system.filesystem_read_prefetches_log

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Contiene un historial de todas las precargas realizadas durante la lectura de tablas MergeTree basadas en un sistema de archivos remoto.

Es seguro truncar o eliminar esta tabla en cualquier momento.

Columnas:

hostname (LowCardinality(String))
event_date (Date)
event_time (DateTime)
query_id (String)
path (String)
offset (UInt64)
size (Int64)
prefetch_submit_time (DateTime64(6))
priority (Int64)
prefetch_execution_start_time (DateTime64(6))
prefetch_execution_end_time (DateTime64(6))
prefetch_execution_time_us (UInt64)
state (String)
thread_id (UInt64)
reader_id (String)