#Connection Pool

#Feature Introduction

pgBouncer provides connection pooling functionality, with key features including:

1. Connection Reuse: Reduces database connection overhead.
2. Load Balancing: Automatically distributes queries across different nodes.
3. Connection Limiting: Prevents a single client from consuming too many connections.
4. Query Caching: Improves performance for repeated queries.

#Configuration Parameters

Parameter	Default Value	Description
max_client_conn	100	Maximum number of client connections
default_pool_size	20	Default pool size
reserve_pool_size	5	Reserved pool size
pool_mode	session	Pooling mode
auth_type	md5	Authentication method

#Use Cases

1. High concurrency applications
2. Microservices architecture
3. Read-write splitting scenarios
4. Connection count limiting scenarios

#Precautions

1. Set the pool size reasonably.
2. Monitor the pool usage.
3. Optimize queries regularly.
4. Configure appropriate timeout settings.