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High memory usage on mysql 5.7.18 running on ubuntu server 16.04
Posted by: Peter Bukaowski
Date: June 15, 2017 01:40AM

Hello

I om observing high memory and swap usage on mysql 5.7.18 on ubuntu server 16.04 (64 bits). The server is not heavy loaded with not many connections. I have 4 databases , one for Drupal and 3 custom ones around 1GB each.
I tried to adjust various of settings to reduce memory usage nothing seems to work.
Any ideas/suggestion what can I tune more to reduce memory usage ?.

/Peter


free and top output:

free -m
total used free shared buff/cache available
Mem: 2000 1356 214 34 429 409
Swap: 1023 1004 19


top - 13:58:32 up 106 days, 19:20, 1 user, load average: 0.02, 0.02, 0.05
Tasks: 149 total, 1 running, 148 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.5 sy, 0.0 ni, 99.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.2 st
KiB Mem : 2048252 total, 214168 free, 1393500 used, 440584 buff/cache
KiB Swap: 1048572 total, 19916 free, 1028656 used. 414928 avail Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10729 mysql 20 0 2446084 997.6m 672 S 0.3 49.9 267:33.48 mysqld


mysql status:

Aborted_clients 1
Aborted_connects 3
Binlog_cache_disk_use 0
Binlog_cache_use 0
Binlog_stmt_cache_disk_use 0
Binlog_stmt_cache_use 0
Bytes_received 10680987423
Bytes_sent 203795761711
Com_admin_commands 957
Com_assign_to_keycache 0
Com_alter_db 0
Com_alter_db_upgrade 0
Com_alter_event 0
Com_alter_function 0
Com_alter_instance 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 519
Com_binlog 0
Com_call_procedure 0
Com_change_db 30813
Com_change_master 0
Com_change_repl_filter 0
Com_check 0
Com_checksum 0
Com_commit 518
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 58891
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_explain_other 0
Com_flush 13
Com_get_diagnostics 0
Com_grant 0
Com_ha_close 0
Com_ha_open 0
Com_ha_read 0
Com_help 0
Com_insert 764993
Com_insert_select 0
Com_install_plugin 0
Com_kill 0
Com_load 0
Com_lock_tables 169
Com_optimize 0
Com_preload_keys 0
Com_prepare_sql 0
Com_purge 0
Com_purge_before_date 0
Com_release_savepoint 1373
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 1
Com_rollback_to_savepoint 0
Com_savepoint 1373
Com_select 4924974
Com_set_option 472115
Com_signal 0
Com_show_binlog_events 0
Com_show_binlogs 0
Com_show_charsets 1
Com_show_collations 1
Com_show_create_db 0
Com_show_create_event 0
Com_show_create_func 0
Com_show_create_proc 0
Com_show_create_table 30745
Com_show_create_trigger 0
Com_show_databases 12
Com_show_engine_logs 0
Com_show_engine_mutex 0
Com_show_engine_status 7
Com_show_events 92
Com_show_errors 0
Com_show_fields 60877
Com_show_function_code 0
Com_show_function_status 2
Com_show_grants 0
Com_show_keys 461
Com_show_master_status 0
Com_show_open_tables 0
Com_show_plugins 1
Com_show_privileges 0
Com_show_procedure_code 0
Com_show_procedure_status 2
Com_show_processlist 12
Com_show_profile 0
Com_show_profiles 0
Com_show_relaylog_events 0
Com_show_slave_hosts 0
Com_show_slave_status 1
Com_show_status 6369
Com_show_storage_engines 1
Com_show_table_status 30747
Com_show_tables 100
Com_show_triggers 30720
Com_show_variables 6506
Com_show_warnings 0
Com_show_create_user 0
Com_shutdown 0
Com_slave_start 0
Com_slave_stop 0
Com_group_replication_start 0
Com_group_replication_stop 0
Com_stmt_execute 0
Com_stmt_close 0
Com_stmt_fetch 0
Com_stmt_prepare 0
Com_stmt_reset 0
Com_stmt_send_long_data 0
Com_truncate 294
Com_uninstall_plugin 0
Com_unlock_tables 91
Com_update 15087
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
Com_stmt_reprepare 0
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 159941
Created_tmp_disk_tables 140860
Created_tmp_files 179
Created_tmp_tables 1208051
Delayed_errors 0
Delayed_insert_threads 0
Delayed_writes 0
Flush_commands 1
Handler_commit 5729112
Handler_delete 133583
Handler_discover 0
Handler_external_lock 11827869
Handler_mrr_init 0
Handler_prepare 0
Handler_read_first 158788
