Question

我正在尝试对其中包含2亿条记录的表进行分区。并且它会引发异常，因为锁的总数超过了锁表大小。我在网上阅读了一些建议并更改了my.cnf文件。这是配置：

# PER CLIENT SETTINGS #
# bit high but I got tons of ram here #
sort_buffer_size                = 2M
read_buffer_size                = 2M
binlog_cache_size               = 1M
wait_timeout                    = 31536000
interactive_timeout             = 300
max_allowed_packet              = 12M
thread_stack                    = 128K
table_cache                     = 1024
myisam_sort_buffer_size         = 1M
tmp_table_size                  = 12M
max_heap_table_size             = 12M


# LOGGING #
log_queries_not_using_indexes  = 1
slow_query_log                 = 1
slow_query_log_file            = /var/lib/mysql/slowquery.log

# MyISAM #
key_buffer_size                = 32M
myisam_recover                 = FORCE,BACKUP

# SAFETY #
max_allowed_packet             = 16M
max_connect_errors             = 1000000


# 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                = 500
thread-cache-size              = 50
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           = 512M
innodb-flush-log-at-trx-commit = 1
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 40G

我在进行这些更改后重新启动了mysql。它仍然抛出异常。我的服务器有12个内核和48GB Ram，我可以将此服务器专门用于此分区过程。是否有任何建议绕过此异常（超过锁定总数）？

Answer 1

如果您可以将此服务器专用于分区，则在分区之前使用LOCK TABLES锁定整个表。另请参阅https://stackoverflow.com/a/7066272/3182500

即使在增加缓冲池大小之后，锁的总数也超过了锁表大小

1 个答案: