高流量减慢网站8Gb内存服务器- my.cnf配置

Question

昨天我们配置了服务器的my.cnf。今天我们的网站流量很大。网站的速度随着流量的增加而变慢，有时也会停工。我们之前已经从MyISAM存储引擎切换到了InnoDB。以下是我们的my.cnf的详细信息。

[mysqld]
default-storage-engine=InnoDB
query_cache_type=1
innodb_buffer_pool_size=868M
innodb_buffer_pool_instances=1
performance-schema=0
key_buffer_size=2M
max_connections=2000
slow_query_log= ON
innodb_file_per_table
innodb_open_files=1000
innodb_fast_shutdown=0
query_cache_size =50M

在重新启动服务器之前，我们有400 We的内存。

下面是在SSH中使用top与600+用户在重新启动之后的结果。

服务器有可用的4Gb内存。不过，这个网站还是很慢。

在配置my.cnf时，我们有什么需要考虑的吗？

更新：SHOW GLOBAL STATUS

Aborted_clients 19
Aborted_connects    784
Binlog_cache_disk_use   0
Binlog_cache_use    0
Binlog_stmt_cache_disk_use  0
Binlog_stmt_cache_use   0
Bytes_received  281808990
Bytes_sent  3828623531
Com_admin_commands  12
Com_assign_to_keycache  0
Com_alter_db    0
Com_alter_db_upgrade    0
Com_alter_event 0
Com_alter_function  0
Com_alter_procedure 0
Com_alter_server    0
Com_alter_table 0
Com_alter_tablespace    0
Com_alter_user  0
Com_analyze 0
Com_begin   0
Com_binlog  0
Com_call_procedure  0
Com_change_db   214618
Com_change_master   0
Com_check   28
Com_checksum    0
Com_commit  0
Com_create_db   0
Com_create_event    0
Com_create_function 0
Com_create_index    0
Com_create_procedure    0
Com_create_server   0
Com_create_table    0
Com_create_trigger  0
Com_create_udf  0
Com_create_user 0
Com_create_view 0
Com_dealloc_sql 0
Com_delete  174
Com_delete_multi    0
Com_do  0
Com_drop_db 0
Com_drop_event  0
Com_drop_function   0
Com_drop_index  0
Com_drop_procedure  0
Com_drop_server 0
Com_drop_table  0
Com_drop_trigger    0
Com_drop_user   0
Com_drop_view   0
Com_empty_query 0
Com_execute_sql 0
Com_flush   0
Com_get_diagnostics 0
Com_grant   0
Com_ha_close    0
Com_ha_open 0
Com_ha_read 0
Com_help    0
Com_insert  7736
Com_insert_select   0
Com_install_plugin  0
Com_kill    0
Com_load    0
Com_lock_tables 0
Com_optimize    0
Com_preload_keys    0
Com_prepare_sql 0
Com_purge   0
Com_purge_before_date   0
Com_release_savepoint   0
Com_rename_table    0
Com_rename_user 0
Com_repair  0
Com_replace 0
Com_replace_select  0
Com_reset   0
Com_resignal    0
Com_revoke  0
Com_revoke_all  0
Com_rollback    0
Com_rollback_to_savepoint   0
Com_savepoint   0
Com_select  523567
Com_set_option  175679
Com_signal  0
Com_show_binlog_events  0
Com_show_binlogs    0
Com_show_charsets   0
Com_show_collations 0
Com_show_create_db  0
Com_show_create_event   0
Com_show_create_func    0
Com_show_create_proc    0
Com_show_create_table   111
Com_show_create_trigger 0
Com_show_databases  6
Com_show_engine_logs    0
Com_show_engine_mutex   0
Com_show_engine_status  2
Com_show_events 0
Com_show_errors 0
Com_show_fields 35
Com_show_function_code  0
Com_show_function_status    3
Com_show_grants 2
Com_show_keys   27
Com_show_master_status  0
Com_show_open_tables    0
Com_show_plugins    0
Com_show_privileges 0
Com_show_procedure_code 0
Com_show_procedure_status   3
Com_show_processlist    345
Com_show_profile    0
Com_show_profiles   0
Com_show_relaylog_events    0
