Hi Daniel,
Thank you for the reply.
The test was made at home, running the VM on my i7 laptop.
#Running the VM on the real hypervisor server and network:
service tomcat8 stop && service tomcat8 start && time curl
http://127.0.0.1:8080/geoserver/web
#returns
real 1m5.163s
user 0m0.000s
sys 0m0.024s
#And:
watch cat /proc/sys/kernel/random/entropy_avail
#returns between:
445 to 840
So 1m for tomcat/geoserver to restart... seems to me an eternity!
When you reported 13s, I became a bit jealous...
PS.
Sorry, I'm an old fashion guy from ZX Spectrum generation, used to count
bits, and Z80 timestates... ;-)
2017-01-31 12:22 GMT+00:00 Daniel Araujo Miranda <miranda....@dpf.gov.br>:
> Hi, Ricardo,
>
> Your geoserver already starts in a reasonable time. I was unsettled
> with my installation because it took six minutes. Since haveged did not
> change the time needed to run your test, it seems geoserver (actually
> tomcat8) is not limited by entropy on startup.
> To make sure you have enough entropy, run the following on the same
> machine but on a separate console:
>
> watch cat /proc/sys/kernel/random/entropy_avail
>
> Then run the startup test on the original console. The reported
> entropy is expected to be over 1000 bits and likely over 2000 bits. "man
> random" says the maximum is 4096. If it goes under 1000 you are "starved"
> for entropy and haveged is not working properly. My guess is that your
> number will be a healthy value over 2000 bits and you should try a
> different approach to improve your startup time, which by the way seems
> fine to me.
>
> Best,
> Daniel
>
>
> Em 31/01/2017 09:02, Ricardo Pinho escreveu:
>
>> Oi Daniel,
>> Very interesting! I use VM's a lot and always found geoserver very slow
>> to start. :(
>>
>> On my "Ubuntu 16.04 server minimal VM, clean install", running on vmware
>> player:
>> (needed previous: sudo apt install curl)
>>
>> sudo su
>> service tomcat8 stop && service tomcat8 start && time curl
>> http://127.0.0.1:8080/geoserver/web
>>
>> # returns
>> real 0m24.487s
>> user 0m0.000s
>> sys 0m0.004s
>>
>> Then I tried the havegen solution:
>>
>> sudo apt install haveged
>>
>> #verifydefaults
>> sudo vi /etc/default/haveged
>> #contains: checked
>> DAEMON_ARGS="-w 1024"
>>
>> #start havegd at boot
>> update-rc.d haveged defaults
>>
>> sudo reboot
>>
>> Run it again:
>> sudo su
>> service tomcat8 stop && service tomcat8 start && time curl
>> http://127.0.0.1:8080/geoserver/web <http://127.0.0.1:8080/geoserver/web>
>>
>> #Results
>> real 0m24.258s
>> user 0m0.000s
>> sys 0m0.004s
>>
>> The same! :(
>>
>> Am I doing this right?
>>
>> Thank's
>> Ricardo
>>
>
>
--
Ricardo Pinho
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