0

5.13 我们根据 mysql Tuner 和 Tuning Primer 对 my.cnf 进行了调整，但我无法确定内存何时会稳定 mariadb 的使用。

这里 mysql 调谐器结果 -

------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 5d 8h 19m 28s (226M q [491.299 qps], 1M conn, TX: 4653G, RX: 49G)
[--] Reads / Writes: 95% / 5%
[--] Binary logging is disabled
[--] Physical Memory     : 125.3G
[--] Max MySQL memory    : 67.1G
[--] Other process memory: 0B
[--] Total buffers: 15.4G global + 264.8M per thread (200 max threads)
[--] P_S Max memory usage: 0B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 34.3G (27.34% of installed RAM)
[OK] Maximum possible memory usage: 67.1G (53.54% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (78/226M)
[OK] Highest usage of available connections: 36% (73/200)
[OK] Aborted connections: 0.02%  (447/1823123)
[!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance
[OK] Query cache is disabled by default due to mutex contention on multiprocessor machines.
[OK] Sorts requiring temporary tables: 0% (4K temp sorts / 56M sorts)
[!!] Joins performed without indexes: 815533
[!!] Temporary tables created on disk: 87% (26M on disk / 30M total)
[OK] Thread cache hit rate: 99% (73 created / 1M connections)
[OK] Table cache hit rate: 99% (286M hits / 287M requests)
[OK] table_definition_cache(37000) is upper than number of tables(36204)
[OK] Open file limit used: 69% (51K/74K)
[OK] Table locks acquired immediately: 99% (170M immediate / 170M locks)

这里调整入门 -

WORKER THREADS
Current thread_cache_size = 200
Current threads_cached = 72
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 200
Current threads_connected = 1
Historic max_used_connections = 73
The number of used connections is 36% of the configured maximum.
Your max_connections variable seems to be fine.

INNODB STATUS
Current InnoDB index space = 1.46 G
Current InnoDB data space = 10.79 G
Current InnoDB buffer pool free = 24 %
Current innodb_buffer_pool_size = 15.00 G
Depending on how much space your innodb indexes take up it may be safe
to increase this value to up to 2 / 3 of total system memory

MEMORY USAGE
Max Memory Ever Allocated : 15.76 G
Configured Max Per-thread Buffers : 1.71 G
Configured Max Global Buffers : 15.14 G
Configured Max Memory Limit : 16.85 G
Physical Memory : 125.34 G
Max memory limit seem to be within acceptable norms

