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현재 옥타코어에
메모리 16G의
스왑메모리가 32G 인 서버를 돌리고있습니다.
오늘 처음으로 동시접속자 300명이 붙었는데 Too Many cursor 가 떴습니다.
동일한 사양으로 운영중인 서버에는 그 이상 동시접속자가 있어도 위와 같은 에러가 안나타는데요
뭐가 문제가 있을까요?
my.cnf 파일에
max_conncection 값은 4096으로 주었고,
wait_timeout 시간을 30으로 주었습니다.
show variables; 를 해보면 내용은 다음과 같을때,
변경해줘야할 값이 또 있을까요??
인터넷을 뒤져보니,
cache값도 뭔가 변경시켜줘야 할것 같고,
buffer_size 도 늘리라고 그러고....
내일은 500명 이상
최대 1000명 정도 동시접속이 생길수도 있을거 같은데
피가 말라 죽겠습니다.
염치불구하지만, 한번만 봐주시면 안될까요? ㅠㅠ
| Variable_name | Value |
+-----------------------------------------+-------------------------------------------------------------------------------------------+
| auto_increment_increment | 1 |
| auto_increment_offset | 1 |
| autocommit | ON |
| automatic_sp_privileges | ON |
| back_log | 50 |
| basedir | /usr/local/mysql-5.1.46/ |
| big_tables | OFF |
| binlog_cache_size | 32768 |
| binlog_direct_non_transactional_updates | OFF |
| binlog_format | MIXED |
| bulk_insert_buffer_size | 8388608 |
| character_set_client | euckr |
| character_set_connection | euckr |
| character_set_database | euckr |
| character_set_filesystem | binary |
| character_set_results | euckr |
| character_set_server | euckr |
| character_set_system | utf8 |
| character_sets_dir | /usr/local/mysql-5.1.46/share/mysql/charsets/ |
| collation_connection | euckr_korean_ci |
| collation_database | euckr_korean_ci |
| collation_server | euckr_korean_ci |
| completion_type | 0 |
| concurrent_insert | 1 |
| connect_timeout | 10 |
| datadir | /var/lib/mysql/ |
| date_format | %Y-%m-%d |
| datetime_format | %Y-%m-%d %H:%i:%s |
| default_week_format | 0 |
| delay_key_write | ON |
| delayed_insert_limit | 100 |
| delayed_insert_timeout | 300 |
| delayed_queue_size | 1000 |
| div_precision_increment | 4 |
| engine_condition_pushdown | ON |
| error_count | 0 |
| event_scheduler | OFF |
| expire_logs_days | 0 |
| flush | OFF |
| flush_time | 0 |
| foreign_key_checks | ON |
| ft_boolean_syntax | + -><()~*:""&| |
| ft_max_word_len | 84 |
| ft_min_word_len | 4 |
| ft_query_expansion_limit | 20 |
| ft_stopword_file | (built-in) |
| general_log | OFF |
| general_log_file | /var/lib/mysql/localhost.log |
| group_concat_max_len | 1024 |
| have_community_features | YES |
| have_compress | YES |
| have_crypt | YES |
| have_csv | YES |
| have_dynamic_loading | YES |
| have_geometry | YES |
| have_innodb | NO |
| have_ndbcluster | NO |
| have_openssl | NO |
| have_partitioning | NO |
| have_query_cache | YES |
| have_rtree_keys | YES |
| have_ssl | NO |
| have_symlink | YES |
| hostname | localhost.localdomain |
| identity | 0 |
| ignore_builtin_innodb | OFF |
| init_connect | SET NAMES euckr |
| init_file | |
| init_slave | |
| insert_id | 0 |
| interactive_timeout | 28800 |
| join_buffer_size | 131072 |
| keep_files_on_create | OFF |
| key_buffer_size | 268435456 |
| key_cache_age_threshold | 300 |
| key_cache_block_size | 1024 |
| key_cache_division_limit | 100 |
| language | /usr/local/mysql-5.1.46/share/mysql/english/ |
| large_files_support | ON |
| large_page_size | 0 |
| large_pages | OFF |
| last_insert_id | 0 |
| lc_time_names | en_US |
| license | GPL |
| local_infile | ON |
| locked_in_memory | OFF |
| log | OFF |
| log_bin | ON |
| log_bin_trust_function_creators | OFF |
| log_bin_trust_routine_creators | OFF |
| log_error | /var/lib/mysql/localhost.localdomain.err |
| log_output | FILE |
| log_queries_not_using_indexes | OFF |
| log_slave_updates | OFF |
| log_slow_queries | ON |
| log_warnings | 1 |
| long_query_time | 3.000000 |
| low_priority_updates | OFF |
| lower_case_file_system | OFF |
| lower_case_table_names | 0 |
| max_allowed_packet | 1048576 |
| max_binlog_cache_size | 18446744073709547520 |
| max_binlog_size | 1073741824 |
| max_connect_errors | 10 |
| max_connections | 4096 |
| max_delayed_threads | 20 |
| max_error_count | 64 |
| max_heap_table_size | 16777216 |
| max_insert_delayed_threads | 20 |
| max_join_size | 18446744073709551615 |
| max_length_for_sort_data | 1024 |
| max_prepared_stmt_count | 16382 |
| max_relay_log_size | 0 |
| max_seeks_for_key | 18446744073709551615 |
| max_sort_length | 1024 |
