I have seen sizing information for servers, but how high do you judge the maintenance (server, software, plugins) and administrative overhead (besides creating new users and managing groupmembership) for a 250 userbase installation of JIRA and confluence ? (E.g. Compared to sharepoing or alfresco sites)
You can't really "size" the effort involved without referring to the complexity of what you're going to do. If you're going to use the applications pretty much off-the-shelf and not fiddle around with themes, non-atlassian integrations, workflows, addons, fields, and and and, then the maintenance is quite low - you'll need to think about a part-time admin who can do the odd upgrade. But if you are power-users who are going to heavily customise lots of it, then you'll need more. I've looked after several 200-ish user sites. Some needed me for a day a month, others near-on full time.
In addition to the very good answer from @Nic Brough [Adaptavist], In case you are wondering for best practices in terms of tuning Confluence instances (depending on the instance size, you may have to perform that), here are very good starting points:
This community is celebrating its one-year anniversary and Atlassian co-founder Mike Cannon-Brookes has all the feels.Read more
Hi Community! Kesha (kay-sha) from the Confluence marketing team here! Can you share stories with us on how your non-technical (think Marketing, Sales, HR, legal, etc.) teams are using Confluen...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs