我已经将我的drupal站点从一台mysql服务器移至另一台。旧机器有1个CPU,1GB内存 新机器有4个CPU,4GB内存。MySQL性能查询
我对性能比较此查询(2分钟对2秒)
select distinct c.client
from client_table c
LEFT JOIN reps r on (c.client = r.client)
where r.user_id is NULL
AND c.client not in (select distinct client from billing where first_purchase = 1)
NEW OLD
| connect_timeout 10 |connect_timeout 5
| have_federated_engine DISABLED | have_federated_engine YES
| max_connections 100 | max_connections 400
| max_seeks_for_key 18446744073709551615 | max_seeks_for_key 4294967295
| max_write_lock_count 18446744073709551615 | max_write_lock_count 4294967295
| myisam_max_sort_file_size 9223372036853727232 | myisam_max_sort_file_size 2147483647
| max_binlog_cache_size 18446744073709547520 | max_binlog_cache_size 4294967295
| myisam_recover_options BACKUP | myisam_recover_options OFF
| range_alloc_block_size 4096 | range_alloc_block_size 2048
| table_cache 457 | table_cache 307
| version 5.0.67-0ubuntu6-log | version 5.0.51a-3ubuntu5.4-log
| version_compile_machine x86_64 | version_compile_machine i486
ONLY on NEW | relay_log |
ONLY on NEW | relay_log_index |
ONLY on NEW | relay_log_info_file | relay-log.info
ONLY on NEW innodb_adaptive_hash_index | ON
如何确定是什么原因造成的问题或如何解决它的任何想法巨大的负面区别?
你比较了解释吗? – 2009-09-29 17:20:39
我可以试试。尽管它可能会导致我的网站停止。 – 2009-09-29 17:25:13