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max_file_field_buffer
Maximum file field adaptive buffer size, bytes. Optional, default is 8 MB, minimum is 1 MB.
File field buffer is used to load files referred to from
sql_file_field columns.
This buffer is adaptive, starting at 1 MB at first allocation,
and growing in 2x steps until either file contents can be loaded,
or maximum buffer size, specified by max_file_field_buffer
directive, is reached.
Thus, if there are no file fields are specified, no buffer
is allocated at all. If all files loaded during indexing are under
(for example) 2 MB in size, but max_file_field_buffer
value is 128 MB, peak buffer usage would still be only 2 MB. However,
files over 128 MB would be entirely skipped.
Example:
max_file_field_buffer = 128M
