Thanks, AFAIK we didn't tried much performance testing with federationProviders enabled. It's on todo list though. Also we plan some refactoring of userStorage + userFederation, so we will likely go into it later.

For your case, the performance bottleneck can be in your federationProvider implementation, so I am not sure if it's the issue in Keycloak or rather issue in your implementation.

One thing to note (maybe it's not an issue in your case, but just adding it to be sure you're aware): UserFederationProvider.close is currently not called. So if you are rely on this method to free any important resources related to your implementation, you shouldn't as it doesn't work right now. We are working on improving this for next version.

Marek

On 13/06/16 07:57, Thomas Connolly wrote:
Hi Marek

I'm working with Fabricio on the federation performance issues with Keycloak.

In answer to your question we are using the latest KC 1.9.7 version (we upgraded this week from 1.9.2).

To give you some indication of the running a gatling direct access login test (results below).

As you can see below in (1) using KC out of the box. Great performance - we saw 110 tx per sec on a 4 core system.
In scenario (2) using a stubbed federator (simply an echo plugin not connecting to any back end services), performance is unacceptable.

1) Not using the federator - Stub federator (disabled) - while 29 tx per second we could easily get to a stable 110 tx per second.
    300 Users (hitting single server)
    ---- Global Information --------------------------------------------------------
    > request count                                       9185 (OK=9185   KO=0     )
    > min response time                                     18 (OK=18     KO=-     )
    > max response time                                    723 (OK=723    KO=-     )
    > mean response time                                    27 (OK=27     KO=-     )
    > std deviation                                         44 (OK=44     KO=-     )
    > response time 50th percentile                         20 (OK=20     KO=-     )
    > response time 75th percentile                         21 (OK=21     KO=-     )
    > mean requests/sec                                 29.626 (OK=29.626 KO=-     )
    ---- Response Time Distribution ------------------------------------------------
    > t < 800 ms                                          9185 (100%)
    > 800 ms < t < 1200 ms                                   0 (  0%)
    > t > 1200 ms                                            0 (  0%)
    > failed                                                 0 (  0%)

2) Stub federator (enabled)- if we brought test down to 12 tx per second (about 90 users) the response times dropped to < 1200 ms response times, however not even close to meeting out acceptance creteria.
    300 Users (hitting single server)
    ---- Global Information --------------------------------------------------------
    > request count                                       8496 (OK=8496   KO=0     )
    > min response time                                    511 (OK=511    KO=-     )
    > max response time                                  11191 (OK=11191  KO=-     )
    > mean response time                                  6832 (OK=6832   KO=-     )
    > std deviation                                       2329 (OK=2329   KO=-     )
    > response time 50th percentile                       7194 (OK=7194   KO=-     )
    > response time 75th percentile                       8690 (OK=8690   KO=-     )
    > mean requests/sec                                 27.404 (OK=27.404 KO=-     )
    ---- Response Time Distribution ------------------------------------------------
    > t < 800 ms                                           154 (  2%)
    > 800 ms < t < 1200 ms                                  85 (  1%)
    > t > 1200 ms                                         8257 ( 97%)
    > failed                                                 0 (  0%)

This is currently a show stopper for us and is blocking our path to production.
Do you run similar tests and how can we help you optimise the performance?

Regards
Tom.


Date: Wed, 8 Jun 2016 12:28:19 +0200
From: Marek Posolda <mposolda@redhat.com>
Subject: Re: [keycloak-user] Performance issues with Federation
    provider enabled
To: Fabricio Milone <fabricio.milone@shinetech.com>,    keycloak-user
    <keycloak-user@lists.jboss.org>
Message-ID: <5757F343.1040803@redhat.com>
Content-Type: text/plain; charset="windows-1252"

Hi,

what's the keycloak version used? Could you try latest keycloak and
check if performance is still the issue?

Marek

On 08/06/16 01:30, Fabricio Milone wrote:
> Hi all,
>
> I sent this email yesterday with 5 or more attachments, so I think it
> was blocked or something... here I go again :)
>
> I've been running load tests on our application during the last few
> weeks, and having some performance issues when my custom federator is
> enabled.
>
> The performance issue does not exist when the federator is disabled.
> *Configuration*:
>
> I have a cluster of 2 instances of Keycloak, with a standalone DB,
> we've verified the DB isn't an issue when the federator is disabled.
> Both instances have a quad core CPU and they are in the same network.
> We?ve left the memory at 512MB. The test script, database and API that
> connects to the federator are in separate machines.
> *Federator*:
>
> We have a simple custom federator that makes calls to a very
> performant api, which has been tested and is ok. Additionally, we've
> tested stubbing the API so the performance is not a problem there.
> This federator is using a jaxb marshaller to create a request, again
> tested in isolation and is performing well.
>
> As the federator is doing a lot of calls to the API (3 per login
> request), I've implemented a httpclient that uses a
> PoolingHttpClientConnectionManager with 1000 connections available to
> use, instead of using the standard apache httpclient from http
> components. That hasn't improved a bit the performance of the system.
> *Tests*:
> It is a gatling scala script that could generate around ~300 (or more)
> requests/second to the direct grants login endpoint using random
> usernames from a list (all of them already registered using KC). The
> script is doing a round robin across both instances of Keycloak with
> an even distribution to each KC instance.
> The idea is simulate a load of 300 to 1500 concurrent users trying to
> login into our systems.
> *Problem*:
>
> If I run the tests without using a federation I can see a very good
> performance, but when I try to run the tests with the custom
> federation code, the performance drops from ~150 requests/second to 22
> req/sec using both instances.
> Memory wise, it seems to be ok. I've never seen an error related to
> memory with this configuration, also if you take a look at the
> attached visualVM screenshot you'll see that memory is not a problem
> or it seems not to be.
> CPU utilisation is very low to my mind, I'd expect more than 80% of
> usage or something like that.
> There is a method that is leading the CPU samples on VisualVM called
> Semaphore.tryAcquire(). Not quite sure what's that for, still
> investigating.
>
> I can see that a lot of new threads are being created when the test
> starts, as it creates around 60requests/second to the direct grants
> login call, but it seems to be a bottleneck at some point.
>
> So I'm wondering if there is some configuration I'm missing on
> Keycloak side that could be affecting the cluster performance when a
> federator is enabled. Maybe something related to jpa connections,
> infinispan configuration or even wildfly.
>
> I'd really appreciate your help on this one as I'm out of ideas.
>
> I've attached some screenshots of visualVM and tests results from my
> last run today.
>
>
> Sorry for the long email and please let me know if you need further
> information.
>
> Thank you in advance,
>
> Regards,
> Fab
>
> --
> *Fabricio Milone*
> Developer


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