Handler_read_key 27999619
Handler_read_last 1016
Handler_read_next 5429729
Handler_read_prev 448503
Handler_read_rnd 552077
Handler_read_rnd_next 88745397
Handler_rollback 36
Handler_savepoint 1366
Handler_savepoint_rollback 0
Handler_update 14672069
Handler_write 18626042
Innodb_buffer_pool_dump_status Dumping of buffer pool not started
Innodb_buffer_pool_load_status Buffer pool(s) load completed at 170601 13:27:09
Innodb_buffer_pool_resize_status
Innodb_buffer_pool_pages_data 7799
Innodb_buffer_pool_bytes_data 127778816
Innodb_buffer_pool_pages_dirty 0
Innodb_buffer_pool_bytes_dirty 0
Innodb_buffer_pool_pages_flushed 4749876
Innodb_buffer_pool_pages_free 256
Innodb_buffer_pool_pages_misc 137
Innodb_buffer_pool_pages_total 8192
Innodb_buffer_pool_read_ahead_rnd 0
Innodb_buffer_pool_read_ahead 259686
Innodb_buffer_pool_read_ahead_evicted 5098
Innodb_buffer_pool_read_requests 889805897
Innodb_buffer_pool_reads 2416923
Innodb_buffer_pool_wait_free 0
Innodb_buffer_pool_write_requests 20663226
Innodb_data_fsyncs 1335628
Innodb_data_pending_fsyncs 0
Innodb_data_pending_reads 0
Innodb_data_pending_writes 0
Innodb_data_read 45221892608
Innodb_data_reads 2762386
Innodb_data_writes 5506977
Innodb_data_written 160628805120
Innodb_dblwr_pages_written 4509178
Innodb_dblwr_writes 199641
Innodb_log_waits 0
Innodb_log_write_requests 17711668
Innodb_log_writes 346996
Innodb_os_log_fsyncs 526378
Innodb_os_log_pending_fsyncs 0
Innodb_os_log_pending_writes 0
Innodb_os_log_written 8836586496
Innodb_page_size 16384
Innodb_pages_created 449196
Innodb_pages_read 2760121
Innodb_pages_written 4749876
Innodb_row_lock_current_waits 0
Innodb_row_lock_time 1175
Innodb_row_lock_time_avg 19
Innodb_row_lock_time_max 1127
Innodb_row_lock_waits 59
Innodb_rows_deleted 133583
Innodb_rows_inserted 16944980
Innodb_rows_read 78997633
Innodb_rows_updated 172241
Innodb_num_open_files 500
Innodb_truncated_status_writes 0
Innodb_available_undo_logs 128
Key_blocks_not_flushed 0
Key_blocks_unused 6698
Key_blocks_used 2
Key_read_requests 6720
Key_reads 842
Key_write_requests 0
Key_writes 0
Locked_connects 0
Max_execution_time_exceeded 0
Max_execution_time_set 0
Max_execution_time_set_failed 0
Max_used_connections 39
Max_used_connections_time 2017-06-07 16:45:45
Not_flushed_delayed_rows 0
Ongoing_anonymous_transaction_count 0
Open_files 0
Open_streams 0
Open_table_definitions 517
Open_tables 500
Opened_files 16332089
Opened_table_definitions 15579248
Opened_tables 15037134
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_index_stat_lost 0
Performance_schema_locker_lost 0
Performance_schema_memory_classes_lost 0
Performance_schema_metadata_lock_lost 0
Performance_schema_mutex_classes_lost 0
Performance_schema_mutex_instances_lost 0
Performance_schema_nested_statement_lost 0
Performance_schema_prepared_statements_lost 0
Performance_schema_program_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_table_lock_stat_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 910
Qcache_free_memory 3001160
Qcache_hits 13572452
Qcache_inserts 4846432
Qcache_lowmem_prunes 1251487
Qcache_not_cached 18093
Qcache_queries_in_cache 2113
Qcache_total_blocks 5302
Queries 20171297
Questions 20170337
Select_full_join 273
Select_full_range_join 0
Select_range 779749
Select_range_check 0
Select_scan 209177
Slave_open_temp_tables 0
Slow_launch_threads 3
Slow_queries 0
Sort_merge_passes 100
Sort_range 544100
Sort_rows 4211985
Sort_scan 50093
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 Feb 3 15:34:28 2117 GMT
Ssl_server_not_before Feb 27 15:34:28 2017 GMT
Ssl_session_cache_hits 0
Ssl_session_cache_misses 0
Ssl_session_cache_mode Unknown
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 65630
Table_locks_waited 0
Table_open_cache_hits 6721673
Table_open_cache_misses 15037134
Table_open_cache_overflows 15036399
Tc_log_max_pages_used 0
Tc_log_page_size 0
Tc_log_page_waits 0
Threads_cached 7
Threads_connected 1
Threads_created 71
Threads_running 1
Uptime 1124536
Uptime_since_flush_status 1124536