Com_show_slave_hosts    0
Com_show_slave_status   0
Com_show_status 285
Com_show_storage_engines    3
Com_show_table_status   30
Com_show_tables 12
Com_show_triggers   0
Com_show_variables  12
Com_show_warnings   0
Com_slave_start 0
Com_slave_stop  0
Com_stmt_close  0
Com_stmt_execute    0
Com_stmt_fetch  0
Com_stmt_prepare    0
Com_stmt_reprepare  0
Com_stmt_reset  0
Com_stmt_send_long_data 0
Com_truncate    0
Com_uninstall_plugin    0
Com_unlock_tables   0
Com_update  104639
Com_update_multi    0
Com_xa_commit   0
Com_xa_end  0
Com_xa_prepare  0
Com_xa_recover  0
Com_xa_rollback 0
Com_xa_start    0
Compression OFF
Connection_errors_accept    0
Connection_errors_internal  0
Connection_errors_max_connections   0
Connection_errors_peer_address  0
Connection_errors_select    0
Connection_errors_tcpwrap   0
Connections 216533
Created_tmp_disk_tables 8814
Created_tmp_files   39
Created_tmp_tables  28116
Delayed_errors  0
Delayed_insert_threads  0
Delayed_writes  0
Flush_commands  1
Handler_commit  592369
Handler_delete  173
Handler_discover    0
Handler_external_lock   1352192
Handler_mrr_init    0
Handler_prepare 0
Handler_read_first  9154
Handler_read_key    50340776
Handler_read_last   1262
Handler_read_next   535162039
Handler_read_prev   21301756
Handler_read_rnd    15634807
Handler_read_rnd_next   709087992
Handler_rollback    1
Handler_savepoint   0
Handler_savepoint_rollback  0
Handler_update  119993
Handler_write   30752233
Innodb_buffer_pool_dump_status  not started
Innodb_buffer_pool_load_status  not started
Innodb_buffer_pool_pages_data   46719
Innodb_buffer_pool_bytes_data   765444096
Innodb_buffer_pool_pages_dirty  36
Innodb_buffer_pool_bytes_dirty  589824
Innodb_buffer_pool_pages_flushed    365086
Innodb_buffer_pool_pages_free   78123
Innodb_buffer_pool_pages_misc   3157
Innodb_buffer_pool_pages_total  127999
Innodb_buffer_pool_read_ahead_rnd   0
Innodb_buffer_pool_read_ahead   7874
Innodb_buffer_pool_read_ahead_evicted   0
Innodb_buffer_pool_read_requests    1326800871
Innodb_buffer_pool_reads    37552
Innodb_buffer_pool_wait_free    0
Innodb_buffer_pool_write_requests   1056322
Innodb_data_fsyncs  179862
Innodb_data_pending_fsyncs  0
Innodb_data_pending_reads   0
Innodb_data_pending_writes  0
Innodb_data_read    754421760
Innodb_data_reads   46083
Innodb_data_writes  514361
Innodb_data_written 12084665856
Innodb_dblwr_pages_written  365086
Innodb_dblwr_writes 12008
Innodb_have_atomic_builtins ON
Innodb_log_waits    0
Innodb_log_write_requests   115719
Innodb_log_writes   124576
Innodb_os_log_fsyncs    135947
Innodb_os_log_pending_fsyncs    0
Innodb_os_log_pending_writes    0
Innodb_os_log_written   115743232
Innodb_page_size    16384
Innodb_pages_created    678
Innodb_pages_read   46041
Innodb_pages_written    365086
Innodb_row_lock_current_waits   0
Innodb_row_lock_time    0
Innodb_row_lock_time_avg    0
Innodb_row_lock_time_max    0
Innodb_row_lock_waits   0
Innodb_rows_deleted 173
Innodb_rows_inserted    7726
Innodb_rows_read    1260491510
Innodb_rows_updated 104897
Innodb_num_open_files   34
