Daily maximum of concurrent Logins


Hi, I'm very new to Splunk and would appreciate some help getting started. My logfile is comprised of messages with either "Login" or "Logout" in the text along with a date & time. I would like a report/graph by day, showing the highest number of concurrent logins reached for each day.
Thanks in advance

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0 Karma


Thanks everyone, I think I figured it out but it looks pretty messy:

"Login" OR "Disconnected" | eval count_adj = if(like(Message,"%Login%"),1,-1) | accum count_adj as count_max | eval count_max = if(count_max<0,0,count_max) | timechart max(count_max) span=1d

Just curious if there's a better way?

0 Karma

Splunk Employee
Splunk Employee

I suppose that you mean that with a log like

2013/11/28 10:00:00 user=a action=login
2013/11/28 12:00:00 user=b action=login
2013/11/28 13:00:00 user=b action=logout
2013/11/28 15:00:00 user=a action=logout

you are looking to something like the hourly concurrency.

2013/11/28 09:00:00 concurrency=0
2013/11/28 10:00:00 concurrency=1
2013/11/28 11:00:00 concurrency=1
2013/11/28 12:00:00 concurrency=2 <--- max
2013/11/28 13:00:00 concurrency=1
2013/11/28 14:00:00 concurrency=1
2013/11/28 15:00:00 concurrency=1
2013/11/28 16:00:00 concurrency=0

with a simple action=login| bucket _time span=1h | stats dc(user) by _time
you will only see the hours when the login occur, not the hours while the login is still active.

Look for the command makecontinuous to expand your login status


Hey pytb,
Not 100% sure what you mean.

I'm guessing here but are you wanting to compare the login in and logout event for a username or ipaddress and then work out at what point in time you had the highest number of users?
Is that what you're after?

It might be worth adding a couple of lines of your csv just to help clarify.

Path Finder

Hello pytb,

i'm not sure what you mean with concurrent logins reached for each day, but maybe take a look at

So, just add | timechart span=1d to your search string and you will get a timechart. You can visualize this timechart as line or whatever you want to use.

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