table_open_cache參數表示數據庫打開表的緩存數量，即表的高速緩存。每個連接進來，都會至少打開一個表緩存。例如，對于 200 個并行運行的連接，應該讓表的緩存至少有 200 N ，這里 N 是應用可以執行的SQL語句中所需要表的最大數量。此外&#x

Prometheus is an open source monitoring alarm system and time series database (TSDB) developed by SoundCloud.?It is inseparable from the popular containerized monitoring. There are many, there is no best, only more suitable for their own.