You configured Flask-SQLAlchemy with SQLALCHEMY_POOL_SIZE = 5 but your app throws errors when more than 5 requests access the DB. What is a likely cause?

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Flask - Performance Optimization

You configured Flask-SQLAlchemy with SQLALCHEMY_POOL_SIZE = 5 but your app throws errors when more than 5 requests access the DB. What is a likely cause?

AFlask-SQLAlchemy does not support connection pooling

BConnections are not released back to the pool properly

CThe database server limits connections to 3

DThe pool size config is ignored by Flask

Step-by-Step Solution

Solution:

Step 1: Analyze error cause with pool size 5
If errors occur beyond 5 requests, likely connections are exhausted.
Step 2: Identify connection release issue
Connections must be returned to the pool after use; if not, pool is exhausted causing errors.
Final Answer:
Connections are not released back to the pool properly -> Option B
Quick Check:
Connection leaks cause pool exhaustion [OK]

Quick Trick: Always close or release connections to avoid leaks [OK]

Common Mistakes:

MISTAKES

Assuming config is ignored
Blaming database limits without checking
Thinking Flask-SQLAlchemy lacks pooling

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More Flask Quizzes

You configured Flask-SQLAlchemy with SQLALCHEMY_POOL_SIZE = 5 but your app throws errors when more than 5 requests access the DB. What is a likely cause?

Step 1: Analyze error cause with pool size 5

Step 2: Identify connection release issue

Final Answer:

Quick Check:

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