Commit graph

40 commits

Author SHA1 Message Date
Julius Volz 7e9ecaac3a Add count_scalar() function.
Change-Id: I63f09dd0479d0a6b016f5f857dd39dcbda56c7f9
2014-01-30 13:07:26 +01:00
Julius Volz 0378c2ca1f Nonexistent labels in BY-clauses shouldn't propagate to result.
This fixes bug 2. of https://github.com/prometheus/prometheus/issues/374

Change-Id: Ia4a13153616bafce5bf10597966b071434422d09
2014-01-24 16:05:30 +01:00
Julius Volz 6dc36d0c3e Don't keep extra labels in aggregations by default.
MIN/MAX/SUM/AVG/COUNT aggregations will now by default drop all labels that are
not specifically part of a BY-clause, even if a label value is the same within
all timeseries of an aggregation group. The old behavior of keeping extra
labels may still be switched on by adding KEEPING_EXTRA to the end of an
aggregation statement:

  sum(http_requests) by (job, method) keeping_extra

I'm open to better syntax/naming suggestions.

Change-Id: I21d3fe7af9e98552ce3dffa3ce7c0a4ba4c0b4a4
2013-12-16 12:53:10 +01:00
Julius Volz 740d448983 Use custom timestamp type for sample timestamps and related code.
So far we've been using Go's native time.Time for anything related to sample
timestamps. Since the range of time.Time is much bigger than what we need, this
has created two problems:

- there could be time.Time values which were out of the range/precision of the
  time type that we persist to disk, therefore causing incorrectly ordered keys.
  One bug caused by this was:

  https://github.com/prometheus/prometheus/issues/367

  It would be good to use a timestamp type that's more closely aligned with
  what the underlying storage supports.

- sizeof(time.Time) is 192, while Prometheus should be ok with a single 64-bit
  Unix timestamp (possibly even a 32-bit one). Since we store samples in large
  numbers, this seriously affects memory usage. Furthermore, copying/working
  with the data will be faster if it's smaller.

*MEMORY USAGE RESULTS*
Initial memory usage comparisons for a running Prometheus with 1 timeseries and
100,000 samples show roughly a 13% decrease in total (VIRT) memory usage. In my
tests, this advantage for some reason decreased a bit the more samples the
timeseries had (to 5-7% for millions of samples). This I can't fully explain,
but perhaps garbage collection issues were involved.

*WHEN TO USE THE NEW TIMESTAMP TYPE*
The new clientmodel.Timestamp type should be used whenever time
calculations are either directly or indirectly related to sample
timestamps.

For example:
- the timestamp of a sample itself
- all kinds of watermarks
- anything that may become or is compared to a sample timestamp (like the timestamp
  passed into Target.Scrape()).

When to still use time.Time:
- for measuring durations/times not related to sample timestamps, like duration
  telemetry exporting, timers that indicate how frequently to execute some
  action, etc.

*NOTE ON OPERATOR OPTIMIZATION TESTS*
We don't use operator optimization code anymore, but it still lives in
the code as dead code. It still has tests, but I couldn't get all of them to
pass with the new timestamp format. I commented out the failing cases for now,
but we should probably remove the dead code soon. I just didn't want to do that
in the same change as this.

Change-Id: I821787414b0debe85c9fffaeb57abd453727af0f
2013-12-03 09:11:28 +01:00
Julius Volz 35ee2cd3cb Add alertmanager notification support to Prometheus.
Alert definitions now also have mandatory SUMMARY and DESCRIPTION fields
that get sent along a firing alert to the alert manager.
2013-07-30 17:23:41 +02:00
Julius Volz 64b0ade171 Swap rules lexer for much faster one.
This swaps github.com/kivikakk/golex for github.com/cznic/golex.

The old lexer would have taken 3.5 years to load a set of 5000 test rules
(quadratic time complexity for input length), whereas this one takes only 32ms.
Furthermore, since the new lexer is embedded differently, this gets rid of the
global parser variables and makes the rule loader fully reentrant without a
lock.
2013-07-11 19:35:29 +02:00
Matt T. Proud 30b1cf80b5 WIP - Snapshot of Moving to Client Model. 2013-06-25 15:52:42 +02:00
Julius Volz fc97e688c6 Improve printing of rules and expressions. 2013-06-11 11:39:31 +02:00
Matt T. Proud 2c3df44af6 Ensure database access waits until it is started.
This commit introduces a channel message to ensure serving
state has been reached with the storage stack before anything attempts
to use it.
2013-06-06 10:42:21 +02:00
Julius Volz 51689d965d Add debug timers to instant and range queries.
This adds timers around several query-relevant code blocks. For now, the
query timer stats are only logged for queries initiated through the UI.
In other cases (rule evaluations), the stats are simply thrown away.