and mysql global variables:


auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
avoid_temporal_upgrade OFF
back_log 80
basedir /usr/
big_tables OFF
bind_address 127.0.0.1
binlog_cache_size 32768
binlog_checksum CRC32
binlog_direct_non_transactional_updates OFF
binlog_error_action ABORT_SERVER
binlog_format ROW
binlog_group_commit_sync_delay 0
binlog_group_commit_sync_no_delay_count 0
binlog_gtid_simple_recovery ON
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
block_encryption_mode aes-128-ecb
bulk_insert_buffer_size 8388608
character_set_client latin1
character_set_connection latin1
character_set_database latin1
character_set_filesystem binary
character_set_results latin1
character_set_server latin1
character_set_system utf8
character_sets_dir /usr/share/mysql/charsets/
check_proxy_users OFF
collation_connection latin1_swedish_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 /mnt/persist/mysql/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_authentication_plugin mysql_native_password
default_password_lifetime 0
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
disabled_storage_engines
disconnect_on_expired_password ON
div_precision_increment 4
end_markers_in_json OFF
enforce_gtid_consistency OFF
eq_range_index_dive_limit 200
event_scheduler OFF
expire_logs_days 10
explicit_defaults_for_timestamp OFF
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 /mnt/persist/mysql/box.log
group_concat_max_len 1024
gtid_executed
gtid_executed_compression_period 1000
gtid_mode OFF
gtid_owned
gtid_purged
have_compress YES
have_crypt YES
have_dynamic_loading YES
have_geometry YES
have_openssl YES
have_profiling YES
have_query_cache YES
have_rtree_keys YES
have_ssl YES
have_statement_timeout YES
have_symlink YES
host_cache_size 279
hostname box
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_hash_index_parts 8
innodb_adaptive_max_sleep_delay 150000
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_chunk_size 134217728
innodb_buffer_pool_dump_at_shutdown ON
innodb_buffer_pool_dump_now OFF
innodb_buffer_pool_dump_pct 25
innodb_buffer_pool_filename ib_buffer_pool
innodb_buffer_pool_instances 1
innodb_buffer_pool_load_abort OFF
innodb_buffer_pool_load_at_startup ON
innodb_buffer_pool_load_now OFF
innodb_buffer_pool_size 134217728
innodb_change_buffer_max_size 25
innodb_change_buffering all
innodb_checksum_algorithm crc32
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_deadlock_detect ON
innodb_default_row_format dynamic
innodb_disable_sort_file_cache OFF
innodb_doublewrite ON
innodb_fast_shutdown 1
innodb_file_format Barracuda
innodb_file_format_check ON
innodb_file_format_max Barracuda
innodb_file_per_table ON
innodb_fill_factor 100
innodb_flush_log_at_timeout 1
innodb_flush_log_at_trx_commit 0
innodb_flush_method
innodb_flush_neighbors 1
innodb_flush_sync ON
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 ON
innodb_lock_wait_timeout 50
innodb_locks_unsafe_for_binlog OFF
innodb_log_buffer_size 16777216
innodb_log_checksums ON
innodb_log_compressed_pages ON
innodb_log_file_size 50331648
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_log_write_ahead_size 8192
innodb_lru_scan_depth 256
innodb_max_dirty_pages_pct 75.000000
innodb_max_dirty_pages_pct_lwm 0.000000
innodb_max_purge_lag 0
innodb_max_purge_lag_delay 0
innodb_max_undo_log_size 1073741824
innodb_monitor_disable
innodb_monitor_enable
innodb_monitor_reset
innodb_monitor_reset_all
innodb_numa_interleave OFF
