SoftReferences not cleaned up

[yu.zhang at oracle.com]

Hi,

 From the gc logs the SoftReferences are not that many.

Thanks

Jenny


On 07/11/2017 01:37 AM, Nicolae Mihalache wrote:
> Here is a new output with PrintReferenceGC on:
> https://drive.google.com/open?id=0B8_hkIRtZSShWTVpeVFONGlqVjQ
>
> I see that each time when I run jmap -histo:live a few hundreds of 
> them are collected but still the number reported by jmap keeps 
> increasing (5665 last time it was run).
>
> On Mon, Jul 10, 2017 at 6:30 PM, yu.zhang at oracle.com 
> <mailto:yu.zhang at oracle.com> <yu.zhang at oracle.com 
> <mailto:yu.zhang at oracle.com>> wrote:
>
>     Can you add PrintReferenceGC to print out number of references for
>     each gc?
>
>     Thanks
>
>     Jenny
>
>
>     On 07/10/2017 05:52 AM, Nicolae Mihalache wrote:
>>     I didn't have verbose gc enabled but I did enable it, and  here
>>     is the log in the last 3 days:
>>     https://drive.google.com/drive/u/0/folders/0B8_hkIRtZSShdkdUTGhRMjNPVVk
>>     <https://drive.google.com/drive/u/0/folders/0B8_hkIRtZSShdkdUTGhRMjNPVVk>
>>
>>
>>     The "Full GC" is related to a jmap -histo:live I was running.
>>
>>     On Fri, Jul 7, 2017 at 11:16 PM, Bernd Eckenfels
>>     <ecki at zusammenkunft.net <mailto:ecki at zusammenkunft.net>> wrote:
>>
>>         Can you upload the verbose GC log somewhere? I suspect you
>>         don't see old/mixed GCs since 30h.
>>
>>         Gruss
>>         Bernd
>>         -- 
>>         http://bernd.eckenfels.net
>>         ------------------------------------------------------------------------
>>         *From:* hotspot-gc-use
>>         <hotspot-gc-use-bounces at openjdk.java.net
>>         <mailto:hotspot-gc-use-bounces at openjdk.java.net>> on behalf
>>         of Nicolae Mihalache <xpromache at gmail.com
>>         <mailto:xpromache at gmail.com>>
>>         *Sent:* Friday, July 7, 2017 1:58:11 PM
>>         *To:* hotspot-gc-use at openjdk.java.net
>>         <mailto:hotspot-gc-use at openjdk.java.net>
>>         *Subject:* SoftReferences not cleaned up
>>         Hello,
>>
>>         I have problems understanding why the SoftReferences are not
>>         cleaned up.  This is my version of java:
>>         java -version
>>         java version "1.8.0_92"
>>         Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
>>         Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)
>>
>>         and I run it with the options
>>         -Xmx512m  -XX:SoftRefLRUPolicyMSPerMB=1
>>
>>         Still the number of SoftReferences keep increasing and I see
>>         that some of them are 30+ hours old. I have a heap dump:
>>         https://drive.google.com/open?id=0B8_hkIRtZSShNUtTZUx3UTFuMEk
>>         <https://drive.google.com/open?id=0B8_hkIRtZSShNUtTZUx3UTFuMEk>
>>
>>         I don't know how to debug further, any hint would be appreciated.
>>
>>         thanks,
>>         nicolae
>>
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>>
>>
>>
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>

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