What is HttpClient's default maximum connections

Question

Does HttpClient use the same ServicePoint Connection Limit as HttpWebRequest?

Thanks

See the comparison here: http://stackoverflow.com/questions/22214930/httpclient-vs-httpwebrequest — EugenSunic, Jul 30 '15 at 23:11

score 24 · Answer 1 · answered Jan 23 '19 at 13:59

24

The answer is not complete. It depends on implementation. In .net core ServicePointManager.DefaultConnectionLimit setting is not used, HttpClientHandler.MaxConnectionsPerServer should be used instead.

https://blogs.msdn.microsoft.com/timomta/2017/10/23/controlling-the-number-of-outgoing-connections-from-httpclient-net-core-or-full-framework/

answered Jan 23 '19 at 13:59

Ruslan Mukhamedov

448
3
10

When using DI, this is configured with: `services.AddHttpClient(clientName).ConfigurePrimaryHttpMessageHandler(sp => new HttpClientHandler() { MaxConnectionsPerServer = 2 });` Also note that `SocketsHttpHandler` is the newer implementation of `HttpMessageHandler` compared to `HttpClientHandler`, but you can still use `HttpClientHandler` as it seems to be more flexible and just forwards through to `SocketsHttpHandler` anyway. – Jez Aug 25 '23 at 15:43

score 5 · Accepted Answer · answered Jul 30 '15 at 23:15

5

It uses the same ServicePointManager so the answer is yes.

You can change the limit programmatically though if you want, see this

answered Jul 30 '15 at 23:15

Alexander Balabin

2,055
11
13

1

In .NET 6, ServicePointManager is flagged as Obsolete. – Joel Mueller Oct 07 '21 at 21:50

score 4 · Answer 3 · answered Jul 11 '22 at 16:29

Since I couldn't find an official answer anywhere in the docs, decompiling the code for .NET 6 yields a default value of int.MaxValue for HttpClientHandler.MaxConnectionsPerServer.

This should also be true for any version of .NET Core.

namespace System.Net.Http
{
    internal static partial class HttpHandlerDefaults
    {
        public const int DefaultMaxConnectionsPerServer = int.MaxValue;
        ...
    }
}

What is HttpClient's default maximum connections

3 Answers3

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