Innodb_truncated_status_writes  0
Innodb_available_undo_logs  128
Key_blocks_not_flushed  0
Key_blocks_unused   1612
Key_blocks_used 1674
Key_read_requests   85604696
Key_reads   44517
Key_write_requests  31877162
Key_writes  198650
Last_query_cost 0.000000
Last_query_partial_plans    0
Max_used_connections    19
Not_flushed_delayed_rows    0
Open_files  1100
Open_streams    0
Open_table_definitions  622
Open_tables 657
Opened_files    37448
Opened_table_definitions    622
Opened_tables   664
Performance_schema_accounts_lost    0
Performance_schema_cond_classes_lost    0
Performance_schema_cond_instances_lost  0
Performance_schema_digest_lost  0
Performance_schema_file_classes_lost    0
Performance_schema_file_handles_lost    0
Performance_schema_file_instances_lost  0
Performance_schema_hosts_lost   0
Performance_schema_locker_lost  0
Performance_schema_mutex_classes_lost   0
Performance_schema_mutex_instances_lost 0
Performance_schema_rwlock_classes_lost  0
Performance_schema_rwlock_instances_lost    0
Performance_schema_session_connect_attrs_lost   0
Performance_schema_socket_classes_lost  0
Performance_schema_socket_instances_lost    0
Performance_schema_stage_classes_lost   0
Performance_schema_statement_classes_lost   0
Performance_schema_table_handles_lost   0
Performance_schema_table_instances_lost 0
Performance_schema_thread_classes_lost  0
Performance_schema_thread_instances_lost    0
Performance_schema_users_lost   0
Prepared_stmt_count 0
Qcache_free_blocks  5581
Qcache_free_memory  18170232
Qcache_hits 855928
Qcache_inserts  431128
Qcache_lowmem_prunes    59940
Qcache_not_cached   92231
Qcache_queries_in_cache 12983
Qcache_total_blocks 32769
Queries 2099071
Questions   2098784
Select_full_join    0
Select_full_range_join  0
Select_range    6046
Select_range_check  0
Select_scan 13707
Slave_heartbeat_period  
Slave_last_heartbeat    
Slave_open_temp_tables  0
Slave_received_heartbeats   
Slave_retried_transactions  
Slave_running   OFF
Slow_launch_threads 0
Slow_queries    7
Sort_merge_passes   64
Sort_range  102701
Sort_rows   5793368
Sort_scan   24887
Ssl_accept_renegotiates 0
Ssl_accepts 0
Ssl_callback_cache_hits 0
Ssl_cipher  
Ssl_cipher_list 
Ssl_client_connects 0
Ssl_connect_renegotiates    0
Ssl_ctx_verify_depth    0
Ssl_ctx_verify_mode 0
Ssl_default_timeout 0
Ssl_finished_accepts    0
Ssl_finished_connects   0
Ssl_server_not_after    
Ssl_server_not_before   
Ssl_session_cache_hits  0
Ssl_session_cache_misses    0
Ssl_session_cache_mode  NONE
Ssl_session_cache_overflows 0
Ssl_session_cache_size  0
Ssl_session_cache_timeouts  0
Ssl_sessions_reused 0
Ssl_used_session_cache_entries  0
Ssl_verify_depth    0
Ssl_verify_mode 0
Ssl_version 
Table_locks_immediate   663374
Table_locks_waited  0
Table_open_cache_hits   667069
Table_open_cache_misses 664
Table_open_cache_overflows  0
Tc_log_max_pages_used   0
Tc_log_page_size    0
Tc_log_page_waits   0
Threads_cached  13
Threads_connected   6
Threads_created 19
Threads_running 1
Uptime  82693
Uptime_since_flush_status   82693

