Commit Graph

11 Commits

Author SHA1 Message Date
Brian Brazil 858c363e94 Fix panic when aggregator param is not a literal.
The return value for checkForSeriesSetExpansion
is always nil, simplify.

Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
2019-03-04 12:00:05 +00:00
Dan Cech 9f4cb06a37 use Welford/Knuth method to compute standard deviation and variance (#4533)
* use Welford/Knuth method to compute standard deviation and variance, avoids float precision issues
* use better method for calculating avg and avg_over_time

Signed-off-by: Dan Cech <dcech@grafana.com>
2018-08-26 10:28:47 +01:00
David King 6286c10df0 Fix OOM when a large K is used in topk queries (#4087)
This attempts to close #3973.

Handles cases where the length of the input vector to an aggregate topk
/ bottomk function is less than the K paramater. The change updates
Prometheus to allocate a result vector the same length as the input
vector in these cases.

Previously Prometheus would out-of-memory panic for large K values. This
change makes that unlikely unless the size of the input vector is
equally large.

Signed-off-by: David King <dave@davbo.org>
2018-04-16 09:03:04 +01:00
Brian Brazil 99905f82a6 Remove keep_common modifier.
See #3060
2017-10-05 13:27:48 +01:00
Brian Brazil 0303ccc6a7 Add quantile aggregator. 2016-07-21 00:09:19 +01:00
Brian Brazil 16690736ab Add count_values() aggregator.
This is useful for counting how many instances
of a job are running a particular version/build.

Fixes #622
2016-07-05 17:14:01 +01:00
Brian Brazil fa9cc15573 Add topk/bottomk tests for multiple buckets. 2016-07-04 13:18:28 +01:00
Brian Brazil 3b0c182eee Move topk/bottomk unittests over to aggregators. 2016-07-04 13:18:28 +01:00
Brian Brazil 3b89616d82 Allow on, ignoring, by and without wit empty laberls.
This offers new semantics in allowing on() for matching
two single-element vectors with no known common labels.
Previosuly this was often done using on(dummy).

This also allows making it explict that you meant
to do an aggregation without labels via by().

Fixes #1597.
2016-06-24 14:12:51 +01:00
Brian Brazil 9d0112d7cf Add without aggregator modifier.
This has the advantage that the user doesn't need
to list all labels they want to keep (as with "by")
but without having to worry about inconsistent labels
as when there's only one time series (as with "keeping_common").

Almost all aggregation should use this rather than the existing
two options as it's much less error prone and easier to maintain
due to not having to always add in "job" plus whatever other common
job-level labels you have like "region".
2016-02-08 14:05:33 +00:00
Brian Brazil b7ef0b45e8 Break aggregation tests out. Add missing tests. 2016-02-07 18:02:51 +00:00