Web servers record some of their transactions in a logfile.

For Logfile analysis you have to store and archive your own data, which often grows very large quickly.

The first phase, Analysis, computes all the necessary information from the logfile.

For Logfile analysis you need to maintain the software, including updates and security patches.

A common use is to post the logfile to a forum where more experienced users can help decipher which entries need to be removed.

Most major web logfile formats are supported, as well as split/compressed files.

The output is often captured in a permanent system logfile via a logging daemon, such as syslog.

To add hourly and average CPU usage to a logfile:

Therefore, no two systems load exactly the same modules but the structure of the output the modules give in the logfile is mostly the same.

When XFree86 starts, it creates a logfile which contains information about what happened when XFree86 started.

NMEA logfile (for development)

Usually the resulting logfile is stored on so-called "stable storage", that is a storage medium that is assumed to survive crashes and hardware failures.

We run through the logfile (from the beginning or the last checkpoint) and add all transactions for which we encounter Begin Transaction entries to the TT.

From that point it is possible to restore the DPT and the TT as they were at the time of the crash by reading the logfile forward again.

HijackThis can generate a plain-text logfile detailing all entries it finds, and some entries can be fixed by HijackThis.

On left side is a beacon, next a request for log is issued and AAUSAT-II reply with a transmission of the logfile.

Low-level technical events such as messages passing from one application to another over a middleware system, or transactions detected within a database logfile, are processed by a CEP engine.

To avoid rescanning the whole logfile during the analysis phase it is advisable to save the DPT and the TT regularly to the logfile, forming a checkpoint.

The XFree86 logfile is a text file, written by the XFree86 program, and designed to be useful for people who are trying to diagnose problems they are having with getting XFree86 to work.

Most major web logfile formats are supported (Web : CLF/ECLF/NECLF on Unix, IIS/W3C on Microsoft ; Mail : Postfix/Sendmail/Exim), as well as split/compressed files.