这里是从启动到 mariadb 正常运行时间 5 天 8 小时的资源示例 -

mysql     20   0   21.4g   4.1g  24576 S   4.7   3.3   0:08.90 mariadbd
mysql     20   0   21.4g   4.8g  25728 S   4.7   3.8   2:13.62 mariadbd
mysql     20   0   25.9g   8.7g  26480 S  15.0   6.9  56:52.91 mariadbd
mysql     20   0   26.2g   8.8g  26480 S   3.7   7.0  58:37.38 mariadbd
mysql     20   0   26.7g   9.3g  26480 S  10.6   7.4  66:38.53 mariadbd
mysql     20   0   26.7g   9.3g  26480 S   6.3   7.4  76:34.20 mariadbd
mysql     20   0   26.9g   9.6g  26480 S  10.0   7.7  80:31.37 mariadbd
mysql     20   0   26.9g   9.8g  26480 S  10.3   7.8  95:36.03 mariadbd
mysql     20   0   27.4g  10.2g  26480 S   8.0   8.1  96:28.67 mariadbd
mysql     20   0   27.7g  12.4g  26496 S   2.7   9.9 127:20.78 mariadbd
mysql     20   0   27.7g  15.0g  26496 S  11.3  12.0 129:35.15 mariadbd
mysql     20   0   27.7g  16.3g  26492 S   4.7  13.0 130:34.33 mariadbd
mysql     20   0   27.7g  16.3g  26492 S  22.9  13.0 135:47.21 mariadbd
mysql     20   0   27.7g  16.4g  26460 S  13.3  13.1 182:57.25 mariadbd
mysql     20   0   27.7g  16.9g  26436 S   5.0  13.5 186:18.78 mariadbd
mysql     20   0   28.2g  17.4g  26436 S  27.9  13.9 220:29.14 mariadbd
mysql     20   0   28.2g  17.4g  26436 S  10.3  13.9 240:20.25 mariadbd
mysql     20   0   28.6g  17.8g  26436 S  15.9  14.2 242:50.85 mariadbd
mysql     20   0   28.6g  17.9g  26436 S   6.6  14.2 244:48.40 mariadbd
mysql     20   0   29.0g  18.3g  26436 S   5.0  14.6 271:35.53 mariadbd
mysql     20   0   29.4g  18.5g  26480 S  11.6  14.7 327:44.08 mariadbd
mysql     20   0   29.8g  18.9g  26480 S  21.6  15.1 328:47.99 mariadbd
mysql     20   0   29.8g  18.9g  26480 S   3.7  15.1 340:27.10 mariadbd
mysql     20   0   29.8g  18.9g  26480 S   7.0  15.1 360:15.26 mariadbd
mysql     20   0   30.2g  19.6g  26460 S   3.6  15.7 397:31.67 mariadbd
mysql     20   0   31.4g  20.1g  26460 S   6.6  16.1 424:18.82 mariadbd
mysql     20   0   31.8g  20.6g  26460 S   1.7  16.5 434:33.15 mariadbd
mysql     20   0   31.8g  20.7g  26460 S  12.3  16.5 474:25.23 mariadbd
mysql     20   0   32.1g  21.1g  26444 S   9.6  16.9 501:38.46 mariadbd
mysql     20   0   32.1g  21.1g  26448 S  14.0  16.9 509:05.98 
mysql     20   0   32.5g  21.6g  26448 S  10.3  17.2 524:06.26 mariadbd
mysql     20   0   33.0g  22.0g  26448 S   7.0  17.6 527:11.55 mariadbd
mysql     20   0   33.5g  22.5g  25612 S  29.9  17.9 578:12.81 mariadbd
mysql     20   0   33.5g  22.5g  25612 S   2.3  18.0 580:04.96 mariadbd
mysql     20   0   34.4g  23.4g  25044 S  17.9  18.7 647:25.39 mariadbd
mysql     20   0   35.3g  24.5g  25272 S  10.0  19.5 753:34.30 mariadbd
mysql     20   0   35.7g  24.9g  25272 S  10.0  19.9 766:17.57 mariadbd

如果我试图通过服务状态确定内存使用情况，则结果如下 -

service mariadb status
Redirecting to /bin/systemctl status mariadb.service
● mariadb.service - MariaDB 10.5.13 database server
   Active: active (running) since Mon 2022-01-03 03:03:15 IST; 5 days ago
     Docs: man:mariadbd(8)
           https://mariadb.com/kb/en/library/systemd/
 Main PID: (mariadbd)
   Status: "Taking your SQL requests now..."
    Tasks: 87 (limit: 820947)
   Memory: 37.4G

现在我只看到这么多无关紧要的当前内存使用情况，例如调整引物返回 -

Configured Max Memory Limit : 16.85 G

但 mysql 调谐器返回 -

[OK] Maximum reached memory usage: 34.3G (27.34% of installed RAM)

[OK] Maximum possible memory usage: 67.1G (53.54% of installed RAM)

附加 my.cnf 配置 -

performance-schema=0
#innodb_buffer_pool_size=134217728
max_allowed_packet=268435456
open_files_limit=74000
innodb_file_per_table=1
unix_socket=OFF
max_connections=200
#wait_timeout=600
#interactive_timeout=600
##
innodb_buffer_pool_size=15G
max_heap_table_size=128M
tmp_table_size=128M
#max_connections=400
table_open_cache=37000
table_definition_cache=37000
thread_cache_size=200
key_buffer_size=128M
sort_buffer_size=1M
read_buffer_size=4M
read_rnd_buffer_size=512k
join_buffer_size=3M
##

但是如你所见，top 命令返回 24.9GB 内存使用量，而服务状态返回 37.4GB 内存使用量？和调优入门说最大内存是 16.85GB，但 mysql Tuner 说 67.1GB？

