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Performance recommendations

The performance of the Authentication Server may vary and depends on several factors.

Most important factors:

Number or authentication requests per defined interval (average, but also peaks)

Number of total user count

Integration mode (Active Directory Integration or Standalone)

Authentication method used

Number of Authentication Servers used

External databases used in case of Standalone integration mode

HW and SW (OS) used in the whole ecosystem

It is impossible to define some single number representing the performance, but we tried to narrow the range of possible answers based on our tests.

Testing environment

Reference HW used for the Authentication Server (AS):

CPU: 2,5 GHz, 8 Cores,


Hard disk: SSD

Further details:

One Authentication Server used

External database on separate HW (similar to HW used for AS) when testing Standalone deployment type with an external database

When testing Active Directory Integration mode, Domain Controller (DC) was on separate HW (similar to HW used for AS)

Reporting Engine was not used during these tests

When comparing speed, the Active Directory Integration mode was the slowest in our tests, though it also depends on DC performance and some other parameters.

Standalone mode with a built-in database was as fast as if using an external database; however, a built-in database does not allow multiple Authentication Servers.

Standalone mode with external database is the most suitable for very large user bases.

Considering the performance described above, we have to consider what number of clients authenticate in what time interval.

For example, if all clients authenticate within one minute, then the Standalone mode with external database in our environment is ready to manage ~4800 clients.

Deployment type

Requests per second

Active Directory Integration mode


Standalone mode with built-in database


Standalone mode with an external database


However, if they authenticate evenly within one hour, it can theoretically manage more than 100.000.

The table below is based on the assumption that 10% of all clients authenticate in one minute and consider other deployment constraints.

If there is no in the table below, you may expect some performance issues unless you tune-up your environment.

User range

AD Integration mode

Standalone mode with built-in database

Standalone mode with an external database


HDD Storage

up to 5000

450 MB

800 MB

5000 - 20000


1 GB

2 GB






*Assuming multiple Authentication Servers are used