Richard,
So basically your system can handle 18.5 pages/CPU/second. I can only
wish we could get that kind of throughput. We can only get 2
page/CPU/second or so.
If you can get that kind of performance, I wonder what is wrong with our
environment. I think I need a good night sleep and recharge my batteries
to think again in the morning.
Good Night.
- Ravi
Richard Yee wrote:
Our servers are made by Sun and have 4 AMD Opteron processessors with 16GB
RAM. We are running in a cluster of 3 servers.
-Richard
On Mon, Jan 11, 2010 at 12:54 PM, Ravi Kapoor <[email protected]>wrote:
Thanks Richard for the numbers. Can you also mention no of servers used,
CPU
and memory details of each server?
Regards
Ravi
On Mon, Jan 11, 2010 at 3:00 PM, Richard Yee <[email protected]
wrote:
Ravi,
We have load tested our Trinidad application with up to 800,000 page
loads/hr. and the application handled it fine. We have also simulated up
to
190 concurrent users. We are using MyFaces 1.1.5 and Trinidad 1.0.5. We
are
using the Oracle Application Server 10GR3 and are running on Linux.
-Richard
On Fri, Jan 8, 2010 at 3:12 PM, Ravi Kapoor <[email protected]>
wrote:
I have 2 GB on the machine and it only uses 1 GB.
Can you give details on your environment. Especially trinidad version,
CPU
details and how many users per JVM can you handle, what %age of CPU is
consumed by trinidad etc
Regards
Ravi
On Fri, Jan 8, 2010 at 4:08 PM, Richard Yee <[email protected]>
wrote:
How much physical memory is on your testing machine?
I have a few Trinidad applications in production and don't see any of
the
performance issues you are having.
-Richard
On Fri, Jan 8, 2010 at 12:33 PM, Jan-Kees van Andel <
[email protected]> wrote:
I'm not sure, but I doubt the mailing list supports attachments.
Maybe you could provide a link to some image hosting site?
My first thought, reflection is darn cheap, especially since Java 5
and even more since Java 6. I'm no IBM JVM specialist, but I don't
think there are major differences with HotSpot... Compared with SQL
queries, backend transactions, web service calls, etc. reflective
method invocations really don't make a difference.
Having said that, what kind of application are you testing? Does
this
application have any I/O, locking or other expensive things that
may
be the cause of the CPU-time imbalance?
Also, what kind of load are you simulating on your application?
Long
sessions with not much users? Lots of short sessions? Hyperactive
users without any pauses?
/JK
Ps. How did you configure your profiler? Sampling or
tracing/instrumentation? Although I don't think it makes a
difference
in this case, sampling is less accurate...
2010/1/8 Ravi Kapoor <[email protected]>:
The actual call to getter method is only using 2% CPU. Rest 38%
is
being
used within trinidad classes.
I am attaching two screenshots to give you more details.
In first screenshot, you can see at the top left corner, total
CPU
units
taken by getProperty are 32391
getProperty calls javax.faces.el.ValueBinding.getValue which
calls
org.apache.myfaces.el.PropertyResolverImpl.getValue which calls
org.apache.myfaces.el.PropertyResolverImpl.getProperty which
calls
java.lang.reflect.Method.invoke.
In second screenshot you can see that Method.invoke is using only
1781
units
of CPU. Rest of the time is being spent within trinidad classes.
Does this help? Also the rest of trinidad using 45% CPU usage is
also
highly
concerning.
Thanks
Ravi
On Fri, Jan 8, 2010 at 1:47 PM, Jan-Kees van Andel
<[email protected]> wrote:
Hey,
Is it possible that the getProperty indirectly invokes some
expensive
computation? For example, do you have lots of logic inside your
getters?
Regards,
Jan-Kees
2010/1/8 Ravi Kapoor <[email protected]>:
Hi Matthias,
Here are the details:
Server: Websphere 6.1
Trinidad version: 1.0.7 (We cant upgrade to 2.0 until we
upgrade
websphere
which will happen in due course. Even then if this issue has
not
been
addressed, the problem may exist in 2.0 as well.)
OS: Windows (Even though I am measuring numbers on windows but
I
do
not
think this is OS specific)
Let me know if you need to know anything else.
Regards
Ravi
On Fri, Jan 8, 2010 at 1:09 AM, Matthias Wessendorf
<[email protected]>wrote:
Hello Ravi,
some more background would be good, e.g. what version of
Trinidad
etc.
-Matthias
On Thu, Jan 7, 2010 at 11:25 PM, Ravi Kapoor <
[email protected]>
wrote:
Has anybody done performance tests on trinidad application.
I
have
an
application and it appears that it is taking 80-90% of CPU
in
my
application, thus killing performance.
We ran load tests and our CPU went to 100% usage. At this
point
we
measured
how much time was being taken by each class/method. Here
are
some
interesting figures:
CPU usage by all Trinidad + myfaces classes = 80-90%
Myfaces CPU usage (without trinidad) = 8% (which implies
trinidad
is
taking
70-80% of CPU)
Total time taken by one method
(org.apache.myfaces.trinidad.bean.FacesBeanImpl.getProperty)
=
40%
Can anybody confirm that they have seen this behavior?
Or if somebody can confirm that this does not happen in
their
performance
tests, that should help too.
Thanks
Ravi
--
Matthias Wessendorf
blog: http://matthiaswessendorf.wordpress.com/
sessions: http://www.slideshare.net/mwessendorf
twitter: http://twitter.com/mwessendorf