我完全迷失了这个..什么时候内存会建立起来直到内存使用稳定？为什么调优引物和 mysql Tuner 内存使用量如此不同？从服务器本身用于 mariadb 服务的当前使用情况？

任何人都可以分享他的想法吗？

谢谢！

编辑 - 嘿，谢谢你的回复，它只是在 7 天半后不断增加 -

mysql     20   0   36.2g  25.4g  25280 S  10.3  20.3 811:15.91 mariadbd
mysql     20   0   36.7g  25.8g  25296 S   5.0  20.6 840:23.93 mariadbd
mysql     20   0   37.1g  26.3g  25296 S   3.3  20.9 843:11.06 mariadbd
mysql     20   0   37.1g  26.3g  25296 S   7.6  21.0 846:27.98 mariadbd
mysql     20   0   37.1g  26.5g  25296 S  14.9  21.1 898:34.45 mariadbd
mysql     20   0   37.2g  26.5g  25272 S  13.0  21.1 933:06.45 mariadbd
mysql     20   0   37.2g  26.5g  25260 S  25.0  21.2 956:38.96 mariadbd
mysql     20   0   37.6g  26.9g  25260 S   4.3  21.5 992:54.48 mariadbd
mysql     20   0   38.0g  27.4g  25252 S  17.5  21.9   1068:31 mariadbd

 mariadb.service - MariaDB 10.5.13 database server
   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
  Drop-In: /etc/systemd/system/mariadb.service.d
           └─migrated-from-my.cnf-settings.conf
   Active: active (running) since Mon 2022-01-03 03:03:15 IST; 1 weeks 0 days ago
     Docs: man:mariadbd(8)
           https://mariadb.com/kb/en/library/systemd/
 Main PID: 4105634 (mariadbd)
   Status: "Taking your SQL requests now..."
    Tasks: 86 (limit: 820947)
   Memory: 41.0G


              total        used        free      shared  buff/cache   available
Mem:         128350       35498        9313        2356       83538       89236
Swap:             0           0           0
4

2 回答 2

1

systemd 服务状态 37.4G 看起来与顶部的 35.7g 数字一致（GiB 与 GB 可能解释了差异）。

顶部的 24.9G 是分页的数量。与 37.4G 的区别在于内存未分页（或可能换出）。

Tuning Primer 的 16.58G 看起来它没有考虑所有线程的内存使用情况

mysqltuner 的最大值看起来像是对每个线程分配的最大值进行了悲观的分配，这并没有发生，因为您的工作负载显然不会达到这个数字。

如果您的 5 天正常运行时间与您的工作量相当一致，那么 35/37G 看起来大约是使用的最大值。

让它从这一点上升的事情是如果你的 24% 空闲缓冲池被使用。您的调优入门显示 24% 的可用内存在 15G 上为我们当前的工作负载提供了另外 3.6G 的潜在内存。

于 2022-01-08T23:47:19.723 回答
0

大约 3 小时前 MySQL Tuner 已满 -

-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 7d 9h 28m 52s (316M q [495.709 qps], 2M conn, TX: 6533G, RX: 69G)
[--] Reads / Writes: 95% / 5%
[--] Binary logging is disabled
[--] Physical Memory : 125.3G
[--] Max MySQL memory : 67.1G
[--] Other process memory: 0B
[--] Total buffers: 15.4G global + 264.8M per thread (200 max threads)
[--] P_S Max memory usage: 0B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 34.3G (27.34% of installed RAM)
[OK] Maximum possible memory usage: 67.1G (53.54% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (111/316M)
[OK] Highest usage of available connections: 36% (73/200)
[OK] Aborted connections: 0.02% (605/2516029)
[!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance
[OK] Query cache is disabled by default due to mutex contention on multiprocessor machines.
[OK] Sorts requiring temporary tables: 0% (6K temp sorts / 78M sorts)
[!!] Joins performed without indexes: 1135010
[!!] Temporary tables created on disk: 87% (36M on disk / 41M total)
[OK] Thread cache hit rate: 99% (73 created / 2M connections)
[OK] Table cache hit rate: 99% (398M hits / 400M requests)
[OK] table_definition_cache(37000) is upper than number of tables(36425)
[OK] Open file limit used: 69% (51K/74K)
[OK] Table locks acquired immediately: 99% (242M immediate / 242M locks)

-------- Performance schema ------------------------------------------------------------------------
[--] Performance schema is disabled.
[--] Memory used by P_S: 0B
[--] Sys schema isn't installed.

