Logging for Tridion windows services

Question

Version: SDL Web 8.5

I have enabled logging for below tridion windows services in lower environments, I would like to enable this in our prod environment.

• SDL Web Content Manager Service Host
• SDL Web Content Manager Search Indexer
• SDL Web Content Manager Batch Processor

Enabled logging in below config files

E:\SDLWeb\bin\TcmServiceHost.exe.config
E:\SDLWeb\bin\TcmSearchIndexer.exe.config
E:\SDLWeb\bin\TcmBatchProcessor.exe.config

Something like below

<loggingConfiguration name="Logging Application Block" defaultCategory="General" logWarningsWhenNoCategoriesMatch="false">
    <listeners>  
<add name="Tridion CM ServiceHost Log File" fileName="E:\SDLWeb\log\TcmServiceHost.log" formatter="Log Text Formatter" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FlatFileTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=349a39f202fa9b53" traceOutputOptions="None" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FlatFileTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=349a39f202fa9b53"/>

and in below node

<categorySources>
      <add switchValue="All" name="General"/>
      <add switchValue="All" name="Tridion.ContentManager.LogCategory">
        <listeners>
          <add name="Tridion CM ServiceHost Log File" />
        </listeners>
      </add>

Now my questions Are

1. Performance impacts in prod?
2. How to set the log level to ERROR only?
3. How to set the log file rolling?

Answer 1

1. Performance impact depends heaviliy on the configured log level (don’t set it to Verbose on a Production env.)
2. Change the switchValue attribute in the log config you mentioned
3. I’m not sure if that is supported (yet) for CM logging.