mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-21 00:07:36 -07:00
096fa0f8b2
- Staleness delta is no a proper function parameter and not replicated from package ast. - Named type 'chunks' replaced by explicit '[]chunk' to avoid confusion. - For the same reason, replaced 'chunkDescs' by '[]*chunkDescs'. - Verified that math.Modf is not a speed enhancement over conversion (actually 5x slower). - Renamed firstTimeField, lastTimeField into chunkFirstTime and chunkLastTime. - Verified unpin() is sufficiently goroutine-safe. - Decided not to update archivedFingerprintToTimeRange upon series truncation and added a rationale why. Change-Id: I863b8d785e5ad9f71eb63e229845eacf1bed8534
110 lines
3.2 KiB
Go
110 lines
3.2 KiB
Go
// Copyright 2014 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package local
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import (
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"time"
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clientmodel "github.com/prometheus/client_golang/model"
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)
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// memorySeriesPreloader is a Preloader for the memorySeriesStorage.
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type memorySeriesPreloader struct {
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storage *memorySeriesStorage
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pinnedChunkDescs []*chunkDesc
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}
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// PreloadRange implements Preloader.
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func (p *memorySeriesPreloader) PreloadRange(
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fp clientmodel.Fingerprint,
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from clientmodel.Timestamp, through clientmodel.Timestamp,
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stalenessDelta time.Duration,
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) error {
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cds, err := p.storage.preloadChunksForRange(fp, from, through, stalenessDelta)
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if err != nil {
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return err
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}
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p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
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return nil
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}
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/*
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// GetMetricAtTime implements Preloader.
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func (p *memorySeriesPreloader) GetMetricAtTime(fp clientmodel.Fingerprint, t clientmodel.Timestamp) error {
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cds, err := p.storage.preloadChunks(fp, &timeSelector{
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from: t,
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through: t,
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})
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if err != nil {
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return err
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}
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p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
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return nil
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}
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// GetMetricAtInterval implements Preloader.
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func (p *memorySeriesPreloader) GetMetricAtInterval(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp, interval time.Duration) error {
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cds, err := p.storage.preloadChunks(fp, &timeSelector{
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from: from,
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through: through,
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interval: interval,
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})
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if err != nil {
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return err
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}
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p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
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return
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}
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// GetMetricRange implements Preloader.
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func (p *memorySeriesPreloader) GetMetricRange(fp clientmodel.Fingerprint, t clientmodel.Timestamp, rangeDuration time.Duration) error {
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cds, err := p.storage.preloadChunks(fp, &timeSelector{
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from: t,
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through: t,
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rangeDuration: through.Sub(from),
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})
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if err != nil {
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return err
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}
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p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
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return
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}
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// GetMetricRangeAtInterval implements Preloader.
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func (p *memorySeriesPreloader) GetMetricRangeAtInterval(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp, interval, rangeDuration time.Duration) error {
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cds, err := p.storage.preloadChunks(fp, &timeSelector{
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from: from,
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through: through,
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interval: interval,
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rangeDuration: rangeDuration,
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})
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if err != nil {
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return err
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}
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p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
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return
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}
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*/
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// Close implements Preloader.
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func (p *memorySeriesPreloader) Close() {
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// TODO: Idea about a primitive but almost free heuristic to not evict
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// "recently used" chunks: Do not unpin the chunks right here, but hand
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// over the pinnedChunkDescs to a manager that will delay the unpinning
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// based on time and memory pressure.
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for _, cd := range p.pinnedChunkDescs {
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cd.unpin()
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}
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}
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