这个mysql查询运行了大约10个小时,但还没有完成.有些事情是可怕的错误.
这里有两个表(文本和垃圾邮件).垃圾邮件将垃圾邮件的ID存储在我要删除的文本中.
DELETE FROM tname.text WHERE old_id IN (SELECT textid FROM spam);
垃圾邮件只有2列,都是整数.800K条目的文件大小为几Mbs.两个int都是主键.
文本有3列.id(prim键),文本,标志.大约1200K条目,大约2.1千兆字节(大多数垃圾邮件).
服务器是一个至强四核,2千兆字节的ram(不要问我为什么).只有apache(为什么？)和mysqld正在运行.它是一个旧的免费bsd和mysql 4.1.2(不要问我为什么)
主题:6个问题:188805慢查询:318打开:810刷新表:1打开表:157每秒查询数:7.532
Mysql my.cnf:
[mysqld]
datadir=/usr/local/mysql
log-error=/usr/local/mysql/mysqld.err
pid-file=/usr/local/mysql/mysqld.pid
tmpdir=/var/tmp
innodb_data_home_dir =
innodb_log_files_in_group = 2
join_buffer_size=2M
key_buffer_size=32M
max_allowed_packet=1M
max_connections=800
myisam_sort_buffer_size=32M
query_cache_size=8M
read_buffer_size=2M
sort_buffer_size=2M
table_cache=256
skip-bdb
log-slow-queries = slow.log
long_query_time = 1
#skip-innodb
#default-table-type=innodb
innodb_data_file_path = /usr/local/mysql/ibdata1:10M:autoextend
innodb_log_group_home_dir = /usr/local/mysql/
innodb_buffer_pool_size = 128M
innodb_log_file_size = 16M
innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit=1
#innodb_additional_mem_pool_size=1M
#innodb_lock_wait_timeout=50
log-bin
server-id=201
[isamchk]
key_buffer_size=128M
read_buffer_size=128M
write_buffer_size=128M
sort_buffer_size=128M
[myisamchk]
key_buffer_size=128M[server:~] dmesg | grep memory
real memory …