innodb_old_blocks_pct 37
innodb_old_blocks_time 1000
innodb_online_alter_log_max_size 134217728
innodb_open_files 500
innodb_optimize_fulltext_only OFF
innodb_page_cleaners 1
innodb_page_size 16384
innodb_print_all_deadlocks OFF
innodb_purge_batch_size 300
innodb_purge_rseg_truncate_frequency 128
innodb_purge_threads 4
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 ON
innodb_support_xa ON
innodb_sync_array_size 1
innodb_sync_spin_loops 30
innodb_table_locks ON
innodb_temp_data_file_path ibtmp1:12M:autoextend
innodb_thread_concurrency 0
innodb_thread_sleep_delay 10000
innodb_tmpdir
innodb_undo_directory ./
innodb_undo_log_truncate OFF
innodb_undo_logs 128
innodb_undo_tablespaces 0
innodb_use_native_aio ON
innodb_version 5.7.18
innodb_write_io_threads 4
interactive_timeout 28800
internal_tmp_disk_storage_engine InnoDB
join_buffer_size 262144
keep_files_on_create OFF
key_buffer_size 8388608
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
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_builtin_as_identified_by_password OFF
log_error /var/log/mysql/error.log
log_error_verbosity 3
log_output FILE
log_queries_not_using_indexes OFF
log_slave_updates OFF
log_slow_admin_statements OFF
log_slow_slave_statements OFF
log_statements_unsafe_for_binlog ON
log_syslog OFF
log_syslog_facility daemon
log_syslog_include_pid ON
log_syslog_tag
log_throttle_queries_not_using_indexes 0
log_timestamps UTC
log_warnings 2
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 16777216
max_binlog_cache_size 18446744073709547520
max_binlog_size 104857600
max_binlog_stmt_cache_size 18446744073709547520
max_connect_errors 100
max_connections 100
max_delayed_threads 20
max_digest_length 1024
max_error_count 64
max_execution_time 0
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 1024
max_points_in_geometry 65536
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 BACKUP
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
mysql_native_password_proxy_users OFF
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
ngram_token_size 2
offline_mode OFF
old OFF
old_alter_table OFF
old_passwords 0
open_files_limit 65536
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,duplicateweedout=on,subquery_materialization_cost_based=on,use_index_extensions=on,condition_fanout_filter=on,derived_merge=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
parser_max_mem_size 18446744073709551615
performance_schema OFF
performance_schema_accounts_size 0
performance_schema_digests_size 0
performance_schema_events_stages_history_long_size 0
performance_schema_events_stages_history_size 0
performance_schema_events_statements_history_long_size 0
performance_schema_events_statements_history_size 0
performance_schema_events_transactions_history_long_size 0
performance_schema_events_transactions_history_size 0
performance_schema_events_waits_history_long_size 0
performance_schema_events_waits_history_size 0
performance_schema_hosts_size 0
performance_schema_max_cond_classes 0
performance_schema_max_cond_instances 0
performance_schema_max_digest_length 0
performance_schema_max_file_classes 0
performance_schema_max_file_handles 0
performance_schema_max_file_instances 0
performance_schema_max_index_stat 0
performance_schema_max_memory_classes 0
performance_schema_max_metadata_locks 0
performance_schema_max_mutex_classes 0
performance_schema_max_mutex_instances 0
performance_schema_max_prepared_statements_instances 0
performance_schema_max_program_instances 0
