weixin_34321977

prometheus 版本1.7 常用启动参数

参数是使用./prometheus -h 获取的，部分翻译参考网上已有资料。部分参数已经废弃了，因此我这里就没有列出来。

prometheus 版本1.7 常用启动参数：

日志类：

-log.level 可选值 [debug, info, warn, error, fatal] 例：-log.level "info"

-log.format 可选输出到syslog或者控制台例：-log.format "logger:syslog?appname=prom&local=7"

查询类：

-query.max-concurrency 20 最大支持的并发查询量

-query.staleness-delta 5m0s

Staleness delta allowance during expression evaluations.

-query.timeout 2m0s 查询超时时间，2分钟。超过自动被kill掉。

存储类：

-storage.local.checkpoint-dirty-series-limit 5000 崩溃恢复时候，只恢复5000个时序数据，这样减少了prometheus的恢复时间。如果是SSD盘，可以适当增大这个值。

-storage.local.checkpoint-interval 5m0s 5分钟执行一次落盘，将in-memory metrics and chunks持久化到磁盘。

-storage.local.chunk-encoding-version 1 chunks的编码格式，默认是1

-storage.local.engine "persisted" 开启持久化

-storage.local.index-cache-size.label-name-to-label-values 10485760 存放prometheus里面定义的 label名称的 index cache大小，默认10MB

-storage.local.path "/bdata/data/nowdb2"

-storage.local.retention 8760h0m0s 保存1年的数据

-storage.local.series-file-shrink-ratio 0.3 表示 30%的chunks被移除的时候才触发rewrite

-storage.local.num-fingerprint-mutexes 4096 当prometheus server端在进行checkpoint操作或者处理开销较大的查询的时候，采集指标的操作会有短暂的停顿，这是因为prometheus给时间序列分配的mutexes可能不够用，可以通过这个指标来增大预分配的mutexes，有时候可以设置到上万个。

-storage.local.series-sync-strategy "adaptive"

-storage.local.target-heap-size 2147483648 # prometheus独占的内存空间，默认2GB的内存空间，建议不要超过3GB

Web配置：

-web.listen-address ":9090"

-web.max-connections 512

-web.read-timeout 30s

目前在用的启动参数：

nohup ./prometheus -log.level "info" -log.format "logger:syslog?appname=prom&local=7" info -storage.local.checkpoint-dirty-series-limit 5000 -storage.local.checkpoint-interval 5m0s -storage.local.chunk-encoding-version 1 -storage.local.engine "persisted" -storage.local.index-cache-size.label-name-to-label-values 10485760 -storage.local.path "/bdata/data/nowdb2" -storage.local.retention 8760h0m0s -storage.local.series-file-shrink-ratio 0.3 -storage.local.series-sync-strategy "adaptive" -storage.local.target-heap-size 2147483648 &

重载配置文件：

kill -SIGHUP $(pidof prometheus)

关闭进程：

kill -SIGTERM $(pidof prometheus)

######################################################################################################

补充： ./prometheus -h的结果：

usage: prometheus []

-version false

Print version information.

-config.file "prometheus.yml"

Prometheus configuration file name.

== ALERTMANAGER ==

-alertmanager.notification-queue-capacity 10000

The capacity of the queue for pending alert manager notifications.

-alertmanager.timeout 10s

Alert manager HTTP API timeout.

-alertmanager.url

Comma-separated list of Alertmanager URLs to send notifications to.

== LOG ==

-log.format "\"logger:stderr\""

Set the log target and format. Example:

"logger:syslog?appname=bob&local=7" or "logger:stdout?json=true"

-log.level "\"info\""

Only log messages with the given severity or above. Valid levels:

[debug, info, warn, error, fatal]

== QUERY ==

-query.max-concurrency 20 最大支持的并发查询量

Maximum number of queries executed concurrently.

-query.staleness-delta 5m0s

Staleness delta allowance during expression evaluations.

-query.timeout 2m0s 查询超时时间，2分钟。超过自动被kill掉。

Maximum time a query may take before being aborted.

== STORAGE ==

-storage.local.checkpoint-dirty-series-limit 5000 崩溃恢复时候，只恢复5000个时序数据，这样减少了prometheus的恢复时间。如果是SSD盘，可以适当增大这个值。

If approx. that many time series are in a state that would require

a recovery operation after a crash, a checkpoint is triggered, even if

the checkpoint interval hasn't passed yet. A recovery operation requires

a disk seek. The default limit intends to keep the recovery time below

1min even on spinning disks. With SSD, recovery is much faster, so you

might want to increase this value in that case to avoid overly frequent

checkpoints. Also note that a checkpoint is never triggered before at

least as much time has passed as the last checkpoint took.

