Upgrading from sdk 2.7.x to 3.0.x or 3.1.x degrades performance significantly

.NET SDK
1

Not sure what I’m doing wrong, but the performance of the .net SDK has reduced significantly… Using .net SDK 2.7.x was incredibly faster… I simplified the test to just this…

using System;
using System.Diagnostics;
using System.Threading.Tasks;

namespace CouchbaseTest
{
class Program
{
static async Task Main(string args)
{
var stopWatch = Stopwatch.StartNew();
var cluster = await Couchbase.Cluster.ConnectAsync(“ip address”, “user”, “pwd”).ConfigureAwait(false);
var bucket = await cluster.BucketAsync(“bucketname”).ConfigureAwait(false);
var ping = bucket.PingAsync().ConfigureAwait(false);
stopWatch.Stop();
Console.WriteLine($"{stopWatch.ElapsedMilliseconds} ms");
}
}
}

The code works (with proper ip address, username and password) and returns in about 36 seconds (testing against remote server) with 3.x sdk. With 2.7 sdk it returns in about 3 seconds… using the following code:

using System;
using System.Collections.Generic;
using System.Diagnostics;
using Couchbase;
using Couchbase.Configuration.Client;

namespace CouchbaseTest
{
class Program
{
static void Main(string args)
{
var clientConfig = new ClientConfiguration
{
Servers = new List { new Uri(“http://ip address:8091”) }
};

        var stopWatch = Stopwatch.StartNew();
        var cluster = new Cluster(clientConfig);
        cluster.Authenticate("user", "pswd");
        var bucket = cluster.OpenBucket("bucket name");
        bucket.Ping();
        stopWatch.Stop();
        Console.WriteLine($"{stopWatch.ElapsedMilliseconds} ms");
    }
}

}

I’m using the same IP address, user name, password, and bucket name (obscured here for obvious reasons).

2

Hello @mmyers thanks for reaching out.

I tried against a cluster running on AWS (granted my side of internet is slow) still everytime I ran the code it got me back in about 5 seconds or less

Can you tell us more about the environment

Which Couchbase Server Version are you testing against ? I was running 6.6 CE
Which particular .net SDK 3.x version are you using ? I was using 3.1.7
What is your OS ? Mine is Mac OS

3

@mmyers -

Additionally, I suspect something is timing out causing the delay - enabling logging will help isolate the issue.

Jeff

4

Server: Community Edition 6.0.0 build 1693
Tried .net sdk versions: 3.0.5, 3.0.7, 3.1.7
Client is running on: Windows 10 Enterprise build 19043.1052
Server is running on: Linux 4.14.104+ in Google container

5

Thank you so much for the tip about logging… It showed:

info: Couchbase.DnsClientDnsResolver[0]
There was an error attempting to resolve hosts using DNS-SRV - Non-Existent Domain

This causes the extra 30 seconds of wait time. For any others that experience this, I resolved by setting:

EnableDnsSrvResolution = false

in the options.

1 Like