On 2011-10-12, Sigourney_Weaver wrote: > Hi I am using this configuration that is supposed to create one log file for > business (INFO & ERROR) and another - for system errors (FATAL).
> http://old.nabble.com/file/p32638170/Fk2dH.png > Both log files are created right away when I execute: > LogManager.GetLogger(typeof(Program)); > I dont want SystemErrorsLog log file to be created, unless I actually log > FATAL error, log.Fatal("System Error". Otherwise it would be just redundant > empty log file. Is there any way this can be done, maybe some attribute I am > not familiar with? In general FileAppender opens the file immediately once it gets configured. In fact it is not FileAppender itself but the LockingModel it uses. At least with log4net 1.2.11 the MinimalLock locking model will not open the file until the first message is logged. It opens and closes the file for each message. While this might avoid the empty log file it also implies a performance hit which may be quite significant if you have many FATAL errors. This may be acceptable if FATAL errors almost never happen - which I'd hope to be the case. Stefan