-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is enabled.
[--] Thread Pool Size: 36 thread(s).
[--] Using default value is good enough for your version (10.5.13-MariaDB)

-------- MyISAM Metrics ----------------------------------------------------------------------------
[OK] Key buffer used: 99.7% (127.6M used / 128.0M cache)
[OK] Key buffer size / total MyISAM indexes: 128.0M/1.3G
[OK] Read Key buffer hit rate: 99.9% (3B cached / 1M reads)
[!!] Write Key buffer hit rate: 43.1% (31M cached / 13M writes)

-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[OK] InnoDB buffer pool / data size: 15.0G/12.2G
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (0.625 %): 96.0M * 1/15.0G should be equal to 25%
[--] Number of InnoDB Buffer Pool Chunk : 120 for 1 Buffer Pool Instance(s)
[OK] Innodb_buffer_pool_size aligned with Innodb_buffer_pool_chunk_size & Innodb_buffer_pool_instances
[OK] InnoDB Read buffer efficiency: 99.99% (7707381322 hits/ 7708055862 total)
[!!] InnoDB Write Log efficiency: 335.3% (2710443 hits/ 808371 total)
[OK] InnoDB log waits: 0.00% (0 waits / 3518814 writes)

-------- Aria Metrics ------------------------------------------------------------------------------
[--] Aria Storage Engine is enabled.
[OK] Aria pagecache size / total Aria indexes: 128.0M/896.0K
[OK] Aria pagecache hit rate: 97.8% (1B cached / 30M reads)

-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.

-------- XtraDB Metrics ----------------------------------------------------------------------------
[--] XtraDB is disabled.

-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is disabled.

-------- Replication Metrics -----------------------------------------------------------------------
[--] Galera Synchronous replication: NO
[--] No replication slave(s) for this server.
[--] Binlog format: MIXED
[--] XA support enabled: ON
[--] Semi synchronous replication Master: OFF
[--] Semi synchronous replication Slave: OFF
[--] This is a standalone server

继承人上衣 -

top - 17:06:15 up 67 days, 14:15,  1 user,  load average: 2.88, 2.79, 2.77
Tasks: 560 total,   3 running, 557 sleeping,   0 stopped,   0 zombie
%Cpu(s):  4.0 us,  0.6 sy,  0.1 ni, 95.3 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
MiB Mem : 128350.7 total,   7895.4 free,  35970.4 used,  84484.8 buff/cache
MiB Swap:      0.0 total,      0.0 free,      0.0 used.  89024.2 avail Mem

除了 mariadb 使用大量内存之外什么都没有，一些 LSPHP 进程会产生并针对服务器内托管的站点的 php 请求进行处理，但它们仅使用内存来处理请求然后释放它.. 但总体 cpu 平均值约为 3-12% cpu使用，因此服务器不会承受重负载。

服务器规格 -

Intel xeon w-2295
software raid 1 with 2 NVMEs hard drives
OS - Cloudlinux 8.5 (based of almalinux 8.5 + redhat)
server using cPanel with mariadb 10.5.3 of cPanel.
128GB ram ecc memory

从 information_schema.tables中选择计数（ ）；计数（） 94

进程列表 -

Show MySQL Processes
Id  User    Host    db  Command Time    State   Info    Progress
      root  localhost   NULL    Query   0   starting    SHOW PROCESSLIST    0.000

