Limit the size of alert log files with this parameter.
Parameter can be changed at system or session level.
i.e. - alter system or alter session
Options are UNLIMITED or a number with size attributes, i.e.: - K, M, G.
To make life easier set this parameter to UNLIMITED.
http://download.oracle.com/docs/cd/B28359_01/server.111/b28320/initparams129.htm
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22 hours ago