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//opt/splunkforwarder/etc/system/README/limits.conf.example

#   Version 9.4.7
# CAUTION: Do not alter the settings in limits.conf unless you know what you are doing.
# Improperly configured limits may result in splunkd crashes and/or memory overuse.

[searchresults]
maxresultrows = 50000
# maximum number of times to try in the atomic write operation (1 = no retries)
tocsv_maxretry = 5
# retry period is 1/2 second (500 milliseconds)
tocsv_retryperiod_ms = 500

[subsearch]
# maximum number of results to return from a subsearch
maxout = 100
# maximum number of seconds to run a subsearch before finalizing
maxtime = 10
# time to cache a given subsearch's results
ttl = 300

[anomalousvalue]
maxresultrows = 50000
# maximum number of distinct values for a field
maxvalues = 100000
# maximum size in bytes of any single value (truncated to this size if larger)
maxvaluesize = 1000

[associate]
maxfields = 10000
maxvalues = 10000
maxvaluesize = 1000

# for the contingency, ctable, and counttable commands
[ctable]
maxvalues = 1000

[correlate]
maxfields = 1000

# for bin/bucket/discretize
[discretize]
maxbins = 50000
# if maxbins not specified or = 0, defaults to searchresults::maxresultrows

[inputcsv]
# maximum number of retries for creating a tmp directory (with random name in
# SPLUNK_HOME/var/run/splunk)
mkdir_max_retries = 100

[kmeans]
maxdatapoints = 100000000

[kv]
# when non-zero, the point at which kv should stop creating new columns
maxcols = 512

[rare]
maxresultrows = 50000
# maximum distinct value vectors to keep track of
maxvalues = 100000
maxvaluesize = 1000

[restapi]
# maximum result rows to be returned by /events or /results getters from REST
# API
maxresultrows = 50000

[search]
# how long searches should be stored on disk once completed
ttl = 86400

# the approximate maximum number of timeline buckets to maintain
status_buckets = 300

# the last accessible event in a call that takes a base and bounds
max_count = 10000

# the minimum length of a prefix before a * to ask the index about
min_prefix_len = 1

# the length of time to persist search cache entries (in seconds)
cache_ttl = 300

# By default, we will not retry searches in the event of indexer
# failures with indexer clustering enabled.
# Hence, the default value for search_retry here is false.
search_retry = false

# Timeout value for checking search marker files like hotbucketmarker or backfill
# marker.
check_search_marker_done_interval = 60

# Time interval of sleeping between subsequent search marker files checks.
check_search_marker_sleep_interval = 1

# The total number of concurrent searches is set to 10 manually. 
total_search_concurrency_limit = 100

# If number of CPUs in your machine is 14, then the total system-wide limit of
# concurrent historical searches on this machine is 20, which is
# max_searches_per_cpu x number_of_cpus + base_max_searches = 1 x 14 + 6 = 20.
max_searches_per_cpu = 1
base_max_searches = 6

# Whether maximum number of concurrent searches are enforced cluster-wide
# for admission of adhoc searches
shc_adhoc_quota_enforcement = on

# Enable throttling on both CPU and memory
remote_search_requests_throttling_type = per_cpu, physical_ram

# If the peer node has 48 cores, the following setting allows a maximum of 720 
# concurrent searches.
[search_throttling::per_cpu]
max_concurrent = 13

# If the peer has 64 GB of RAM, the following setting allows a maximum of 512 
# concurrent searches.
[search_throttling::physical_ram]
min_memory_per_search = 134217728

[scheduler]

# Percent of total concurrent searches that will be used by scheduler is
# total concurrency x max_searches_perc = 20 x 60% = 12 scheduled searches
# User default value (needed only if different from system/default value) when
# no max_searches_perc.<n>.when (if any) below matches.
max_searches_perc = 60

# Increase the value between midnight-5AM.
max_searches_perc.0 = 75
max_searches_perc.0.when = * 0-5 * * *

# More specifically, increase it even more on weekends.
max_searches_perc.1 = 85
max_searches_perc.1.when = * 0-5 * * 0,6

# Maximum number of concurrent searches is enforced cluster-wide by the
# captain for scheduled searches. For a 3 node SHC total concurrent
# searches = 3 x 20 = 60. The total searches (adhoc + scheduled) = 60, then
# no more scheduled searches can start until some slots are free.
shc_syswide_quota_enforcement = true

[slc]
# maximum number of clusters to create
maxclusters = 10000

[findkeywords]
#events to use in findkeywords command (and patterns UI)
maxevents = 50000

[stats]
maxresultrows = 50000
maxvalues = 10000
maxvaluesize = 1000

[top]
maxresultrows = 50000
# maximum distinct value vectors to keep track of
maxvalues = 100000
maxvaluesize = 1000

[search_optimization]
enabled = true

[search_optimization::predicate_split]
enabled = true

[search_optimization::predicate_push]
enabled = true

[search_optimization::predicate_merge]
enabled = true
inputlookup_merge = true
merge_to_base_search = true

[search_optimization::projection_elimination]
enabled = true
excluded_commands = eval, rename

[search_optimization::search_flip_normalization]
enabled = true

[search_optimization::reverse_calculated_fields]
enabled = true

[search_optimization::search_sort_normalization]
enabled = true

[search_optimization::replace_table_with_fields]
enabled = true

[search_optimization::replace_stats_cmds_with_tstats]
enabled = true
detect_search_time_field_collisions = true

[search_optimization::replace_datamodel_stats_cmds_with_tstats]
enabled = true