Reference library

Database scaling & optimization

Indexing, connection pooling, read replicas, query tuning, and throughput-aware SQL.

5 matches

Database Helper in Python with SQLite Scaling Optimization

Build a beginner-friendly SQLite database helper class with WAL, indexed queries, and efficient batch inserts for scaling.

sqlite database scalability

Python

import sqlite3
from contextlib import contextmanager


class DatabaseHelper:
    """Beginner-friendly helper for SQLite database operations with scaling tips."""

    def __init__(self, db_path):
        self.db_path = db_path

    @contextmanager
    def connection(self):
        """Context manager for automatic comm…

14 0 Open

Database scaling & optimization easy

How to Batch Load JSON Data in Python for Database Optimization

This code parses JSON data into records and loads them in batches to simulate efficient database insertion, reducing load and improving performance.

json batching database

Python

import json
import time

def parse_and_load(data, batch_size=100):
    """
    Parse JSON data and batch-load into a list of dicts.
    Demonstrates batching for database efficiency.
    """
    records = json.loads(data)
    batches = []

    for i in range(0, len(records), batch_size):
        batch = records[i:i + …

12 0 Open

Database scaling & optimization easy

How to Create a Database Helper Class for Beginners in Python

Build a beginner-friendly SQLite helper class with indexing and batch inserts to optimize database queries in Python.

sqlite database indexing

Python

import sqlite3


class DatabaseHelper:
    def __init__(self, db_path):
        self.connection = sqlite3.connect(db_path)
        self.cursor = self.connection.cursor()

    def create_table_with_index(self, table_name, columns, indexed_column):
        columns_sql = ", ".join(f"{name} {dtype}" for name, dtype in col…

13 0 Open

Database scaling & optimization medium

How to Mock SQLite executemany When Batch Inserting in Python

Batch insert many rows into SQLite with executemany and mock the cursor for isolated tests.

sqlite3 executemany mock

Python

import sqlite3
from unittest.mock import Mock, patch

def insert_users(conn, users):
    """Insert multiple user records using executemany."""
    cursor = conn.cursor()
    cursor.executemany(
        "INSERT INTO users (name, age) VALUES (?, ?)",
        users
    )
    conn.commit()
    return cursor.rowcount

if _…

15 0 Open

Database scaling & optimization medium

How to mock batch commit of transactions in Python

Simulate a transaction batch writer with commit, rollback, and summary logic to test database write patterns without a real database.

transactions mock batch

Python

import json
from datetime import datetime, timezone

class TransactionBatch:
    def __init__(self):
        self.pending = []
        self.committed = []
        self._log = []

    def add(self, operation):
        self.pending.append(operation)

    def commit(self):
        if not self.pending:
            return …

16 0 Open

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