| max_sp_recursion_depth | 0 |
| max_tmp_tables | 32 |
| max_user_connections | 0 |
| max_write_lock_count | 18446744073709551615 |
| min_examined_row_limit | 0 |
| multi_range_count | 256 |
| myisam_data_pointer_size | 6 |
| myisam_max_sort_file_size | 9223372036853727232 |
| myisam_mmap_size | 18446744073709551615 |
| myisam_recover_options | OFF |
| myisam_repair_threads | 1 |
| myisam_sort_buffer_size | 16777216 |
| myisam_stats_method | nulls_unequal |
| myisam_use_mmap | OFF |
| net_buffer_length | 8192 |
| net_read_timeout | 30 |
| net_retry_count | 10 |
| net_write_timeout | 60 |
| new | OFF |
| old | OFF |
| old_alter_table | OFF |
| old_passwords | OFF |
| open_files_limit | 20480 |
| optimizer_prune_level | 1 |
| optimizer_search_depth | 62 |
| optimizer_switch | index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on |
| pid_file | /var/lib/mysql/localhost.localdomain.pid |
| plugin_dir | /usr/local/mysql-5.1.46/lib/mysql/plugin |
| port | 3306 |
| preload_buffer_size | 32768 |
| profiling | OFF |
| profiling_history_size | 15 |
| protocol_version | 10 |
| pseudo_thread_id | 176 |
| query_alloc_block_size | 8192 |
| query_cache_limit | 1048576 |
| query_cache_min_res_unit | 4096 |
| query_cache_size | 0 |
| query_cache_type | ON |
| query_cache_wlock_invalidate | OFF |
| query_prealloc_size | 8192 |
| rand_seed1 | |
| rand_seed2 | |
| range_alloc_block_size | 4096 |
| read_buffer_size | 2097152 |
| read_only | OFF |
| read_rnd_buffer_size | 8388608 |
| relay_log | |
| relay_log_index | |
| relay_log_info_file | relay-log.info |
| relay_log_purge | ON |
| relay_log_space_limit | 0 |
| report_host | |
| report_password | |
| report_port | 3306 |
| report_user | |
| rpl_recovery_rank | 0 |
| secure_auth | OFF |
| secure_file_priv | |
| server_id | 1 |
| skip_external_locking | ON |
| skip_name_resolve | ON |
| skip_networking | OFF |
| skip_show_database | OFF |
| slave_compressed_protocol | OFF |
| slave_exec_mode | STRICT |
| slave_load_tmpdir | /tmp |
| slave_net_timeout | 3600 |
| slave_skip_errors | OFF |
| slave_transaction_retries | 10 |
| slow_launch_time | 2 |
| slow_query_log | ON |
| slow_query_log_file | /var/lib/mysql/long_query_log |
| socket | /tmp/mysql.sock |
| sort_buffer_size | 2097152 |
| sql_auto_is_null | ON |
| sql_big_selects | ON |
| sql_big_tables | OFF |
| sql_buffer_result | OFF |
| sql_log_bin | ON |
| sql_log_off | OFF |
| sql_log_update | ON |
| sql_low_priority_updates | OFF |
| sql_max_join_size | 18446744073709551615 |
| sql_mode | |
| sql_notes | ON |
| sql_quote_show_create | ON |
| sql_safe_updates | OFF |
| sql_select_limit | 18446744073709551615 |
| sql_slave_skip_counter | |
| sql_warnings | OFF |
| ssl_ca | |
| ssl_capath | |
| ssl_cert | |
| ssl_cipher | |
| ssl_key | |
| storage_engine | MyISAM |
| sync_binlog | 0 |
| sync_frm | ON |
| system_time_zone | KST |
| table_definition_cache | 256 |
| table_lock_wait_timeout | 50 |
| table_open_cache | 512 |
| table_type | MyISAM |
| thread_cache_size | 0 |
| thread_handling | one-thread-per-connection |
| thread_stack | 262144 |
| time_format | %H:%i:%s |
| time_zone | SYSTEM |
| timed_mutexes | OFF |
| timestamp | 1511850914 |
| tmp_table_size | 16777216 |
| tmpdir | /tmp |
| transaction_alloc_block_size | 8192 |
| transaction_prealloc_size | 4096 |
| tx_isolation | REPEATABLE-READ |
| unique_checks | ON |
| updatable_views_with_limit | YES |
| version | 5.1.46-log |
| version_comment | Source distribution |
| version_compile_machine | x86_64 |
| version_compile_os | unknown-linux-gnu |
| wait_timeout | 28800 |
| warning_count | 0 |
+-----------------------------------------+-------------------------------------------------------------------------------------------+
마지막으로 show status like '%connect%'; 를 입력하면
Connections의 수치가 계속해서 올라가는데 이것은 이상이 없는거가요?
mysql> show status like '%connect%';
+----------------------+--------+
| Variable_name | Value |
+----------------------+--------+
| Aborted_connects | 195 |
| Connections | 193531 |
| Max_used_connections | 11 |
| Threads_connected | 1 |
+----------------------+--------+
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