what's the performance impact causing from the large size of Apache's access.log?

If the log file access.log gets very large, what's the performance impact to Apache running?
From my understanding, Apache never reads the entire log file into memory but just makes use of the filehandle to write log information into file directly. If so, what's
problem here in case of filesize very large? Except for the file system issue, the only other latent impact to make is the larger the log file is, the harder to analyze it for administrator if needed.

Please correct me if i'm wrong. Thanks in advance

 

In my view . it will not take whole file and get it in chunks.

 

I suggest that you rotate every day for the log to ensure that you can throw easier in future and for performance reasons too.