My hope is that this helps us understand where queries spend time,
especially in cases where they sometimes hang for unusual amounts of
time.
2013-06-05 18:32:54 +02:00
Julius Volz 138334fb31 Fix handling of negative deltas for non-counter values. 2013-05-28 17:36:53 +02:00
Julius Volz 750f862d9a Use GetBoundaryValues() for non-counter deltas. 2013-05-22 19:13:47 +02:00
Bernerd Schaefer 63d9988b9c Drop unused writeMemoryInterval 2013-05-14 17:03:03 +02:00
Bernerd Schaefer aa96c7d141 Fix rules_test.go
This is smelly, but for now we copy a helper method from the metric
tests into rules.
2013-05-14 16:55:18 +02:00
Julius Volz 0877680761 Implement a COUNT ... BY aggregation operator.
This also removes the now obsolete scalar count() function and corrects the
expressions test naming (broken in
2202cd71c9 (L6R59))
so that the expression tests will actually run.
2013-05-08 16:35:16 +02:00
Julius Volz 56324d8ce2 Make AST query storage non-global. 2013-05-07 13:15:10 +02:00
Matt T. Proud ce45787dbf Storage interface to TieredStorage.
This commit drops the Storage interface and just replaces it with a
publicized TieredStorage type.  Storage had been anticipated to be
used as a wrapper for testability but just was not used due to
practicality.  Merely overengineered.  My bad.  Anyway, we will
eventually instantiate the TieredStorage dependencies in main.go and
pass them in for more intelligent lifecycle management.

These changes will pave the way for managing the curators without
Law of Demeter violations.
2013-05-03 15:54:14 +02:00
Julius Volz 2202cd71c9 Track alerts over time and write out alert timeseries. 2013-04-26 14:35:21 +02:00
Julius Volz c0601abf46 Implement initial no-op alert parsing and rule parsing tests. 2013-04-23 13:48:24 +02:00
Matt T. Proud f9e99bd08a Refresh SampleValue to 64-bit floating point.
We always knew that this needed to be fixed.
2013-04-21 20:31:50 +02:00
Julius Volz 5f5ea03105 Run "make format". 2013-04-16 17:23:59 +02:00
Julius Volz 1cff4f3d91 Fix rate() per-second adjustment.
This got broken during the depointerization of the Vector type.
2013-04-15 14:41:34 +02:00
juliusv 62f33f1fc2 Merge pull request #138 from prometheus/julius-fix-aliasing
Correct delta()/rate() intervals and temporal aliasing.
2013-04-15 05:38:48 -07:00
Julius Volz d53b8cf956 Correct delta()/rate() intervals and temporal aliasing. 2013-04-15 12:30:46 +02:00
Julius Volz 000f6a2e23 Allow lower-case BY operator. 2013-04-15 11:56:23 +02:00
Julius Volz 1bc83e1b65 Also allow lower-cased aggregation ops. 2013-04-11 18:25:22 +02:00
Julius Volz 6cb3c51d24 Add sort() and sort_desc() expression language functions. 2013-04-10 18:05:45 +02:00
Julius Volz e31591e6fe Allow single-letter identifiers (metric and label names). 2013-03-28 18:37:54 +01:00
Julius Volz ec413459fa Depointerize Matrix/Vector types as well as time.Time arguments. 2013-03-28 18:07:12 +01:00
Julius Volz 55ca65aa6e More userfriendly output when we fail to create the tiered storage. 2013-03-27 11:25:05 +01:00
Matt T. Proud b86b0ea41a Create temporary directory handler. 2013-03-26 18:09:25 +01:00
Julius Volz 8e4c5b0cea Use AST query analyzer and views with tiered storage. 2013-03-21 18:16:52 +01:00
Matt T. Proud 41068c2e84 Checkpoint. 2013-03-21 18:06:51 +01:00
Julius Volz 16d9dcd6a8 Add copyright notices to all remaining files. 2013-02-07 11:49:04 +01:00
Matt T. Proud ea54751431 Update import paths to new location.
This repository moved from matttproud/prometheus to
prometheus/prometheus, and all import paths need to be updated.
2013-01-27 18:49:45 +01:00
Julius Volz c049ae39af Cleanups to rules/persistence adapter code. 2013-01-25 12:22:55 +01:00
Julius Volz a85204a0a4 Add support for matrix duration strings without quotes. 2013-01-22 02:27:26 +01:00
Matt T. Proud efe61c18fa Refactor target scheduling to separate facility.
``Target`` will be refactored down the road to support various
nuanced endpoint types.  Thusly incorporating the scheduling
behavior within it will be problematic.  To that end, the scheduling
behavior has been moved into a separate assistance type to improve
conciseness and testability.

``make format`` was also run.
2013-01-13 10:43:37 +01:00
Julius Volz 483bd81a44 Allow grammar to parse both rules and single expressions. 2013-01-11 01:17:37 +01:00
Julius Volz 56384bf42a Add initial config and rule language implementation. 2013-01-07 23:43:36 +01:00