These settings are available in system.settings and are autogenerated from source.
max_read_buffer_size
Type
NonZeroUInt64
Default
1048576
The maximum size of the buffer to read from the filesystem. Values above 256 MiB are clamped to 256 MiB, as a read buffer never needs to be larger.
max_read_buffer_size_local_fs
Type
UInt64
Default
131072
The maximum size of the buffer to read from local filesystem. If set to 0 then max_read_buffer_size will be used. Values above 256 MiB are clamped to 256 MiB, as a read buffer never needs to be larger.
max_read_buffer_size_remote_fs
Type
UInt64
Default
0
The maximum size of the buffer to read from remote filesystem. If set to 0 then max_read_buffer_size will be used. Values above 256 MiB are clamped to 256 MiB, as a read buffer never needs to be larger.