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Apica strongly recommends that tuning the default network connections for your MacOS X / macOS system to properly run local ZebraTester Load Tests properly.

macOS X / macOS

The OS-settings for the maximum number of network connections per process are restricted by default to a value of 256 on almost all macOS X versions.

This default value is too small to execute even small tests from MacOS X systems and it . It is also too small to monitor remotely executed cluster jobs executed on any other machines.

...

Step

Screenshot

Locate the Command File:

  • In Finder, open ZebraTester Folder and MacTuning subfolder.

  • Double-Click the DoMacTuning.command script

Review the default (non-tuned) settings

  • Enter "ulimit -n". Typically you will see: 256

  • Enter "launchctl limit" .

  • Typically, you will see:

    • maxproc 709 1064

    • maxfiles 256 unlimited

Execute the Command File:

A terminal window appears.

  1. Press Return to continue

  2. Enter the superuser password (sudo root password)

  3. The settings are displayed with the new values. On this particular system, which has already been tuned, the values remain the same. On systems that have never had ZT installed, these These values will be set to smaller OS X defaults on systems that have never had ZT installed.

  4. The tuning is complete.

    1. Reboot the system.

Verify the New Settings

  • After the restart, open a terminal window and enter "ulimit -n" and "launchctl limit"

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