These settings are available in system.settings and are autogenerated from source.
filesystem_prefetch_max_memory_usage
Type
NonZeroUInt64
Default
1073741824
Maximum memory usage for prefetches.
Cloud default value: 10% of total memory.
filesystem_prefetch_step_bytes
Type
UInt64
Default
0
Prefetch step in bytes. Zero means auto - approximately the best prefetch step will be auto deduced, but might not be 100% the best. The actual value might be different because of setting filesystem_prefetch_min_bytes_for_single_read_task
filesystem_prefetch_step_marks
Type
UInt64
Default
0
Prefetch step in marks. Zero means auto - approximately the best prefetch step will be auto deduced, but might not be 100% the best. The actual value might be different because of setting filesystem_prefetch_min_bytes_for_single_read_task