system.columns system.columns Contains information about columns in all the tables. You can use this table to get information similar to the DESCRIBE TABLE query, but for mul...

Monitoring a HAWQ System Using hawq_toolkit Monitoring System State Checking System State Viewing Master and Segment Status and Configuration Checking Disk Space Usage Checking ...

KubeSphere Logging System What is KubeSphere Logging System Enable Logging before Installation Installing on Linux Installing on Kubernetes Enable Logging after Installation ...

File system events Concepts Example File system events Concepts Use Deno.watchFs to watch for file system events. Results may vary between operating systems. Example T...

File system events Concepts Example File system events Concepts Use Deno.watchFs to watch for file system events. Results may vary between operating systems. Example T...

system.zookeeper system.zookeeper The table does not exist if ZooKeeper is not configured. Allows reading data from the ZooKeeper cluster defined in the config.The query must h...

system.roles See Also system.roles Contains information about configured roles . Columns: name (String ) — Role name. id (UUID ) — Role ID. storage (String ) — Path to t...

system.mutations system.mutations The table contains information about mutations of MergeTree tables and their progress. Each mutation command is represented by a single row....

system.merges system.merges Contains information about merges and part mutations currently in process for tables in the MergeTree family. Columns: database (String) — The n...

system.events system.events Contains information about the number of events that have occurred in the system. For example, in the table, you can find how many SELECT queries w...