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Database Engine
This visualizer shows the complete lifecycle of a SQL query — from parsing through execution, caching, logging, and storage.
Each layer is a real component inside PostgreSQL, MySQL, and most relational databases.
Each layer is a real component inside PostgreSQL, MySQL, and most relational databases.
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EXECUTION LOG
BUFFER POOL
Hit ratio—
I/O STATS
Cache hits0
Disk reads0
WAL writes0
QUERY
Rows scanned0
Rows returned0
Last time—
CLOCK HAND
PositionSlot 0
Evictions0
B-TREE
Height2
Leaf nodes2
Keys5