Scalability

chris889 — Fri, 21 Oct 2011 06:30:52 GMT

Dear CommunitityWe are planning to use activiti for a system which processes a couple of million orders per year, thus there will be quite a lot process instances running simultaniousely. Are there any case studies or something like that which show that activiti is able to handle such loads? Is anyb

Re: Scalability

mahavirj — Fri, 28 Oct 2011 17:54:07 GMT

In a single node test for a non-trivial process, i saw the following numbers.

These are with default configuration. I have not tried to optimize or tune anything

Scenario - Create process instance with 4 custom POJOs, one containing a list (usually its best to have not more than 1 or 2 lightweight pojos)
Tomcat/SqlServer
5 threads - 596/minute
10 threads - 936/minute
50 threads - 613/minute (server maxed out)

Was/Sqlserver
5 thread - 1359/minute
10 thread - 1701/minute
50 thread - 446/minute (server did not max out)

No exceptions in either case

Scenario - Claim task (display 25 tasks/page; each thread claims a random task on page)

Logic -
get 25 tasks on a page
processConfig.getTaskService().createTaskQuery().processDefinitionKey(PROCESS_KEY).taskUnnassigned().listPage(0,25);
select a task on page at random
processConfig.getTaskService().claim(task.getId(), user.getId());

Tomcat/SqlServer
5 threads - 521/minute
10 threads - 720/minute
50 threads - 394/minute

WAS/SqlServer
5 threads - 202/minute
10 threads - 241/minute
50 threads - 181/minute

# of exceptions were approx 10%, 20% and 50% respectively in both cases, all related to threads concurrently claiming the same task. That has more to do with process design than activiti itself

The only 'issue' was about timers/jobs. if there were a several process instances and timers are required, it took a while to trigger escalations. I had a task escalated if noone worked on it for 15 minutes
In a multi node environment, some other posts had said to run the jobexecutor on only one node, so that may be a constraint

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Scalability

Re: Scalability