performance_schema_max_rwlock_classes 0
performance_schema_max_rwlock_instances 0
performance_schema_max_socket_classes 0
performance_schema_max_socket_instances 0
performance_schema_max_sql_text_length 0
performance_schema_max_stage_classes 0
performance_schema_max_statement_classes 0
performance_schema_max_statement_stack 0
performance_schema_max_table_handles 0
performance_schema_max_table_instances 0
performance_schema_max_table_lock_stat 0
performance_schema_max_thread_classes 0
performance_schema_max_thread_instances 0
performance_schema_session_connect_attrs_size 0
performance_schema_setup_actors_size 0
performance_schema_setup_objects_size 0
performance_schema_users_size 0
pid_file /var/run/mysqld/mysqld.pid
plugin_dir /usr/lib/mysql/plugin/
port 3306
preload_buffer_size 32768
profiling OFF
profiling_history_size 15
protocol_version 10
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_min_res_unit 4096
query_cache_size 8388608
query_cache_type ON
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
range_alloc_block_size 4096
range_optimizer_max_mem_size 8388608
rbr_exec_mode STRICT
read_buffer_size 65536
read_only OFF
read_rnd_buffer_size 262144
relay_log
relay_log_basename /mnt/persist/mysql/box-relay-bin
relay_log_index /mnt/persist/mysql/box-relay-bin.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
require_secure_transport OFF
rpl_stop_slave_timeout 31536000
secure_auth ON
secure_file_priv /var/lib/mysql-files/
server_id 0
server_id_bits 32
server_uuid c0133f44-fd0d-11e6-954f-f23c91e5fbf5
session_track_gtids OFF
session_track_schema ON
session_track_state_change OFF
session_track_system_variables time_zone,autocommit,character_set_client,character_set_results,character_set_connection
session_track_transaction_info OFF
sha256_password_proxy_users OFF
show_compatibility_56 OFF
show_old_temporals 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 60
slave_parallel_type DATABASE
slave_parallel_workers 0
slave_pending_jobs_size_max 16777216
slave_preserve_commit_order OFF
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 OFF
slow_query_log_file /var/log/mysql/mysql-slow.log
socket /var/run/mysqld/mysqld.sock
sort_buffer_size 262144
sql_auto_is_null OFF
sql_big_selects ON
sql_buffer_result OFF
sql_log_off OFF
sql_mode ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,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 /etc/mysql/company/cert.crt
ssl_cipher
ssl_crl
ssl_crlpath
ssl_key /etc/mysql/company/cert.key
stored_program_cache 256
super_read_only OFF
sync_binlog 1
sync_frm ON
sync_master_info 10000
sync_relay_log 10000
sync_relay_log_info 10000
system_time_zone CEST
table_definition_cache 500
table_open_cache 500
table_open_cache_instances 1
thread_cache_size 8
thread_handling one-thread-per-connection
thread_stack 196608
time_format %H:%i:%s
time_zone SYSTEM
tls_version TLSv1,TLSv1.1
tmp_table_size 16777216
tmpdir /tmp
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
transaction_write_set_extraction OFF
tx_isolation REPEATABLE-READ
tx_read_only OFF
unique_checks ON
updatable_views_with_limit YES
version 5.7.18-0ubuntu0.16.04.1
version_comment (Ubuntu)
version_compile_machine x86_64
version_compile_os Linux
wait_timeout 28800

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High memory usage on mysql 5.7.18 running on ubuntu server 16.04
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June 15, 2017 01:40AM


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