Request for review: 6941923: RFE: Handling large log files produced by long running Java Applications

[yumin.qi at oracle.com]

  Based on first round review comments, new webrev:

http://cr.openjdk.java.net/~minqi/6941923/webrev.01

One more flag added, GCLogFile which can be used as -Xloggc:<filename>:
-XX:GCLogFile=<filename>

Deleted class gclogStream, modify existing class fileStream instead to 
have the functions of the former.

Thanks
Yumin

On 4/12/2011 11:41 AM, yumin.qi at oracle.com wrote:
>  http://cr.openjdk.java.net/~minqi/6941923/webrev.00/ 
> <http://cr.openjdk.java.net/%7Eminqi/6941923/webrev.00/>
>
> Summary:
>
> This is a RFE request for having a GC log rotation to prevent Java 
> application from over flooding disk with GC output running for long time.
> In the implementation, supply three JVM options
> 1) -XX:+UseGCLogFileRotation   must be used with -Xloggc:file
> 2) -XX:MaxGCLogFileNumbers=  set limit of rotation file numbers, 
> default to 1, maximum set to 1024.
> 3) -XX:GCLogFileSize=  can be configured by user how big the file size 
> should be. Default to 10M. Minimum set to 512K if given from option is 
> less than 512K.
>
> If MaxGCLogFileNumbers=1, rotating output in same file, i.e write from 
> beginning of the file when reach cap of the file; with 
> MaxGCLogFileNumbers > 1 rotating files sequentially after reach cap in 
> file, file.1, file.2, ..., file.<MaxGCLogFileNumbers-1> then back to 
> file, file.1, ...
> Check if rotation needed at safepoint ending.
>
> Tested with multiple GC choices.
>
> Thanks
> Yumin
>
>
>