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WAL & Archive Mode

PostgreSQL Troubleshooting

Problem Set wal_keep_size Set archive_mode=on Unset archive_command This will cause wal_keep_size to not work and the disk to fill up. wal_keep_size Controls the minimum number of WAL files that PostgreSQL will retain, even if they have been used by strea...

database
archive-mode
wal
postgresql

Storage

Prometheus Concept

https://prometheus.io/docs/prometheus/latest/storage/ Prometheus includes a local on-disk time series database, but also optionally integrates with remote storage systems. Local storage Prometheus's local time series database stores data in a custom, highly e...

prometheus
tsdb
wal
storage
middleware

Write Ahead Log

Prometheus Troubleshooting

Disk Watermark flood stage disk watermark [95%] exceeded on ... Launch Params --storage.tsdb.retention.time=7d --storage.tsdb.retention.size=50GB --storage.tsdb.wal-compression WAL 目录不受 tsdb.retention.size 控制 WAL 目录会定期自动压缩到 block 重启会强制压缩 WAL 数据 --storage....

troubleshooting
wal
prometheus
middleware

Storage CN

Prometheus Concept

https://prometheus.io/docs/prometheus/latest/storage/ Prometheus 包含一个本地磁盘上的时间序列数据库,也可以选择集成远程存储系统。 本地存储 Prometheus 的本地时序数据库以一种自定义且高效的格式将数据存储在本地存储中。 磁盘布局 Prometheus 会将采集到的样本按两个小时为一组划分为数据块(block)。每个两个小时的数据块对应一个目录,该目录中包含: 一个 chunks 子目录(存放该时间段内所有时间序列的样本) 一个元数据文件(...

tsdb
wal
storage
prometheus
middleware

Delete WAL For Launch

Prometheus Tricks

Sometimes readness probe will be timeout because of the large wal logs. If the data is not important, just delete it. kubectl exec -it xxx -- /bin/sh rm -rf /prometheus/wal/ kubectl rollout restart deploy/sts xxx

readness
wal
prometheus