The autoFlush attribute specifies whether the buffered output should be flushed automatically when the buffer is filled, or whether an exception should be raised to indicate the buffer overflow.
A value of true (default) indicates automatic buffer flushing and a value of false throws an exception.
The following directive causes the servlet to throw an exception when the servlet's output buffer is full −
<%@ page autoFlush = "false" %>
This directive causes the servlet to flush the output buffer when full −
<%@ page autoFlush = "true" %>
Usually, the buffer and the autoFlush attributes are coded on a single page directive as follows −
<%@ page buffer = "16kb" autoflush = "true" %>