Hi Juan,

Thanks for the response.

I agree web server can handle only limited number of concurrent requests. But Why it is failing with SSL handshake failure for few requests, Can't the JBOSS wait and serve the request? We can spare the delay but not with the request fails. So Is there a configuration in oVirt which can be tuned to achieve this?

Thanks,
Hari

On Wed, Mar 7, 2018 at 7:05 PM, Juan Hernández <jhernand@redhat.com> wrote:
The first thing you will need to change for such a test is the number of simultaneous connections accepted by the Apache web server: by default the max is 256. See the Apache documentation here:

  https://httpd.apache.org/docs/2.4/mod/mpm_common.html#maxrequestworkers

In addition I also suggest that you consider using the "worker" multi-processing module instead of the "prefork", as it usually works better when talking to a Java application server, because it re-uses connections better.

On 03/07/2018 02:20 PM, Hari Prasanth Loganathan wrote:
Hi Team,

*Description of problem:*

I am trying to achieve 1000 concurrent request to oVirt. What are the
tunable parameters to achieve this?

I tried to perform the benchmarking for ovirt engine using Apache benchmark
using the same SSO token.

ab -n 1000 -c 500 -k -H "accept: application/json" -H "Authorization:
Bearer SSOTOKEN" https://172.30.56.70/ovirt-engine/
 <https://172.30.56.70/ovirt-engine/api/vms/5440271b-afb3-48bb-9ff1-076fc07ebf50/statistics>

When the number of concurrent request is 500, we are getting more than 100
failures with the following error,

SSL read failed (1) - closing connection
139620982339352:error:

NOTE: It is scaling for concurrent request below 500.

I used the profiler to get the memory and CPU and it seems very less,

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+
COMMAND
30413 ovirt     20   0 4226664 882396   6776 S 126.0 23.0  27:48.53 java

Configuration of the machine in which Ovirt is deployed :

RAM - 4GB,
Hard disk - 100GB,
core processor - 2,
OS - Cent7.x.

In which 2GB is allocated to oVirt.


Version-Release number of selected component (if applicable):

4.2.2


How reproducible:

If the number of concurrent requests are above 500, we are easily facing
this issue.


 *Actual results:*

SSL read failed (1) - closing connection
139620982339352:error:

 *Expected results:*

Request success.


Thanks,
Hari



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