有时您会在进程列表中看到大约 4-14 个进程。

Variable_name
Value
alter_algorithm
DEFAULT
analyze_sample_percentage
100.000000
aria_block_size
8192
aria_checkpoint_interval
30
aria_checkpoint_log_activity
1048576
aria_encrypt_tables
OFF
aria_force_start_after_recovery_failures
0
aria_group_commit
none
aria_group_commit_interval
0
aria_log_file_size
1073741824
aria_log_purge_type
immediate
aria_max_sort_file_size
9223372036853727232
aria_page_checksum
ON
aria_pagecache_age_threshold
300
aria_pagecache_buffer_size
134217728
aria_pagecache_division_limit
100
aria_pagecache_file_hash_size
512
aria_recover_options
BACKUP,QUICK
aria_repair_threads
1
aria_sort_buffer_size
268434432
aria_stats_method
nulls_unequal
aria_sync_log_dir
NEWFILE
aria_used_for_temp_tables
ON
auto_increment_increment
1
auto_increment_offset
1
autocommit
ON
automatic_sp_privileges
ON
back_log
90
basedir
/usr/
big_tables
OFF
bind_address
binlog_annotate_row_events
ON
binlog_cache_size
32768
binlog_checksum
CRC32
binlog_commit_wait_count
0
binlog_commit_wait_usec
100000
binlog_direct_non_transactional_updates
OFF
binlog_file_cache_size
16384
binlog_format
MIXED
binlog_optimize_thread_scheduling
ON
binlog_row_image
FULL
binlog_row_metadata
NO_LOG
binlog_stmt_cache_size
32768
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_constraint_checks
ON
collation_connection
latin1_swedish_ci
collation_database
latin1_swedish_ci
collation_server
latin1_swedish_ci
column_compression_threshold
100
column_compression_zlib_level
6
column_compression_zlib_strategy
DEFAULT_STRATEGY
column_compression_zlib_wrap
OFF
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
deadlock_search_depth_long
15
deadlock_search_depth_short
4
deadlock_timeout_long
50000000
deadlock_timeout_short
10000
debug_no_thread_alarm
OFF
default_password_lifetime
0
default_regex_flags
default_storage_engine
InnoDB
default_tmp_storage_engine
default_week_format
0
delay_key_write
ON
delayed_insert_limit
100
delayed_insert_timeout
300
delayed_queue_size
1000
disconnect_on_expired_password
OFF
div_precision_increment
4
encrypt_binlog
OFF
encrypt_tmp_disk_tables
OFF
encrypt_tmp_files
OFF
enforce_storage_engine
eq_range_index_dive_limit
200
event_scheduler
OFF
expensive_subquery_limit
100
expire_logs_days
0
explicit_defaults_for_timestamp
OFF
extra_max_connections
1
extra_port
0
flush
OFF
flush_time
0
foreign_key_checks
ON
ft_boolean_syntax
+ -><()~*:""&|
ft_max_word_len
84
ft_min_word_len
4
Variable_name
Value
 
ft_query_expansion_limit
20
ft_stopword_file
(built-in)
general_log
OFF
general_log_file
servername.log
group_concat_max_len
1048576
gtid_binlog_pos
gtid_binlog_state
gtid_cleanup_batch_size
64
gtid_current_pos
gtid_domain_id
0
gtid_ignore_duplicates
OFF
gtid_pos_auto_engines
gtid_slave_pos
gtid_strict_mode
OFF
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
DISABLED
have_symlink
YES
histogram_size
254
histogram_type
DOUBLE_PREC_HB
host_cache_size
328
hostname
hostname
idle_readonly_transaction_timeout
0
idle_transaction_timeout
0
idle_write_transaction_timeout
0
ignore_builtin_innodb
OFF
ignore_db_dirs
in_predicate_conversion_threshold
1000
init_connect
init_file
init_slave
innodb_adaptive_flushing
ON
innodb_adaptive_flushing_lwm
10.000000
innodb_adaptive_hash_index
OFF
innodb_adaptive_hash_index_parts
8
innodb_adaptive_max_sleep_delay
0
innodb_autoextend_increment
64
innodb_autoinc_lock_mode
1
innodb_background_scrub_data_check_interval
0
innodb_background_scrub_data_compressed
OFF
innodb_background_scrub_data_interval
0
innodb_background_scrub_data_uncompressed
OFF
innodb_buf_dump_status_frequency
0
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
16106127360
innodb_change_buffer_max_size
25
innodb_change_buffering
all
innodb_checksum_algorithm
full_crc32
innodb_cmp_per_index_enabled
OFF
innodb_commit_concurrency
0
innodb_compression_algorithm
zlib
innodb_compression_default
OFF
innodb_compression_failure_threshold_pct
5
innodb_compression_level
6
innodb_compression_pad_pct_max
50
innodb_concurrency_tickets
0
innodb_data_file_path
ibdata1:12M:autoextend
innodb_data_home_dir
innodb_deadlock_detect
ON
innodb_default_encryption_key_id
1
innodb_default_row_format
dynamic
innodb_defragment
OFF
innodb_defragment_fill_factor
0.900000
innodb_defragment_fill_factor_n_recs
20
innodb_defragment_frequency
40
innodb_defragment_n_pages
7
innodb_defragment_stats_accuracy
0
innodb_disable_sort_file_cache
OFF
innodb_disallow_writes
OFF
innodb_doublewrite
ON
innodb_encrypt_log
OFF
innodb_encrypt_tables
OFF
innodb_encrypt_temporary_tables
OFF
innodb_encryption_rotate_key_age
1
innodb_encryption_rotation_iops
100
innodb_encryption_threads
0
innodb_fast_shutdown
1
innodb_fatal_semaphore_wait_threshold
600
innodb_file_format
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
fsync
innodb_flush_neighbors
1
innodb_flush_sync
ON
Variable_name
Value
 
