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Hi, how many concurrent users can jira and confluence datacenter handle?

Hi, how many concurrent users can jira and confluence datacenter handle?



5 answers

1 accepted

4 votes
Answer accepted
crf Atlassian Team Jan 17, 2015

Atlassian tends not to give exact numbers of how many users because there are just too many variables to give a meaningful answer, here.  Among other things, it depends on:

  • The hardware used:
    • The number of nodes in the cluster
    • Network technology (fiber channel?  gig-E?  100 Mbit?)
    • Hard drive technology (physical or SDD makes a huge difference, for example)
    • Number of cores and SMP vs NUMA
    • Heap size and GC strategy
  • Configuration metadata – For example, for JIRA some of the big factors include
    • Total number of issues
    • Number of custom fields
    • Number of distinct custom field configurations
    • Number of project roles
    • Number of permission schemes
  • User activity patterns – For example, for JIRA, users might spend various amounts of time
    • Using JIRA Agile rapid boards
    • Searching for issues
    • Editing or transitioning issues
    • Viewing project summaries
    • Viewing reports

There is simply no way to answer this question with so many other variables left open.  The best we can do is pick our own data set, hardware, and usage patterns and report the results.  That is what the JIRA Data Center Performance and Confluence Data Center Performance pages cover.

The only way for customers to get simple single-valued answers like this is to perform their own testing with the hardware that they intend to use and data and user usage patterns that model their own environment.  This fixes the variables to what matters most for them.

All true. But I reckon a couple of hundred concurrent users per data center node is a reasonable expectation to go for.

3 votes

Hey, Mario!

Actually, besides the license threshold according to the license you bought for JIRA or Confluence, Atlassian does not limit the number of concurrent users on an application.

That being said, the actual number of concurrent users will depend only on technical aspects of your infrastructure, like your servers' capacity (e.g. processing cores, RAM, I/O speeds...) and/or your network capacity (e.g. link speed).




With Data center, it also depends on the number of nodes. More the nodes, better the performance when there are large number of concurrent users. Maximum users on each node will depend on hardware, as Joao already mentioned!

crf Atlassian Team Jan 17, 2015

... within reason, of course. Adding additional nodes would at some point reach diminishing returns because the overhead of keeping the nodes consistent would offset the benefits of distributing the user traffic. We have not tried to push past 4 nodes in our in-house testing, and this is also the largest cluster I'm aware of in actual production at this time.

Thank you all, excellent answers!

If I have two JIRA instances as a datacenter sharing the data folder and the database which licences do I need?

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