Focus: Database performance, monitoring, and SQL optimization.
If you see a high "Wait Thread Count" alongside a high "Active Count," you are experiencing connection pool exhaustion . You either need to increase the pool size, optimize long-running transactions, or fix connection leaks.
Define three severity levels:
A Druid’s “monitor” was not a screen or a gauge, but their own heightened senses. To be a Druid was to constantly observe:
Regardless of Druid-specific metrics, always monitor: druid monitor
: See exactly which queries are slow, how many times they’ve run, and their peak execution times.
You will be greeted with a login screen. After entering the credentials configured above, you enter the command center. Define three severity levels: A Druid’s “monitor” was
Describes Druid's distributed, column-oriented architecture designed for low-latency data ingestion and sub-second query performance on billion-row tables. Key Sections: Architecture: Split into three main node types— (coordination), (routing), and (ingestion and storage). Data Format:
Current active, idle, and peak connection counts. After entering the credentials configured above, you enter
This section provides a bird's-eye view of your database connectivity. You can monitor ActiveCount to ensure your pool isn't exhausted and check PoolingCount to see how many connections are ready for reuse.
The is the visualization interface for this surveillance capability. It is a built-in web console that provides real-time insights into your database interactions.