Setting LOGGING_SYNC consideration

Dear Experts,

I want to enable successful synchronous message logging. In that case, I want to set LOGGING_SYNC parameter. But, "Setting LOGGING_SYNC is not recommended to reduce processing overhead".

Is there any items to check or to put into consideration before setting LOGGING_SYNC? What is really the danger of setting LOGGING_SYNC?

Thank you,

Suwandi C.