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

[Jon Masamitsu]

Yasumasa ,

Sounds like this is a request for an enhancement of the
feature that Yumin has implemented.   Or rather maybe
just a way of turning it on?  Or is it something more basic
to the feature?

Jon

On 4/12/2011 5:55 PM, Yasumasa Suenaga wrote:
> Hi Yumin,
>
> I would like to rotate GC log triggered by the outside.
> I think that it can be implemented using AttachLister 
> (AttachOperationFunctionInfo [])
> and invoker tool.
>
> Could you examine it?
>
>
> Best regards,
>
> Yasumasa
>
> (2011/04/13 3:41), 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
>>
>>
>>