MySQL - 查看 / 修改配置参数（Global Variables）

修改配置参数采用 set GLOBAL 命令，如：set GLOBAL net_write_timeout=120;在Mysql的配置文件中对参数值进行修改，之后重启数据库服务即可查看配置参数命令：show global variables;如表所示Variable_nameValueactivate_all_roles_on_loginOFFauto_generate_certsONauto_i

放羊的牧码

9970人浏览 · 2021-04-29 20:37:51

放羊的牧码 · 2021-04-29 20:37:51 发布

修改配置参数

采用 set GLOBAL 命令，如：set GLOBAL net_write_timeout=120;
在Mysql的配置文件中对参数值进行修改，之后重启数据库服务即可

查看配置参数

命令：show global variables;
如表所示

Variable_name	Value
activate_all_roles_on_login	OFF
auto_generate_certs	ON
auto_increment_increment	1
auto_increment_offset	1
autocommit	ON
automatic_sp_privileges	ON
avoid_temporal_upgrade	OFF
back_log	80
basedir	C:\Program Files\MySQL\MySQL Server 8.0\
big_tables	OFF
bind_address	*
binlog_cache_size	32768
binlog_checksum	CRC32
binlog_direct_non_transactional_updates	OFF
binlog_error_action	ABORT_SERVER
binlog_expire_logs_seconds	2592000
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_row_metadata	MINIMAL
binlog_row_value_options
binlog_rows_query_log_events	OFF
binlog_stmt_cache_size	32768
binlog_transaction_dependency_history_size	25000
binlog_transaction_dependency_tracking	COMMIT_ORDER
block_encryption_mode	aes-128-ecb
bulk_insert_buffer_size	8388608
caching_sha2_password_auto_generate_rsa_keys	ON
caching_sha2_password_private_key_path	private_key.pem
caching_sha2_password_public_key_path	public_key.pem
character_set_client	utf8mb4
character_set_connection	utf8mb4
character_set_database	utf8mb4
character_set_filesystem	binary
character_set_results	utf8mb4
character_set_server	utf8mb4
character_set_system	utf8
character_sets_dir	C:\Program Files\MySQL\MySQL Server 8.0\share\charsets\
check_proxy_users	OFF
collation_connection	utf8mb4_0900_ai_ci
collation_database	utf8mb4_0900_ai_ci
collation_server	utf8mb4_0900_ai_ci
completion_type	NO_CHAIN
concurrent_insert	AUTO
connect_timeout	10
core_file	OFF
cte_max_recursion_depth	1000
datadir	D:\ProgramData\MySQL\MySQL Server 8.0\Data\
default_authentication_plugin	caching_sha2_password
default_collation_for_utf8mb4	utf8mb4_0900_ai_ci
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	ON
expire_logs_days	0
explicit_defaults_for_timestamp	ON
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	NBSP.log
group_concat_max_len	1024
gtid_executed	384632e4-e18f-11e8-a8b6-00163e2e5672:1-198655, 385a0fee-e18f-11e8-a276-00163e10a665:1-34714384
gtid_executed_compression_period	1000
gtid_mode	OFF
gtid_owned
gtid_purged	384632e4-e18f-11e8-a8b6-00163e2e5672:1-198655, 385a0fee-e18f-11e8-a276-00163e10a665:1-34714384
have_compress	YES
have_dynamic_loading	YES
have_geometry	YES
have_openssl	YES
have_profiling	YES
have_query_cache	NO
have_rtree_keys	YES
have_ssl	YES
have_statement_timeout	YES
have_symlink	DISABLED
histogram_generation_max_mem_size	20000000
host_cache_size	279
hostname	nbsp
information_schema_stats_expiry	86400
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	2
innodb_buffer_pool_chunk_size	8388608
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	8388608
innodb_change_buffer_max_size	25
innodb_change_buffering	all
innodb_checksum_algorithm	crc32
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_dedicated_server	OFF
innodb_default_row_format	dynamic
innodb_directories
innodb_disable_sort_file_cache	OFF
innodb_doublewrite	ON
innodb_fast_shutdown	1
innodb_file_per_table	ON
innodb_fill_factor	100
innodb_flush_log_at_timeout	1
innodb_flush_log_at_trx_commit	1
innodb_flush_method	unbuffered
innodb_flush_neighbors	0
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_lock_wait_timeout	50
innodb_log_buffer_size	1048576
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_spin_cpu_abs_lwm	80
innodb_log_spin_cpu_pct_hwm	50
innodb_log_wait_for_flush_spin_hwm	400
innodb_log_write_ahead_size	8192
innodb_lru_scan_depth	1024
innodb_max_dirty_pages_pct	90.000000
innodb_max_dirty_pages_pct_lwm	10.000000
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_old_blocks_pct	37
innodb_old_blocks_time	1000
innodb_online_alter_log_max_size	134217728
innodb_open_files	300