innodb_flushing_avg_loops
30
innodb_force_load_corrupted
OFF
innodb_force_primary_key
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_immediate_scrub_data_uncompressed
OFF
innodb_instant_alter_column_allowed
add_drop_reorder
innodb_io_capacity
200
innodb_io_capacity_max
2000
innodb_large_prefix
innodb_lock_schedule_algorithm
fcfs
innodb_lock_wait_timeout
50
innodb_log_buffer_size
16777216
innodb_log_checksums
ON
innodb_log_compressed_pages
ON
innodb_log_file_size
100663296
innodb_log_files_in_group
1
innodb_log_group_home_dir
./
innodb_log_optimize_ddl
OFF
innodb_log_write_ahead_size
8192
innodb_lru_flush_size
32
innodb_lru_scan_depth
1536
innodb_max_dirty_pages_pct
90.000000
innodb_max_dirty_pages_pct_lwm
0.000000
innodb_max_purge_lag
0
innodb_max_purge_lag_delay
0
innodb_max_purge_lag_wait
4294967295
innodb_max_undo_log_size
10485760
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
36885
innodb_optimize_fulltext_only
OFF
innodb_page_cleaners
1
innodb_page_size
16384
innodb_prefix_index_cluster_optimization
OFF
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_scrub_log
OFF
innodb_scrub_log_speed
256
innodb_sort_buffer_size
1048576
innodb_spin_wait_delay
4
innodb_stats_auto_recalc
ON
innodb_stats_include_delete_marked
OFF
innodb_stats_method
nulls_equal
innodb_stats_modified_counter
0
innodb_stats_on_metadata
OFF
innodb_stats_persistent
ON
innodb_stats_persistent_sample_pages
20
innodb_stats_traditional
ON
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
0
innodb_thread_sleep_delay
0
innodb_tmpdir
innodb_undo_directory
./
innodb_undo_log_truncate
OFF
innodb_undo_logs
128
innodb_undo_tablespaces
0
innodb_use_atomic_writes
ON
innodb_use_native_aio
ON
innodb_version
10.5.13
innodb_write_io_threads
4
interactive_timeout
28800
join_buffer_size
3145728
join_buffer_space_limit
2097152
join_cache_level
2
keep_files_on_create
OFF
key_buffer_size
134217728
key_cache_age_threshold
300
key_cache_block_size
1024
Variable_name
Value
 
