#include <nghttp2/nghttp2.h>

void nghttp2_option_set_max_deflate_dynamic_table_size(nghttp2_option *option, size_t val)

This option sets the maximum dynamic table size for deflating header fields. The default value is 4KiB. In HTTP/2, receiver of deflated header block can specify maximum dynamic table size. The actual maximum size is the minimum of the size receiver specified and this option value.