[Spacewalk-list] Spacewalk slow opens full list of nodes (Systems) 250nodes

Matt Moldvan matt at moldvan.com
Tue Mar 29 03:53:34 UTC 2016 

At those values I'm not surprised you see some slowness... try Xmx/Xms of
4G and PermSize of 512m, MaxPermSize of 1024m.  The PermSize I think is
what helps the most, as the default is only 64MB if it's not specified
directly.  I'm not a Tomcat expert but it felt faster after I set the
values that way...

On Mon, Mar 28, 2016 at 10:31 PM Konstantin Raskoshnyi <konrasko at gmail.com>
wrote:

> I have this values for JAVA_OPTS
>
> tomcat   20101  0.3  0.7 4277092 513852 ?      Ssl  Mar25  16:36 java -ea
> -Xms256m -Xmx256m -Djava.awt.headless=true
> -Dorg.xml.sax.driver=org.apache.xerces.parsers.SAXParser
> -Dorg.apache.tomcat.util.http.Parameters.MAX_COUNT=1024 -XX:MaxNewSize=256
> Tried to increase Xms & Xmx, but didn't find any advantages
>
> On Fri, Mar 25, 2016 at 8:09 PM, Matt Moldvan <matt at moldvan.com> wrote:
>
>> You mentioned you did some Tomcat tuning, but what are your values set
>> to?  I noticed some considerable speed up when I tinkered with PermSize and
>> similar variables, like below.  I think the defaults are pretty low and not
>> enough memory is allocated off the bat.  Also while the page is loading
>> what do you notice in top or atop or htop?
>>
>> tomcat    2161     1  0 Mar24 ?        00:04:59
>> /usr/lib/jvm/java/bin/java -XX:NewRatio=4 -XX:PermSize=1024m
>> -XX:MaxPermSize=2048m -XX:NewSize=2048m -XX:MaxNewSize=2048m -Xms8g -Xmx8g
>> -XX:+UseParNewGC -XX:+UseConcMarkSweepGC
>> -Dsun.rmi.dgc.client.gcInterval=3600000
>> -Dsun.rmi.dgc.server.gcInterval=3600000...rest truncated
>>
>> On Fri, Mar 25, 2016 at 9:07 PM Konstantin Raskoshnyi <konrasko at gmail.com>
>> wrote:
>>
>>> Sorry, Asking again...Any possibilities to fix this bug, without
>>> upgrading the system?
>>> It's a physical host. Today it's almost not working (Systems menu), even
>>> if i list 25 hosts or search for a specific one. The top doesn't show any
>>> processes locking the system.
>>> Thanks!
>>>
>>> On Fri, Mar 25, 2016 at 10:41 AM, Matt Moldvan <matt at moldvan.com> wrote:
>>>
>>>> Yes I think the way the dependencies are set in the packages updating
>>>> one will potentially update the rest, so best to do the update off hours,
>>>> and if possible (if it's a VM for example) take a snapshot or back up of
>>>> your config and database first.
>>>>
>>>> On Fri, Mar 25, 2016 at 12:14 PM Konstantin Raskoshnyi <
>>>> konrasko at gmail.com> wrote:
>>>>
>>>>> Yep. I double checked the version, and it's 2.3.
>>>>> Is it necessary to update the whole packages with yum?
>>>>> It's the main deployment server. Don't want to get any troubles :).
>>>>> Thanks!
>>>>>
>>>>>
>>>>> On Friday, March 25, 2016, Matt Moldvan <matt at moldvan.com> wrote:
>>>>>
>>>>>> Cool, I was thinking you were already at 2.4 from your earlier
>>>>>> reply.  Either way good luck and let us know if it solves your issue in
>>>>>> case anyone has the same question in the future.
>>>>>>
>>>>>> > The spacewalk version is 2.4, Oct 7th, 2015 Thanks!
>>>>>>
>>>>>> On Thu, Mar 24, 2016 at 11:15 PM Konstantin Raskoshnyi <
>>>>>> konrasko at gmail.com> wrote:
>>>>>>
>>>>>>> Hi Matt!
>>>>>>>
>>>>>>> I tried to tune tomcat, but looks like here's my problem
>>>>>>> https://bugzilla.redhat.com/show_bug.cgi?id=1214437
>>>>>>>
>>>>>>> Going to upgrade to version 2.4..
>>>>>>>
>>>>>>> Thanks!
>>>>>>>
>>>>>>> On Thu, Mar 24, 2016 at 8:06 PM, Matt Moldvan <matt at moldvan.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> What are your tomcat settings like?  We have maxThreads set to 2048
>>>>>>>> for the 8009 and 8080 connectors in /etc/tomcat6/server.xml:
>>>>>>>>
>>>>>>>>     <Connector port="8080" protocol="HTTP/1.1"
>>>>>>>> connectionTimeout="20000" redirectPort="8443" maxThreads="2048"
>>>>>>>> maxKeepAliveRequests="1024" URIEncoding="UTF-8" address="127.0.0.1"/>
>>>>>>>>     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443"
>>>>>>>> URIEncoding="UTF-8" address="127.0.0.1" maxThreads="2048"
>>>>>>>> maxConnections="2048" connectionTimeout="600" keepAliveTimeout="600"/>
>>>>>>>>
>>>>>>>> Also, /etc/tomcat6/tomcat6.conf has some settings for JAVA_OPTS
>>>>>>>> that are interesting for tuning purposes:
>>>>>>>>
>>>>>>>> JAVA_OPTS="-XX:NewRatio=4 -XX:PermSize=1024m -XX:MaxPermSize=2048m
>>>>>>>> -XX:NewSize=2048m -XX:MaxNewSize=2048m -Xms8g -Xmx8g -XX:+UseParNewGC
>>>>>>>> -XX:+UseConcMarkSweepGC -Dsun.rmi.dgc.client.gcInterval=3600000
>>>>>>>> -Dsun.rmi.dgc.server.gcInterval=3600000"
>>>>>>>>
>>>>>>>> Listing 500 systems on our master took ~10.22 seconds on an 8
>>>>>>>> vCPU/32GB RAM VMware VM, with an external Postgres database VM that has 8
>>>>>>>> vCPU/16GB RAM, so yours could be much quicker with some additional tuning,
>>>>>>>> I would think.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Mar 24, 2016 at 10:01 PM Konstantin Raskoshnyi <
>>>>>>>> konrasko at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> The spacewalk version is 2.4, Oct 7th, 2015
>>>>>>>>>
>>>>>>>>> Thanks!
>>>>>>>>>
>>>>>>>>> On Thu, Mar 24, 2016 at 6:21 PM, William H. ten Bensel <
>>>>>>>>> WHTENBEN at up.com> wrote:
>>>>>>>>>
>>>>>>>>>> What version of spacewalk are you running?
>>>>>>>>>>
>>>>>>>>>> Bill
>>>>>>>>>>
>>>>>>>>>> On Mar 24, 2016, at 20:15, Konstantin Raskoshnyi <
>>>>>>>>>> konrasko at gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>> This email originated from outside of the company. Please use
>>>>>>>>>> discretion if opening attachments or clicking on links.
>>>>>>>>>> ------------------------------
>>>>>>>>>>
>>>>>>>>>> Hi Community!
>>>>>>>>>> We have a spacewalk server on SCLinux 7.1, Java 1.7 and postgres
>>>>>>>>>> When I open Systems menu (list servers) and list whole 250 nodes
>>>>>>>>>> - it takes about 90 seconds.
>>>>>>>>>> The java process shows 400%.
>>>>>>>>>> The server has 64Gb of Ram and 24 cores.
>>>>>>>>>> Thought the problem in postgres, actually i got the query from
>>>>>>>>>> the log file, the query runs about 8seconds.
>>>>>>>>>> All other time Java doing something...
>>>>>>>>>> Any solutions?
>>>>>>>>>>
>>>>>>>>>> Thanks!
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> **
>>>>>>>>>>
>>>>>>>>>>
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