SHOW VARIABLES;

auto_increment_increment    1
auto_increment_offset   1
autocommit  ON
automatic_sp_privileges ON
avoid_temporal_upgrade  OFF
back_log    450
basedir /usr/
big_tables  OFF
bind_address    *
binlog_cache_size   32768
binlog_checksum CRC32
binlog_direct_non_transactional_updates OFF
binlog_error_action IGNORE_ERROR
binlog_format   STATEMENT
binlog_gtid_simple_recovery OFF
binlog_max_flush_queue_time 0
binlog_order_commits    ON
binlog_row_image    FULL
binlog_rows_query_log_events    OFF
binlog_stmt_cache_size  32768
binlogging_impossible_mode  IGNORE_ERROR
block_encryption_mode   aes-128-ecb
bulk_insert_buffer_size 8388608
character_set_client    utf8
character_set_connection    utf8
character_set_database  latin1
character_set_filesystem    binary
character_set_results   utf8
character_set_server    latin1
character_set_system    utf8
character_sets_dir  /usr/share/mysql/charsets/
collation_connection    utf8_general_ci
collation_database  latin1_swedish_ci
collation_server    latin1_swedish_ci
completion_type NO_CHAIN
concurrent_insert   AUTO
connect_timeout 10
core_file   OFF
datadir /var/lib/mysql/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_storage_engine  InnoDB
default_tmp_storage_engine  InnoDB
default_week_format 0
delay_key_write ON
delayed_insert_limit    100
delayed_insert_timeout  300
delayed_queue_size  1000
disconnect_on_expired_password  ON
div_precision_increment 4
end_markers_in_json OFF
enforce_gtid_consistency    OFF
eq_range_index_dive_limit   10
error_count 0
event_scheduler OFF
expire_logs_days    0
explicit_defaults_for_timestamp OFF
external_user   
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/xxx-xxx-xxx.log
group_concat_max_len    1024
gtid_executed   
gtid_mode   OFF
gtid_next   AUTOMATIC
gtid_owned  
gtid_purged 
have_compress   YES
have_crypt  YES
have_dynamic_loading    YES
have_geometry   YES
have_openssl    DISABLED
have_profiling  YES
have_query_cache    YES
have_rtree_keys YES
have_ssl    DISABLED
have_symlink    YES
host_cache_size 703
hostname    xxx-xxx-xxx.secureserver.net
identity    0
ignore_builtin_innodb   OFF
ignore_db_dirs  
init_connect    
init_file   
init_slave  
innodb_adaptive_flushing    ON
innodb_adaptive_flushing_lwm    10
innodb_adaptive_hash_index  ON
innodb_adaptive_max_sleep_delay 150000
innodb_additional_mem_pool_size 8388608
innodb_api_bk_commit_interval   5
innodb_api_disable_rowlock  OFF
innodb_api_enable_binlog    OFF
innodb_api_enable_mdl   OFF
innodb_api_trx_level    0
innodb_autoextend_increment 64
innodb_autoinc_lock_mode    1
innodb_buffer_pool_dump_at_shutdown OFF
innodb_buffer_pool_dump_now OFF
innodb_buffer_pool_filename ib_buffer_pool
innodb_buffer_pool_instances    1
innodb_buffer_pool_load_abort   OFF
innodb_buffer_pool_load_at_startup  OFF
innodb_buffer_pool_load_now OFF
innodb_buffer_pool_size 2097152000
innodb_change_buffer_max_size   25
innodb_change_buffering all
innodb_checksum_algorithm   innodb
innodb_checksums    ON
innodb_cmp_per_index_enabled    OFF
innodb_commit_concurrency   0
innodb_compression_failure_threshold_pct    5
innodb_compression_level    6
innodb_compression_pad_pct_max  50
innodb_concurrency_tickets  5000
innodb_data_file_path   ibdata1:12M:autoextend
innodb_data_home_dir    
innodb_disable_sort_file_cache  OFF
innodb_doublewrite  ON
innodb_fast_shutdown    0
innodb_file_format  Antelope
innodb_file_format_check    ON
innodb_file_format_max  Antelope
innodb_file_per_table   ON
innodb_flush_log_at_timeout 1
innodb_flush_log_at_trx_commit  1
innodb_flush_method 
innodb_flush_neighbors  1
innodb_flushing_avg_loops   30
innodb_force_load_corrupted OFF
innodb_force_recovery   0
innodb_ft_aux_table 
innodb_ft_cache_size    8000000
innodb_ft_enable_diag_print OFF
innodb_ft_enable_stopword   ON
innodb_ft_max_token_size    84
innodb_ft_min_token_size    3
innodb_ft_num_word_optimize 2000
innodb_ft_result_cache_limit    2000000000
innodb_ft_server_stopword_table 
innodb_ft_sort_pll_degree   2
innodb_ft_total_cache_size  640000000
innodb_ft_user_stopword_table   
innodb_io_capacity  200
innodb_io_capacity_max  2000
innodb_large_prefix OFF
innodb_lock_wait_timeout    50
innodb_locks_unsafe_for_binlog  OFF
