We are using following JAVA_OPTS CONFIG in Jenkins deployment .
"name": "JAVA_OPTS",
"value": "-XX:+UseG1GC -XX:+ExplicitGCInvokesConcurrent
-XX:+ParallelRefProcEnabled -XX:+UseStringDeduplication
-XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20
-XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary
-XX:G1SummarizeRSetStatsPeriod=1 -Xms2048m -Xmx8192m" , and 48 GB ram
allocated for master Jenkins pod as per initial observation GC is working
correctly its not going beyond 8 gb . But observing RAM USAGE of master pod
is continusly increasing day by day . Some time it reaches to memory 48 GB
seems like it taking memory for cache .How can we control ram memory size ,
or is it possible to free cache memory from Jenkins Docker image which can
solve my problem .
On Mon, Jan 20, 2020, 3:45 PM Mahesh Wabale <[email protected]> wrote:
> Thanks Marc ,
>
> We will check if it helps , Currently we have "maximum durability"
> settings configured now , we are planning to make it to "
> performance-optimized" . We have observed couple of time disc IO is
> very high sometimes .
>
> On Monday, January 20, 2020 at 5:54:38 AM UTC+5:30, Mark Waite wrote:
>>
>> I'm not aware of an open bug in Jenkins related to being slow over NFS,
>> though Jenkins is quite disc intensive and runs best with local disc drives.
>>
>> You might refer to the following articles for more information:
>>
>> - Jenkins pipeline durability settings documentation
>>
>> <https://www.google.com/url?q=https%3A%2F%2Fjenkins.io%2Fdoc%2Fbook%2Fpipeline%2Fscaling-pipeline%2F%23will-higher-performance-durability-settings-help-me&sa=D&sntz=1&usg=AFQjCNEtvgPugqm3XG5_99K4YYJi6vCf6Q>
>> ("Will Higher-Performance Durability Settings Help Me? Yes, if your
>> Jenkins
>> instance uses NFS, magnetic storage, runs many Pipelines at once, or shows
>> high iowait.")
>> - CloudBees NFS guide
>> <https://support.cloudbees.com/hc/en-us/articles/217479948-NFS-Guide>
>> (multiple
>> pages of tuning recommendations)
>>
>>
>>
>> On Fri, Jan 17, 2020 at 5:42 AM Mahesh Wabale <[email protected]> wrote:
>>
>>> Hi Team ,
>>>
>>> We are using observing Jenkins slowness issues for jenkins version 2.138
>>> in multi branch pipeline project .
>>> We have also used NFS 4.1 .
>>>
>>> After Jenkins restart it works for few days but at some stage it stuck
>>> and becomes unresponsive . As per observation only restart will solve this
>>> issue for next few days . We require frequent restart due to this issue .
>>> Have anyone observed similar issues , or this is open bug in Jenkins ?
>>>
>>>
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>>> .
>>>
>>
>>
>> --
>> Thanks!
>> Mark Waite
>>
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