use the multiprocess Pool object. I'd like each process to open a database connection when it starts, then use that connection to process the data that is passed in. (Rather than...

Saving psycopg2 connection within flask using SimpleConnectionPool

How do I save a psycopg2 connection on a flask server once I execute a query? I am trying to save connection from a different python file on flask. I am using this code:- from flask import...

Understanding DB Connection Pools in python

I'm not sure if I'm understanding the use case for DB connection pools (eg: psycopg2.pool and mysql.connector.pooling) in python. It seems to me that parallelism is usually achieved in python...

How to I pass my postgres connection pool to Dask workers with psycopg2 or asyncpg?

I want my Dask workers to grab a Postgres connection from a ThreadedConnectionPool, but when passing the pool like so ``` from psycopg2.pool import ThreadedConnectionPool def worker_pg(n, pool) ->...

Using decorators for database access with psycopg2

I am constructing a model that does large parts of its calculations in a Postgresql database (for performance reasons). It looks somewhat like this: def sql_func1(conn): # prepare some data,...

Utilizing multiple database pool connections within multiple gunicorn workers

I am using a flask server which initialises the app by creating 10 connections in psycopg2 Connection Pool (using Postgres). My flask server receives 40 requests every second. Every request uses...

In psycopg2, how do I use register_hstore with connection pools?

I use psycopg2 in many python projects, and frequently use HSTORE as a postgres data type. Typically I create my connections as follows: connection =psycopg2.connect(...)...