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What is the max value for maxsearches? Is there a way to NOT have a max (set to 0 or -1)?

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What is the max value for maxsearches? Is there a way to NOT have a max (set to 0 or -1)?

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Splunk Employee
Splunk Employee

You can adjust this, but the primary calculation is a practical limit on performance. This is controlled in limits.conf.

The maximum number of concurrent searches is calculated based on max_searches_per_cpu times the number of CPU cores in the system (as reported by the OS, which means VMs often lie when given multiple vCPUs but are running on a small number of hardware cores thanks to threading and shady hypervisor oversubscription models) + base_max_searches.

max_searches_per_cpu defaults to 1
base_max_searches defaults to 6

Therefore, in a reference system with 12 cores, you have 1 x 12 + 6 = 18.

If you need to crank this up, you can linearly scale this by core count using max_searches_per_cpu by setting it to 2 or more. This changes the math to be 2 x 12 + 6 = 30 or 3 x 12 + 6 = 42. If you just want to tweak it up by a fixed amount, adjust base_max_searches to a higher value.

All of the above comes with the caveat that generally these are bad ideas to implement in a production setting unless you have a highly underutilized system performing large numbers of extremely low memory and low CPU usage searches.

Jesse Trucks
Minister of Magic


The following is the current configuration in our environment. We are getting max_concurrent limit reached on one of the three Search Heads for specific Saved Search. It does not happen on rest of the two Search Heads.
Search Head:- 3x16+10=58
Search Peer :- 1x20+6=26

Is it necessary to maintain identical parameters on both Search peers and Search heads?
Shall i increase max_searches_per_cpu on Search Peers from 1 to 2?

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