MO
This policy setting specifies the maximum sizes of the log files. An individual setting may be specified for each of the Application, Security, Setup, and System event log channels. The user interfaces (UIs) of both the Local Group Policy Editor and the Microsoft Management Console (MMC) Event Viewer snap-in allow you to enter values as large as 2 terabytes. If this setting is not configured, event logs have a default maximum size of 20 megabytes.