innodb_optimize_fulltext_only	OFF
innodb_page_cleaners	1
innodb_page_size	16384
innodb_print_all_deadlocks	OFF
innodb_print_ddl_logs	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_redo_log_encrypt	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_transient_sample_pages	8
innodb_status_output	OFF
innodb_status_output_locks	OFF
innodb_strict_mode	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	25
innodb_thread_sleep_delay	0
innodb_tmpdir
innodb_undo_directory	.\
innodb_undo_log_encrypt	OFF
innodb_undo_log_truncate	ON
innodb_undo_tablespaces	2
innodb_use_native_aio	ON
innodb_version	8.0.12
innodb_write_io_threads	4
interactive_timeout	28800
internal_tmp_disk_storage_engine	InnoDB
internal_tmp_mem_storage_engine	TempTable
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
keyring_operations	ON
large_files_support	ON
large_page_size	0
large_pages	OFF
lc_messages	en_US
lc_messages_dir	C:\Program Files\MySQL\MySQL Server 8.0\share\
lc_time_names	en_US
license	GPL
local_infile	OFF
lock_wait_timeout	31536000
log_bin	ON
log_bin_basename	D:\ProgramData\MySQL\MySQL Server 8.0\Data\binlog
log_bin_index	D:\ProgramData\MySQL\MySQL Server 8.0\Data\binlog.index
log_bin_trust_function_creators	OFF
log_bin_use_v1_row_events	OFF
log_error	.\NBSP.err
log_error_services	log_filter_internal; log_sink_internal
log_error_verbosity	2
log_output	FILE
log_queries_not_using_indexes	OFF
log_slave_updates	ON
log_slow_admin_statements	OFF
log_slow_slave_statements	OFF
log_statements_unsafe_for_binlog	ON
log_syslog	ON
log_syslog_tag
log_throttle_queries_not_using_indexes	0
log_timestamps	UTC
long_query_time	10.000000
low_priority_updates	OFF
lower_case_file_system	ON
lower_case_table_names	1
mandatory_roles
master_info_repository	TABLE
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	151
max_delayed_threads	20
max_digest_length	1024
max_error_count	1024
max_execution_time	0
max_heap_table_size	16777216
max_insert_delayed_threads	20
max_join_size	18446744073709551615
max_length_for_sort_data	4096
max_points_in_geometry	65536
max_prepared_stmt_count	16382
max_relay_log_size	0
max_seeks_for_key	4294967295
max_sort_length	1024
max_sp_recursion_depth	0
max_user_connections	0
max_write_lock_count	4294967295
metadata_locks_cache_size	1024
metadata_locks_hash_instances	8
min_examined_row_limit	0
myisam_data_pointer_size	6
myisam_max_sort_file_size	107374182400
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
mysql_native_password_proxy_users	OFF
mysqlx_bind_address	*
mysqlx_connect_timeout	30
mysqlx_document_id_unique_prefix	0
mysqlx_idle_worker_thread_timeout	60
mysqlx_interactive_timeout	28800
mysqlx_max_allowed_packet	67108864
mysqlx_max_connections	100
mysqlx_min_worker_threads	2
mysqlx_port	33060
mysqlx_port_open_timeout	0
mysqlx_read_timeout	30
mysqlx_socket	/tmp/mysqlx.sock
mysqlx_ssl_ca
mysqlx_ssl_capath
mysqlx_ssl_cert
mysqlx_ssl_cipher
mysqlx_ssl_crl
mysqlx_ssl_crlpath
mysqlx_ssl_key
mysqlx_wait_timeout	28800
mysqlx_write_timeout	60
named_pipe	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
open_files_limit	6209
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,use_invisible_indexes=off
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	1048576
optimizer_trace_offset	-1
parser_max_mem_size	18446744073709551615
password_history	0
password_reuse_interval	0
performance_schema	ON
performance_schema_accounts_size	-1
performance_schema_digests_size	10000
performance_schema_error_size	4392
performance_schema_events_stages_history_long_size	10000
performance_schema_events_stages_history_size	10
performance_schema_events_statements_history_long_size	10000
performance_schema_events_statements_history_size	10
performance_schema_events_transactions_history_long_size	10000
performance_schema_events_transactions_history_size	10
performance_schema_events_waits_history_long_size	10000
performance_schema_events_waits_history_size	10
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_digest_sample_age	60
performance_schema_max_file_classes	80
performance_schema_max_file_handles	32768
