As per documentation:
The flush property specifies whether each log message is flushed immediately to the log file (which may hurt application performance, but ensures that everything is in the log in case of a system crash), Valid values are:
true: Every essages is immediately flushed to the log file (default).
false: Messages are not immediately flushed to the log file.
I am confused with false value as not immediately is very confusing, because not immediately could mean never as well as sometime.
Can anyone please confirm that if that meant never or sometime (if latter, can you please clarify when?)
When flush property is false, flushing is left to the default underlying platform behavior.
For details on what the exact behavior is for your OS when flush is false, refer to the documentation for CreateFile and FlushFileBuffers (never called explicitly by Poco when flush property is false) on Windows and std::ostream (never flushed explicitly by Poco when flush property is false) on other operating systems.