key_cache_division_limit
100
key_cache_file_hash_size
512
key_cache_segments
0
large_files_support
ON
large_page_size
0
large_pages
OFF
lc_messages
en_US
lc_messages_dir
lc_time_names
en_US
license
GPL
local_infile
ON
lock_wait_timeout
86400
locked_in_memory
OFF
log_bin
OFF
log_bin_basename
log_bin_compress
OFF
log_bin_compress_min_len
256
log_bin_index
log_bin_trust_function_creators
OFF
log_disabled_statements
sp
log_error
/var/lib/mysql/hostname.err
log_output
FILE
log_queries_not_using_indexes
OFF
log_slave_updates
OFF
log_slow_admin_statements
ON
log_slow_disabled_statements
sp
log_slow_filter
admin,filesort,filesort_on_disk,filesort_priority_...
log_slow_rate_limit
1
log_slow_slave_statements
ON
log_slow_verbosity
log_tc_size
24576
log_warnings
2
long_query_time
10.000000
low_priority_updates
OFF
lower_case_file_system
OFF
lower_case_table_names
0
master_verify_checksum
OFF
max_allowed_packet
268435456
max_binlog_cache_size
18446744073709547520
max_binlog_size
1073741824
max_binlog_stmt_cache_size
18446744073709547520
max_connect_errors
100
max_connections
200
max_delayed_threads
20
max_digest_length
1024
max_error_count
64
max_heap_table_size
134217728
max_insert_delayed_threads
20
max_join_size
18446744073709551615
max_length_for_sort_data
1024
max_password_errors
4294967295
max_prepared_stmt_count
16382
max_recursive_iterations
4294967295
max_relay_log_size
1073741824
max_rowid_filter_size
131072
max_seeks_for_key
4294967295
max_session_mem_used
9223372036854775807
max_sort_length
1024
max_sp_recursion_depth
0
max_statement_time
0.000000
max_tmp_tables
32
max_user_connections
0
max_write_lock_count
4294967295
metadata_locks_cache_size
1024
metadata_locks_hash_instances
8
min_examined_row_limit
0
mrr_buffer_size
262144
myisam_block_size
1024
myisam_data_pointer_size
6
myisam_max_sort_file_size
9223372036853727232
myisam_mmap_size
18446744073709551615
myisam_recover_options
BACKUP,QUICK
myisam_repair_threads
1
myisam_sort_buffer_size
134216704
myisam_stats_method
NULLS_UNEQUAL
myisam_use_mmap
OFF
mysql56_temporal_format
ON
net_buffer_length
16384
net_read_timeout
30
net_retry_count
10
net_write_timeout
60
old
OFF
old_alter_table
DEFAULT
old_mode
old_passwords
OFF
open_files_limit
74000
optimizer_max_sel_arg_weight
32000
optimizer_prune_level
1
optimizer_search_depth
62
optimizer_selectivity_sampling_limit
100
optimizer_switch
index_merge=on,index_merge_union=on,index_merge_so...
optimizer_trace
enabled=off
optimizer_trace_max_mem_size
1048576
optimizer_use_condition_selectivity
4
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_...
-1
Variable_name
Value
 
performance_schema_events_statements_history_size
-1
performance_schema_events_transactions_history_lon...
-1
performance_schema_events_transactions_history_siz...
-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
90
performance_schema_max_cond_instances
-1
performance_schema_max_digest_length
1024
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
320
performance_schema_max_metadata_locks
-1
performance_schema_max_mutex_classes
210
performance_schema_max_mutex_instances
-1
performance_schema_max_prepared_statements_instanc...
-1
performance_schema_max_program_instances
-1
performance_schema_max_rwlock_classes
50
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
160
performance_schema_max_statement_classes
222
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
50
performance_schema_max_thread_instances
-1
performance_schema_session_connect_attrs_size
-1
performance_schema_setup_actors_size
-1
performance_schema_setup_objects_size
-1
performance_schema_users_size
-1
pid_file
/var/lib/mysql/servername.pid
plugin_dir
/usr/lib64/mysql/plugin/
plugin_maturity
gamma
port
3306
preload_buffer_size
32768
profiling
OFF
profiling_history_size
15
progress_report_time
5
protocol_version
10
proxy_protocol_networks
query_alloc_block_size
16384
query_cache_limit
1048576
query_cache_min_res_unit
4096
query_cache_size
1048576
query_cache_strip_comments
OFF
query_cache_type
OFF
query_cache_wlock_invalidate
OFF
query_prealloc_size
24576
range_alloc_block_size
4096
read_binlog_speed_limit
0
read_buffer_size
4194304
read_only
OFF
read_rnd_buffer_size
524288
relay_log
relay_log_basename
relay_log_index
relay_log_info_file
relay-log.info
relay_log_purge
ON
relay_log_recovery
OFF
relay_log_space_limit
0
replicate_annotate_row_events
ON
replicate_do_db
replicate_do_table
replicate_events_marked_for_skip
REPLICATE
replicate_ignore_db
replicate_ignore_table
replicate_wild_do_table
replicate_wild_ignore_table
report_host
report_password
report_port
3306
report_user
require_secure_transport
OFF
rowid_merge_buff_size
8388608
rpl_semi_sync_master_enabled
OFF
rpl_semi_sync_master_timeout
10000
rpl_semi_sync_master_trace_level
32
rpl_semi_sync_master_wait_no_slave
ON
rpl_semi_sync_master_wait_point
AFTER_COMMIT
rpl_semi_sync_slave_delay_master
OFF
rpl_semi_sync_slave_enabled
OFF
rpl_semi_sync_slave_kill_conn_timeout
5
rpl_semi_sync_slave_trace_level
32
secure_auth
ON
secure_file_priv
secure_timestamp
NO
server_id
1
session_track_schema
ON
session_track_state_change
OFF
session_track_system_variables
autocommit,character_set_client,character_set_conn...
session_track_transaction_info
OFF
skip_external_locking
ON
skip_name_resolve
OFF
skip_networking
OFF
Variable_name
Value
 
