In the example below, the lastest timestamp is the newest event in the warm bucket this can also be described as the last event to get indexed before the hot bucket rolls to warm. index=(name) | eval time=_time | eval indextime=_indextime | eval latency=(indextime-time) | stats count by avg(latency), min(latency), max(latency) by sourcetype.Future and past timestamps would be tough to get in _indextime and would be a server date and time issue instead of event time issues. When searching in Splunk, 99.999% of the time you will be searching against the _time parsed from the event. The actual arrival time is written to _indextime, and the timestamp embedded in the event is parsed and stored in _time. Events in Splunk are not generally received at the same time as indicated in the event timestamp the difference is usually a few seconds from the indexer arrival time to the event timestamp. In Splunk, there are two different times used. Query for larger environments: index=( name) sourcetype=( name) earliest=+5m latest=+5y.Query for small environments: index=* earliest=+5m latest=+5y.The Earliest Event Column is the oldest event currently Indexed in the index. For example: if the present time is midnight, then at 1 p.m., the events in the hot quarantine bucket would be eligible to roll to warm buckets as they have passed the present time of now but until the time passes, the future events will be kept in the Hot Quarantine bucket on the indexer. The Lastest Event column in the Splunk Index administration page shown in the example above shows that events will be current time events “in 13 hours.” This means at this time, they are events in the future.
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How to Check for Future and Past TimestampsĮxample: This is a quick way to identify indexes with future or past timestamps.
The quarantine constraints detect future and past events with varying degrees of time as they get indexed. These two IndexAttributes help quarantine events to better manage the flow of time throughout all indexes.
These attributes are quarantinePastSecs and quarantineFutureSecs to support the inspection of time at the indexing tier. The excellent news is that Splunk has added IndexAttributes in nf. With time being a critical component of Splunk, incorrect timestamps can severely impact the hot and warm buckets on the indexers hot buckets may roll too early, before they meet the set size of the attribute maxDataSize(default size 750mb), creating non-uniform-sized warm buckets. It is not uncommon, in large and small Splunk Enterprise environments, to have events with future or past timestamps. Back to the Present: Fixing Incorrect Timestamps in Splunk
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