function bp_core_install_blog_tracking() {
	$sql             = array();
	$charset_collate = $GLOBALS['wpdb']->get_charset_collate();
	$bp_prefix       = bp_core_get_table_prefix();

	$sql[] = "CREATE TABLE {$bp_prefix}bp_user_blogs (
				id bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY,
				user_id bigint(20) NOT NULL,
				blog_id bigint(20) NOT NULL,
				KEY user_id (user_id),
				KEY blog_id (blog_id)
			) {$charset_collate};";

	$sql[] = "CREATE TABLE {$bp_prefix}bp_user_blogs_blogmeta (
				id bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY,
				blog_id bigint(20) NOT NULL,
				meta_key varchar(255) DEFAULT NULL,
				meta_value longtext DEFAULT NULL,
				KEY blog_id (blog_id),
				KEY meta_key (meta_key(191))
			) {$charset_collate};";

	dbDelta( $sql );
}