-storage.local.checkpoint-interval 5m0s 5分钟执行一次落盘，将in-memory metrics and chunks持久化到磁盘。

The time to wait between checkpoints of in-memory metrics and

chunks not yet persisted to series files. Note that a checkpoint is never

triggered before at least as much time has passed as the last checkpoint

took.

-storage.local.chunk-encoding-version 1 chunks的编码格式，默认是1

Which chunk encoding version to use for newly created chunks.

Currently supported is 0 (delta encoding), 1 (double-delta encoding), and

2 (double-delta encoding with variable bit-width).

-storage.local.dirty=false 是否强制开启crash recovery功能。默认 -storage.local.dirty=false的。

如果您怀疑数据库中的损坏引起的问题，可设置启动的时候 -storage.local.dirty=true强制执行crash recovery

If set, the local storage layer will perform crash recovery even if

the last shutdown appears to be clean.

-storage.local.engine "persisted"

Local storage engine. Supported values are: 'persisted' (full local

storage with on-disk persistence) and 'none' (no local storage).

-storage.local.index-cache-size.fingerprint-to-metric 10485760

The size in bytes for the fingerprint to metric index cache.

-storage.local.index-cache-size.fingerprint-to-timerange 5242880

The size in bytes for the metric time range index cache.

上面2个参数的作用： Increase the size if you have a large number of archived time series, i.e. series that have not received samples in a while but are still not old enough to be purged completely.

-storage.local.index-cache-size.label-name-to-label-values 10485760 存放prometheus里面定义的 label名称的 index cache大小，默认10MB

The size in bytes for the label name to label values index cache.

-storage.local.index-cache-size.label-pair-to-fingerprints 20971520 #

The size in bytes for the label pair to fingerprints index cache. Increase the size if a large number of time series share the same label pair or name.

-storage.local.max-chunks-to-persist 0 废弃的参数

Deprecated. This flag has no effect anymore.

-storage.local.memory-chunks 0 废弃的参数设定prometheus内存中保留的chunks的最大个数

Deprecated. If set, -storage.local.target-heap-size will be set to

this value times 3072.

-storage.local.num-fingerprint-mutexes 4096

The number of mutexes used for fingerprint locking.

当prometheus server端在进行checkpoint操作或者处理开销较大的查询的时候，采集指标的操作会有短暂的停顿，这是因为prometheus给时间序列分配的mutexes可能不够用，可以通过这个指标来增大预分配的mutexes，有时候可以设置到上万个。

-storage.local.path "data"

Base path for metrics storage.

-storage.local.pedantic-checks false 默认false 如果设置true，崩溃恢复时候会检查每一个序列文件

If set, a crash recovery will perform checks on each series file.

This might take a very long time.

-storage.local.retention 360h0m0s 历史数据存储多久，默认15天。

How long to retain samples in the local storage.

-storage.local.series-file-shrink-ratio 0.1

A series file is only truncated (to delete samples that have

exceeded the retention period) if it shrinks by at least the provided

ratio. This saves I/O operations while causing only a limited storage

space overhead. If 0 or smaller, truncation will be performed even for a

single dropped chunk, while 1 or larger will effectively prevent any

truncation.

用来控制序列文件rewrite的时机，默认是在10%的chunks被移除的时候进行rewrite，如果磁盘空间够大，不想频繁rewrite，可以提升该值，比如0.3，即30%的chunks被移除的时候才触发rewrite。

-storage.local.series-sync-strategy "adaptive"

When to sync series files after modification. Possible values:

'never', 'always', 'adaptive'. Sync'ing slows down storage performance

but reduces the risk of data loss in case of an OS crash. With the

'adaptive' strategy, series files are sync'd for as long as the storage

is not too much behind on chunk persistence.

控制写入数据之后，何时同步到磁盘，有'never', 'always', 'adaptive'. 同步操作可以降低因为操作系统崩溃带来数据丢失，但是会降低写入数据的性能。

默认为adaptive的策略，即不会写完数据就立刻同步磁盘，会利用操作系统的page cache来批量同步。

-storage.local.target-heap-size 2147483648 # prometheus独占的内存空间，默认2GB的内存空间，建议不要超过3GB

The metrics storage attempts to limit its own memory usage such

that the total heap size approaches this value. Note that this is not a

hard limit. Actual heap size might be temporarily or permanently higher

for a variety of reasons. The default value is a relatively safe setting

to not use more than 3 GiB physical memory.

-storage.remote.graphite-address