innodb_log_buffer_size  8388608
innodb_log_compressed_pages ON
innodb_log_file_size    50331648
innodb_log_files_in_group   2
innodb_log_group_home_dir   ./
innodb_lru_scan_depth   1024
innodb_max_dirty_pages_pct  75
innodb_max_dirty_pages_pct_lwm  0
innodb_max_purge_lag    0
innodb_max_purge_lag_delay  0
innodb_mirrored_log_groups  1
innodb_monitor_disable  
innodb_monitor_enable   
innodb_monitor_reset    
innodb_monitor_reset_all    
innodb_old_blocks_pct   37
innodb_old_blocks_time  1000
innodb_online_alter_log_max_size    134217728
innodb_open_files   1000
innodb_optimize_fulltext_only   OFF
innodb_page_size    16384
innodb_print_all_deadlocks  OFF
innodb_purge_batch_size 300
innodb_purge_threads    1
innodb_random_read_ahead    OFF
innodb_read_ahead_threshold 56
innodb_read_io_threads  4
innodb_read_only    OFF
innodb_replication_delay    0
innodb_rollback_on_timeout  OFF
innodb_rollback_segments    128
innodb_sort_buffer_size 1048576
innodb_spin_wait_delay  6
innodb_stats_auto_recalc    ON
innodb_stats_include_delete_marked  OFF
innodb_stats_method nulls_equal
innodb_stats_on_metadata    OFF
innodb_stats_persistent ON
innodb_stats_persistent_sample_pages    20
innodb_stats_sample_pages   8
innodb_stats_transient_sample_pages 8
innodb_status_output    OFF
innodb_status_output_locks  OFF
innodb_strict_mode  OFF
innodb_support_xa   ON
innodb_sync_array_size  1
innodb_sync_spin_loops  30
innodb_table_locks  ON
innodb_thread_concurrency   0
innodb_thread_sleep_delay   10000
innodb_tmpdir   
innodb_undo_directory   .
innodb_undo_logs    128
innodb_undo_tablespaces 0
innodb_use_native_aio   ON
innodb_use_sys_malloc   ON
innodb_version  5.6.41
innodb_write_io_threads 4
insert_id   0
interactive_timeout 28800
join_buffer_size    262144
keep_files_on_create    OFF
key_buffer_size 2097152
key_cache_age_threshold 300
key_cache_block_size    1024
key_cache_division_limit    100
large_files_support ON
large_page_size 0
large_pages OFF
last_insert_id  0
lc_messages en_US
lc_messages_dir /usr/share/mysql/
lc_time_names   en_US
license GPL
local_infile    ON
lock_wait_timeout   31536000
locked_in_memory    OFF
log_bin OFF
log_bin_basename    
log_bin_index   
log_bin_trust_function_creators OFF
log_bin_use_v1_row_events   OFF
log_error   ./xxx-xxx-xxx.secureserver.net.err
log_output  FILE
log_queries_not_using_indexes   OFF
log_slave_updates   OFF
log_slow_admin_statements   OFF
log_slow_slave_statements   OFF
log_throttle_queries_not_using_indexes  0
log_warnings    1
long_query_time 10.000000
low_priority_updates    OFF
lower_case_file_system  OFF
lower_case_table_names  0
master_info_repository  FILE
master_verify_checksum  OFF
max_allowed_packet  4194304
max_binlog_cache_size   18446744073709547520
max_binlog_size 1073741824
max_binlog_stmt_cache_size  18446744073709547520
max_connect_errors  100
max_connections 2000
max_delayed_threads 20
max_digest_length   1024
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
metadata_locks_cache_size   1024
metadata_locks_hash_instances   8
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 8388608
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
net_buffer_length   16384
net_read_timeout    30
net_retry_count 10
net_write_timeout   60
new OFF
old OFF
old_alter_table OFF
old_passwords   0
open_files_limit    10000
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,engine_condition_pushdown=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=on,block_nested_loop=on,batched_key_access=off,materialization=on,semijoin=on,loosescan=on,firstmatch=on,subquery_materialization_cost_based=on,use_index_extensions=on
optimizer_trace enabled=off,one_line=off
optimizer_trace_features    greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on
optimizer_trace_limit   1
optimizer_trace_max_mem_size    16384
optimizer_trace_offset  -1
performance_schema  OFF
performance_schema_accounts_size    -1
performance_schema_digests_size -1
performance_schema_events_stages_history_long_size  -1
performance_schema_events_stages_history_size   -1
performance_schema_events_statements_history_long_size  -1
performance_schema_events_statements_history_size   -1
performance_schema_events_waits_history_long_size   -1
