クライアント接続に関する統計情報を返す

# mysqli::get_connection_stats

# mysqli_get_connection_stats

(PHP 5 >= 5.3.0, PHP 7)

mysqli::get_connection_stats -- mysqli_get_connection_stats — クライアント接続に関する統計情報を返す

### 説明

オブジェクト指向型

mysqli::get_connection_stats ( void ) : bool

手続き型

mysqli_get_connection_stats ( mysqli `$link` ) : array

クライアント接続に関する統計情報を返します。 mysqlnd でのみ使用可能です。

### パラメータ

`link`

  手続き型のみ: mysqli_connect() あるいは mysqli_init() が返すリンク ID。

### 返り値

成功した場合に接続の統計情報を含む配列、それ以外の場合に `FALSE` を返します。

### 例

例1 mysqli_get_connection_stats() の例

`<?php
$link = mysqli_connect();
print_r(mysqli_get_connection_stats($link));
?>`

上の例の出力は、 たとえば以下のようになります。

    Array
    (
        [bytes_sent] => 43
        [bytes_received] => 80
        [packets_sent] => 1
        [packets_received] => 2
        [protocol_overhead_in] => 8
        [protocol_overhead_out] => 4
        [bytes_received_ok_packet] => 11
        [bytes_received_eof_packet] => 0
        [bytes_received_rset_header_packet] => 0
        [bytes_received_rset_field_meta_packet] => 0
        [bytes_received_rset_row_packet] => 0
        [bytes_received_prepare_response_packet] => 0
        [bytes_received_change_user_packet] => 0
        [packets_sent_command] => 0
        [packets_received_ok] => 1
        [packets_received_eof] => 0
        [packets_received_rset_header] => 0
        [packets_received_rset_field_meta] => 0
        [packets_received_rset_row] => 0
        [packets_received_prepare_response] => 0
        [packets_received_change_user] => 0
        [result_set_queries] => 0
        [non_result_set_queries] => 0
        [no_index_used] => 0
        [bad_index_used] => 0
        [slow_queries] => 0
        [buffered_sets] => 0
        [unbuffered_sets] => 0
        [ps_buffered_sets] => 0
        [ps_unbuffered_sets] => 0
        [flushed_normal_sets] => 0
        [flushed_ps_sets] => 0
        [ps_prepared_never_executed] => 0
        [ps_prepared_once_executed] => 0
        [rows_fetched_from_server_normal] => 0
        [rows_fetched_from_server_ps] => 0
        [rows_buffered_from_client_normal] => 0
        [rows_buffered_from_client_ps] => 0
        [rows_fetched_from_client_normal_buffered] => 0
        [rows_fetched_from_client_normal_unbuffered] => 0
        [rows_fetched_from_client_ps_buffered] => 0
        [rows_fetched_from_client_ps_unbuffered] => 0
        [rows_fetched_from_client_ps_cursor] => 0
        [rows_skipped_normal] => 0
        [rows_skipped_ps] => 0
        [copy_on_write_saved] => 0
        [copy_on_write_performed] => 0
        [command_buffer_too_small] => 0
        [connect_success] => 1
        [connect_failure] => 0
        [connection_reused] => 0
        [reconnect] => 0
        [pconnect_success] => 0
        [active_connections] => 1
        [active_persistent_connections] => 0
        [explicit_close] => 0
        [implicit_close] => 0
        [disconnect_close] => 0
        [in_middle_of_command_close] => 0
        [explicit_free_result] => 0
        [implicit_free_result] => 0
        [explicit_stmt_close] => 0
        [implicit_stmt_close] => 0
        [mem_emalloc_count] => 0
        [mem_emalloc_ammount] => 0
        [mem_ecalloc_count] => 0
        [mem_ecalloc_ammount] => 0
        [mem_erealloc_count] => 0
        [mem_erealloc_ammount] => 0
        [mem_efree_count] => 0
        [mem_malloc_count] => 0
        [mem_malloc_ammount] => 0
        [mem_calloc_count] => 0
        [mem_calloc_ammount] => 0
        [mem_realloc_count] => 0
        [mem_realloc_ammount] => 0
        [mem_free_count] => 0
        [proto_text_fetched_null] => 0
        [proto_text_fetched_bit] => 0
        [proto_text_fetched_tinyint] => 0
        [proto_text_fetched_short] => 0
        [proto_text_fetched_int24] => 0
        [proto_text_fetched_int] => 0
        [proto_text_fetched_bigint] => 0
        [proto_text_fetched_decimal] => 0
        [proto_text_fetched_float] => 0
        [proto_text_fetched_double] => 0
        [proto_text_fetched_date] => 0
        [proto_text_fetched_year] => 0
        [proto_text_fetched_time] => 0
        [proto_text_fetched_datetime] => 0
        [proto_text_fetched_timestamp] => 0
        [proto_text_fetched_string] => 0
        [proto_text_fetched_blob] => 0
        [proto_text_fetched_enum] => 0
        [proto_text_fetched_set] => 0
        [proto_text_fetched_geometry] => 0
        [proto_text_fetched_other] => 0
        [proto_binary_fetched_null] => 0
        [proto_binary_fetched_bit] => 0
        [proto_binary_fetched_tinyint] => 0
        [proto_binary_fetched_short] => 0
        [proto_binary_fetched_int24] => 0
        [proto_binary_fetched_int] => 0
        [proto_binary_fetched_bigint] => 0
        [proto_binary_fetched_decimal] => 0
        [proto_binary_fetched_float] => 0
        [proto_binary_fetched_double] => 0
        [proto_binary_fetched_date] => 0
        [proto_binary_fetched_year] => 0
        [proto_binary_fetched_time] => 0
        [proto_binary_fetched_datetime] => 0
        [proto_binary_fetched_timestamp] => 0
        [proto_binary_fetched_string] => 0
        [proto_binary_fetched_blob] => 0
        [proto_binary_fetched_enum] => 0
        [proto_binary_fetched_set] => 0
        [proto_binary_fetched_geometry] => 0
        [proto_binary_fetched_other] => 0
    )

### 参考

- 統計情報についての説明