perf: add POSTGRES_MAX_CONNECTIONS env.

[shaohuzhang1]

build: remove pyc compilation.
Merge branch 'main' of https://github.com/maxkb-dev/maxkb
Merge branch 'main' of https://github.com/maxkb-dev/maxkb
perf: increase MAX_OVERFLOW of database connection pool.
Merge branch 'main' of https://github.com/maxkb-dev/maxkb
perf: add POSTGRES_MAX_CONNECTIONS env.

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[shaohuzhang1]

The code looks mostly correct for retrieving database settings from configuration data. However, there's a few points that could be improved:

Improvements

1. Use Configurables: Instead of using get('DB_MAX_OVERFLOW') directly, consider defining a configurable variable if you plan to change it frequently. This can make the code more maintainable.

2. Type Annotations: Add type annotations where applicable to improve readability and help with static analysis tools like mypy.

3. Ensure Values are Positive Integers: Validate that POOL_SIZE and MAX_OVERFLOW are positive integers before proceeding.

Here's an adjusted version of the function:

from typing import Any, Dict

def get_db_setting(self) -> Dict[str, Any]:
    """
    Retrieve database settings from the configuration.
    
    Returns:
        A dictionary containing database connection settings.
    """
    return {
        "ENGINE": self.get('DB_ENGINE'),
        "POOL_OPTIONS": {
            "POOL_SIZE": int(self.get('DB_POOL_SIZE', 5)),  # Default size is 5
            "MAX_OVERFLOW": int(self.get('DB_MAX_OVERFLOW', 20))  # Default overflow is 20
        }
    }

# Example usage:
# db_settings = get_db_setting()

Optimization Suggestions

• Early Return for Non-Configurable Values: If certain values (like POOL_SIZE) have default configurations, early returning these can reduce unnecessary processing.

This revised code includes simple types and adds some basic validation to ensure the necessary keys exist and have valid numeric values.