* comment: Requests per second for reindex operations ("adaptive" for auto).
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexReindexRequestsPerSecond();

    /**
     * Get the value for the key 'index.reindex.refresh'. <br>
     * The value is, e.g. false <br>
     * comment: Whether to refresh the index after reindexing.

     */
    protected String getReindexRequestsPerSecound(final FessConfig fessConfig) {
        if (StringUtil.isBlank(fessConfig.getIndexReindexRequestsPerSecond())) {
            return null;
        }
        final String value = fessConfig.getIndexReindexRequestsPerSecond();
        if ("adaptive".equalsIgnoreCase(value)) {
            if (fessConfig.availableProcessors() >= 4) {
                return null;