CodeSnips

ruby

class ShardedCounter
  SHARDS = 16
  SNAPSHOT_TTL = 10 # seconds

  def initialize(name, redis: REDIS)
    @name = name

Lock-Free Read Pattern for Hot Counters (Approximate)

rails redis performance

by codesnips 3 tabs

yaml

production:
  primary:
    adapter: postgresql
    url: <%= ENV['DATABASE_URL'] %>
    pool: <%= ENV.fetch("RAILS_MAX_THREADS", 5) %>
  primary_replica:

Database read replicas for scaling reads

rails postgresql scaling

by Alex Kumar 3 tabs

python

import random


class ReadWriteRouter:
    """Route reads to replicas, writes to primary."""

Django database read-write split with routers

django python database

by Priya Sharma 3 tabs

yaml

production:
  primary:
    adapter: postgresql
    database: app_production
    username: app
    password: <%= ENV["PRIMARY_DB_PASSWORD"] %>

Read Replica Routing for GET-Heavy Endpoints

rails activerecord postgres

by codesnips 4 tabs

python

import random


class PrimaryReplicaRouter:
    """Route reads to replicas, writes to primary."""

Django database routers for multiple databases

django python database

by Priya Sharma 1 tab