mysql - 为专用的 mariadb 服务器找到正确的配置——用于巨大的 innodb 表

Question

我一直在一个单独的服务器上工作来配置 mariadb，但查询仍然需要很长时间才能返回，而且大部分时间都不会返回。

Mariadb 版本:10.1.31-1 服务器有 50GB Ram 和 2200 Ghz * 10 核心 Centos7作为OP

目标数据库当前有非常大的 innodb 表并且没有很好地索引。只有 innodb 没有任何其他表类型。

目前我正在做一些嵌套的选择查询，并将结果保存到另一个空的克隆数据库中，插入或替换成。

举个例子:

REPLACE INTO db1.table1
SELECT * FROM db0.table1 WHERE ART_ID IN (
    SELECT ART_ID FROM db0.table2 WHERE BRA_ID IN (
        SELECT BRA_ID FROM db0.table3 WHERE BRAND IN (
            SELECT BRAND FROM db0.table4 WHERE ID IN (... bunch of comma seperated ids)
        )
    )
);

唯一的连接来自本地和/或只有一个远程连接。 服务器的唯一任务是将庞大的数据过滤到另一个数据库，没有网络服务器等。

我把/etc/my.cnf 文件放在下面。我对这个文件做了很多测试，所以你可能会看到一些无用的添加。

问题是:cnf文件中是否有遗漏的配置；是否有任何其他配置提示等可以在合理的时间内运行这些查询。

它运行得更好，但在我更改配置或/并更新服务器后，一切都变慢了。 (是的，我在更新数据库版本后也更新了表格)

# The MySQL server
[mysqld]
performance_schema=0
bind-address = 0.0.0.0
max_connections = 32
socket      = /var/lib/mysql/mysql.sock
skip-external-locking
max_allowed_packet = 1024M

connect_timeout=300
wait_timeout=1200
interactive_timeout=300

key_buffer_size = 2G
bulk_insert_buffer_size=256M
sort_buffer_size = 32M
#read_buffer_size = 8M
#read_rnd_buffer_size = 32M
myisam_sort_buffer_size = 32M
join_buffer_size=32M
#max_heap_table_size= 8G
tmp_table_size=8G
concurrent_insert=2
#external-locking=FALSE
#open_files_limit=50000

default-storage-engine=innodb
innodb_file_per_table=1

#lower_case_table_names=1

# Try number of CPU's*2 for thread_concurrency
innodb_write_io_threads=10
innodb_read_io_threads=20
#innodb_buffer_pool_instances=8
#thread_stack = 1M
#thread_cache_size = -1

innodb_buffer_pool_size = 16G

#query_cache_limit = 1073741824
#query_cache_size = 1073741824
#query_cache_type = 1

query_cache_size=0
query_cache_type=0

#innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size

innodb_fast_shutdown=0

#innodb_log_file_size = 1G
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 0
innodb_lock_wait_timeout = 1073741823
innodb_thread_concurrency=0
innodb_commit_concurrency=0
innodb_flush_method=O_DSYNC
innodb_log_compressed_pages = 0
#innodb_flush_neighbors = 0
#innodb_adaptive_hash_index_partitions = 8


log-bin=mysql-bin
server-id   = 1

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[isamchk]
key_buffer = 384M
sort_buffer = 384M
read_buffer = 256M
write_buffer = 256M

[myisamchk]
key_buffer = 384M
sort_buffer = 384M
read_buffer = 256M
write_buffer = 256M

[mysqlhotcopy]
interactive-timeout

---

我使用了 percona 向导并合并了建议。 当前的my.cnf如下。

我昨天晚上(2018-03-05 22:41:30 UTC)运行了 php 应用程序，但 mysql 仍然无法返回任何结果。

应用程序仅添加限制 10000 和偏移量(我不想从头开始，我目前正在跟踪最后一个偏移量并从该点开始。)

目前我正计划删除并重新安装 mariadb :( (会是情绪 react )

# Generated by Percona Configuration Wizard (http://tools.percona.com/) version REL5-20120208

[mysql]

# CLIENT #
port                           = 9999
socket                         = /var/lib/mysql/mysql.sock

[mysqld]

# GENERAL #
port                           = 9999
user                           = mysql
default-storage-engine         = InnoDB
socket                         = /var/lib/mysql/mysql.sock
pid-file                       = /var/lib/mysql/mysql.pid

# MyISAM # - there is no myisam table
key-buffer-size                = 32M
myisam-recover-options         = FORCE,BACKUP

# SAFETY #
max-allowed-packet             = 16M
max-connect-errors             = 1000000
skip-name-resolve

# DATA STORAGE #
datadir                        = /var/lib/mysql/

# BINARY LOGGING #
log-bin                        = /var/lib/mysql/mysql-bin
expire-logs-days               = 14
sync-binlog                    = 1

# CACHES AND LIMITS #
tmp-table-size                 = 32M
max-heap-table-size            = 32M
query-cache-type               = 0
query-cache-size               = 0
max-connections                = 30
#thread-cache-size              = 16
open-files-limit               = 65535
table-definition-cache         = 1024
table-open-cache               = 2048

# INNODB #
innodb-flush-method            = O_DIRECT
innodb-log-files-in-group      = 2
innodb-log-file-size           = 5G
innodb-flush-log-at-trx-commit = 1
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 42G
innodb-buffer-pool-instances   = 42


thread_cache_size=100
innodb_lru_scan_depth=100
innodb_purge_threads=4
innodb_read_io_threads=64
innodb_write_io_threads=64
innodb_thread_concurrency=0
max_seeks_for_key=32
max_write_lock_count=16
thread_concurrency=35

innodb_fast_shutdown=0
innodb_file_per_table=1
default-storage-engine=innodb
concurrent_insert=2
join_buffer_size=32M
tmp_table_size=8G
read_buffer_size = 8M

# LOGGING #
log-error                      = /var/lib/mysql/mysql-error.log
log-queries-not-using-indexes  = 0
slow-query-log                 = 1
slow-query-log-file            = /var/lib/mysql/mysql-slow.log

Answer 1

Question中的my.cnf数据与SHOW GLOBAL VARIABLES不匹配；值(value)观。

请使用此链接
https://mariadb.com/kb/en/library/configuring-mariadb-with-mycnf/
以帮助获得准确的匹配值以获得帮助。

然后，您的 my.cnf [mysqld] 部分需要考虑的建议包括:

innodb_buffer_pool_size=8G  # from > 40G (95% of RAM will not work well)
innodb_lru_scan_depth=100  # from 1024  see refman every second digging too deep
log_warnings=2  # from 1 to include connection errors more detail
max_connect_errors=10  # from 1,000,000 no need to waste a million cycles
thread_cache_size=100  # from 16  CAP per V8 MySQ to be prepared for volume
have_symlink=NO  # to protect you server, unless you NEED it
innodb_purge_threads=4  # from 1  to accommodate when needed
innodb_read_io_threads=64  # from 4 see dba.stackexhange.com Q 5666 9/12/11 Rolando
innodb_write_io_threads=64  # from 4  per Rolando to use multi-core
innodb_thrad_concurrency=0  # another part of multi-core enabling
max_seeks_for_key=32  # from huge number, not found in 32, will not be found
max_write_lock_count=16  # give RD opportunity after nn locks
thread_concurrency=35  # to limit concurrent processing load

@Erce，请在正确的事件 my.cnf 中应用。撤回我重做您的 mysqld 部分的提议。