performance_schema_events_waits_history_size    -1
performance_schema_hosts_size   -1
performance_schema_max_cond_classes 80
performance_schema_max_cond_instances   -1
performance_schema_max_digest_length    1024
performance_schema_max_file_classes 50
performance_schema_max_file_handles 32768
performance_schema_max_file_instances   -1
performance_schema_max_mutex_classes    200
performance_schema_max_mutex_instances  -1
performance_schema_max_rwlock_classes   40
performance_schema_max_rwlock_instances -1
performance_schema_max_socket_classes   10
performance_schema_max_socket_instances -1
performance_schema_max_stage_classes    150
performance_schema_max_statement_classes    168
performance_schema_max_table_handles    -1
performance_schema_max_table_instances  -1
performance_schema_max_thread_classes   50
performance_schema_max_thread_instances -1
performance_schema_session_connect_attrs_size   -1
performance_schema_setup_actors_size    100
performance_schema_setup_objects_size   100
performance_schema_users_size   -1
pid_file    /var/lib/mysql/xx-xxx-xxx.secureserver.net.pid
plugin_dir  /usr/lib64/mysql/plugin/
port    3306
preload_buffer_size 32768
profiling   ON
profiling_history_size  15
protocol_version    10
proxy_user  
pseudo_slave_mode   OFF
pseudo_thread_id    216678
query_alloc_block_size  8192
query_cache_limit   1048576
query_cache_min_res_unit    4096
query_cache_size    52428800
query_cache_type    ON
query_cache_wlock_invalidate    OFF
query_prealloc_size 8192
rand_seed1  0
rand_seed2  0
range_alloc_block_size  4096
read_buffer_size    131072
read_only   OFF
read_rnd_buffer_size    262144
relay_log   
relay_log_basename  
relay_log_index 
relay_log_info_file relay-log.info
relay_log_info_repository   FILE
relay_log_purge ON
relay_log_recovery  OFF
relay_log_space_limit   0
report_host 
report_password 
report_port 3306
report_user 
rpl_stop_slave_timeout  31536000
secure_auth ON
secure_file_priv    
server_id   0
server_id_bits  32
server_uuid f4178a-374-11e7-09f-01813919
show_old_temporals  OFF
simplified_binlog_gtid_recovery OFF
skip_external_locking   ON
skip_name_resolve   OFF
skip_networking OFF
skip_show_database  OFF
slave_allow_batching    OFF
slave_checkpoint_group  512
slave_checkpoint_period 300
slave_compressed_protocol   OFF
slave_exec_mode STRICT
slave_load_tmpdir   /tmp
slave_max_allowed_packet    1073741824
slave_net_timeout   3600
slave_parallel_workers  0
slave_pending_jobs_size_max 16777216
slave_rows_search_algorithms    TABLE_SCAN,INDEX_SCAN
slave_skip_errors   OFF
slave_sql_verify_checksum   ON
slave_transaction_retries   10
slave_type_conversions  
slow_launch_time    2
slow_query_log  ON
slow_query_log_file /var/lib/mysql/xxx.xxx.xxx-slow.log
socket  /var/lib/mysql/mysql.sock
sort_buffer_size    262144
sql_auto_is_null    OFF
sql_big_selects ON
sql_buffer_result   OFF
sql_log_bin ON
sql_log_off OFF
sql_mode    NO_ENGINE_SUBSTITUTION
sql_notes   ON
sql_quote_show_create   ON
sql_safe_updates    OFF
sql_select_limit    18446744073709551615
sql_slave_skip_counter  0
sql_warnings    OFF
ssl_ca  
ssl_capath  
ssl_cert    
ssl_cipher  
ssl_crl 
ssl_crlpath 
ssl_key 
storage_engine  InnoDB
stored_program_cache    256
sync_binlog 0
sync_frm    ON
sync_master_info    10000
sync_relay_log  10000
sync_relay_log_info 10000
system_time_zone    +08
table_definition_cache  1400
table_open_cache    2000
table_open_cache_instances  1
thread_cache_size   28
thread_concurrency  10
thread_handling one-thread-per-connection
thread_stack    262144
time_format %H:%i:%s
time_zone   SYSTEM
timed_mutexes   OFF
timestamp   1539659217.500644
tmp_table_size  16777216
tmpdir  /tmp
transaction_alloc_block_size    8192
transaction_allow_batching  OFF
transaction_prealloc_size   4096
tx_isolation    REPEATABLE-READ
tx_read_only    OFF
unique_checks   ON
updatable_views_with_limit  YES
version 5.6.41-log
version_comment MySQL Community Server (GPL)
version_compile_machine x86_64
version_compile_os  Linux
wait_timeout    28800
warning_count   0

Answer 1

您能添加更多的细节，包括您拥有的MySQL版本以及配置的其余部分吗？

我可以看到，您的innodb缓冲池被设置为大约868 is，尽管您总共有8GB内存。如果您只使用innodb，那么总的物理内存的70%-80%是一般的经验法则，但是您可能想要使用大约50%，因为您似乎在同一台机器上有一个php服务器。

此外，您是否在错误日志中看到任何错误？