performance_schema_max_file_instances	-1
performance_schema_max_index_stat	-1
performance_schema_max_memory_classes	450
performance_schema_max_metadata_locks	-1
performance_schema_max_mutex_classes	300
performance_schema_max_mutex_instances	-1
performance_schema_max_prepared_statements_instances	-1
performance_schema_max_program_instances	-1
performance_schema_max_rwlock_classes	60
performance_schema_max_rwlock_instances	-1
performance_schema_max_socket_classes	10
performance_schema_max_socket_instances	-1
performance_schema_max_sql_text_length	1024
performance_schema_max_stage_classes	150
performance_schema_max_statement_classes	212
performance_schema_max_statement_stack	10
performance_schema_max_table_handles	-1
performance_schema_max_table_instances	-1
performance_schema_max_table_lock_stat	-1
performance_schema_max_thread_classes	100
performance_schema_max_thread_instances	-1
performance_schema_session_connect_attrs_size	512
performance_schema_setup_actors_size	-1
performance_schema_setup_objects_size	-1
performance_schema_users_size	-1
persisted_globals_load	ON
pid_file	D:\ProgramData\MySQL\MySQL Server 8.0\Data\nbsp.pid
plugin_dir	C:\Program Files\MySQL\MySQL Server 8.0\lib\plugin\
port	3306
preload_buffer_size	32768
profiling	OFF
profiling_history_size	15
protocol_version	10
query_alloc_block_size	8192
query_prealloc_size	8192
range_alloc_block_size	4096
range_optimizer_max_mem_size	8388608
rbr_exec_mode	STRICT
read_buffer_size	8192
read_only	OFF
read_rnd_buffer_size	1
regexp_stack_limit	8000000
regexp_time_limit	32
relay_log	nbsp-relay-bin
relay_log_basename	D:\ProgramData\MySQL\MySQL Server 8.0\Data\nbsp-relay-bin
relay_log_index	D:\ProgramData\MySQL\MySQL Server 8.0\Data\nbsp-relay-bin.index
relay_log_info_file	relay-log.info
relay_log_info_repository	TABLE
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_read_size	8192
rpl_stop_slave_timeout	31536000
schema_definition_cache	256
secure_file_priv	C:\ProgramData\MySQL\MySQL Server 8.0\Uploads\
server_id	1
server_id_bits	32
server_uuid	fab2a9d1-d297-11e8-b80b-8cec4b9844c0
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_auto_generate_rsa_keys	ON
sha256_password_private_key_path	private_key.pem
sha256_password_proxy_users	OFF
sha256_password_public_key_path	public_key.pem
shared_memory	OFF
shared_memory_base_name	MYSQL
show_create_table_verbosity	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	C:\windows\SERVIC~3\NETWOR~1\AppData\Local\Temp
slave_max_allowed_packet	1073741824
slave_net_timeout	60
slave_parallel_type	DATABASE
slave_parallel_workers	0
slave_pending_jobs_size_max	134217728
slave_preserve_commit_order	OFF
slave_rows_search_algorithms	INDEX_SCAN,HASH_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	NBSP-slow.log
socket	MySQL
sort_buffer_size	262144
sql_auto_is_null	OFF
sql_big_selects	ON
sql_buffer_result	OFF
sql_log_off	OFF
sql_mode	STRICT_TRANS_TABLES,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	ca.pem
ssl_capath
ssl_cert	server-cert.pem
ssl_cipher
ssl_crl
ssl_crlpath
ssl_fips_mode	OFF
ssl_key	server-key.pem
stored_program_cache	256
stored_program_definition_cache	256
super_read_only	OFF
sync_binlog	1
sync_master_info	10000
sync_relay_log	10000
sync_relay_log_info	10000
system_time_zone
table_definition_cache	1400
table_open_cache	2000
table_open_cache_instances	16
tablespace_definition_cache	256
temptable_max_ram	1073741824
thread_cache_size	10
thread_handling	one-thread-per-connection
thread_stack	286720
time_zone	SYSTEM
tls_version	TLSv1,TLSv1.1,TLSv1.2
tmp_table_size	16777216
tmpdir	C:\windows\SERVIC~3\NETWOR~1\AppData\Local\Temp
transaction_alloc_block_size	8192
transaction_isolation	REPEATABLE-READ
transaction_prealloc_size	4096
transaction_read_only	OFF
transaction_write_set_extraction	XXHASH64
unique_checks	ON
updatable_views_with_limit	YES
version	8.0.12
version_comment	MySQL Community Server - GPL
version_compile_machine	x86_64
version_compile_os	Win64
version_compile_zlib	1.2.11
wait_timeout	28800
windowing_use_high_precision	ON