shersh

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

shersh

docker run -p 7000:7000 -p 7001:7001 -p 7002:7002 -e "IP=0.0.0.0" grokzen/redis-cluster:latest

shersh

import hudson.model.Computer.ListPossibleNames

def node = jenkins.model.Jenkins.instance.getNode( "slave-2" )
println node.computer.getChannel().call(new ListPossibleNames())

shersh

using UnityEngine;
using System.Collections;

//#pragma strict
//#pragma implicit
//#pragma downcast

// Require a character controller to be attached to the same game object
// I had to initally comment out the following RequireComponent
// line to make it compile and allow attaching to my Main Camera;

shersh

public class DbActor : ReceiveActor
    {
        public class Query
        {
            public Func<Db, IQueryable> Filter;
        }

        public DbActor()
        {
            Receive<Query>(query =>

shersh

using System;
using System.Diagnostics;
using Akka.Actor;
using Akka.Configuration;

namespace TestAkka
{
    public class HelloActor : ReceiveActor
    {
        public HelloActor()