skip_show_database
OFF
slave_compressed_protocol
OFF
slave_ddl_exec_mode
IDEMPOTENT
slave_domain_parallel_threads
0
slave_exec_mode
STRICT
slave_load_tmpdir
/tmp
slave_max_allowed_packet
1073741824
slave_net_timeout
60
slave_parallel_max_queued
131072
slave_parallel_mode
optimistic
slave_parallel_threads
0
slave_parallel_workers
0
slave_run_triggers_for_rbr
NO
slave_skip_errors
OFF
slave_sql_verify_checksum
ON
slave_transaction_retries
10
slave_transaction_retry_errors
1158,1159,1160,1161,1205,1213,1429,2013,12701
slave_transaction_retry_interval
0
slave_type_conversions
slow_launch_time
2
slow_query_log
OFF
slow_query_log_file
servername-slow.log
socket
/var/lib/mysql/mysql.sock
sort_buffer_size
1048576
sql_auto_is_null
OFF
sql_big_selects
ON
sql_buffer_result
OFF
sql_if_exists
OFF
sql_log_bin
ON
sql_log_off
OFF
sql_mode
STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_...
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
standard_compliant_cte
ON
storage_engine
InnoDB
stored_program_cache
256
strict_password_validation
ON
sync_binlog
0
sync_frm
ON
sync_master_info
10000
sync_relay_log
10000
sync_relay_log_info
10000
system_time_zone
IST
system_versioning_alter_history
ERROR
system_versioning_asof
DEFAULT
table_definition_cache
37000
table_open_cache
36885
table_open_cache_instances
1
tcp_keepalive_interval
0
tcp_keepalive_probes
0
tcp_keepalive_time
0
tcp_nodelay
ON
thread_cache_size
200
thread_handling
one-thread-per-connection
thread_pool_dedicated_listener
OFF
thread_pool_exact_stats
OFF
thread_pool_idle_timeout
60
thread_pool_max_threads
65536
thread_pool_oversubscribe
3
thread_pool_prio_kickup_timer
1000
thread_pool_priority
auto
thread_pool_size
36
thread_pool_stall_limit
500
thread_stack
299008
time_format
%H:%i:%s
time_zone
SYSTEM
tls_version
TLSv1.1,TLSv1.2,TLSv1.3
tmp_disk_table_size
18446744073709551615
tmp_memory_table_size
134217728
tmp_table_size
134217728
tmpdir
/tmp

无法将完整的全局婴儿车粘贴为堆栈限制，但这大约是 95%。

我们在之前的 my.cnf 编辑中禁用了交换，对于 mariadb，即使系统中有大量空闲内存仍在构建交换，直到交换达到 100%（4GB 交换）。

于 2022-01-10T15:38:35.650 回答