Splunk 5.0.1 ,
limit.conf
[subsearch]
maxout=10000
maxtime = 1800
What version of Splunk? Did you change anything in limits.conf?
Splunk Search Head 2 CPU 8 core, 8G memory
I try, thank you very much!
How many CPU and How Much RAM does your Search Head have?
Go to Manage -> Access controls -> Roles. I suspect you are a Power user (or other role with similar job limit settings), so either create a new role or edit Power to increase "Limit concurrent search jobs" to a higher number.
It depends on the role of the user and maximum number of searches allowed to that use. You can see them in access control->roles->Role_Name if you are an ADMIN. There you can modify the number of searched availed to the role, which the user belong to. Thanks.