debian升级mysql5.0.51a-24+lenny4-log至5.1.56版，用老的配置文件，查询速度变慢1倍……

附上两个版本的“show global variables”
5.0.51a的：
+---------------------------------+-----------------------------+
| Variable_name                   | Value                       |
+---------------------------------+-----------------------------+
| auto_increment_increment        | 1                           |
| auto_increment_offset           | 1                           |
| automatic_sp_privileges         | ON                          |
| back_log                        | 50                          |
| basedir                         | /usr/                       |
| binlog_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/  |
| collation_connection            | latin1_swedish_ci           |
| collation_database              | latin1_swedish_ci           |
| collation_server                | latin1_swedish_ci           |
| completion_type                 | 0                           |
| concurrent_insert               | 1                           |
| connect_timeout                 | 5                           |
| datadir                         | /var/lib/mysql/             |
| date_format                     | %Y-%m-%d                    |
| datetime_format                 | %Y-%m-%d %H:%i:%s           |
| default_week_format             | 0                           |
| delay_key_write                 | ON                          |
| delayed_insert_limit            | 100                         |
| delayed_insert_timeout          | 300                         |
| delayed_queue_size              | 1000                        |
| div_precision_increment         | 4                           |
| keep_files_on_create            | OFF                         |
| engine_condition_pushdown       | OFF                         |
| expire_logs_days                | 10                          |
| flush                           | OFF                         |
| flush_time                      | 0                           |
| ft_boolean_syntax               | + -><()~*:""&|              |
| ft_max_word_len                 | 84                          |
| ft_min_word_len                 | 4                           |
| ft_query_expansion_limit        | 20                          |
| ft_stopword_file                | (built-in)                  |
| group_concat_max_len            | 1024                        |
| have_archive                    | YES                         |
| have_bdb                        | NO                          |
| have_blackhole_engine           | YES                         |
| have_compress                   | YES                         |
| have_crypt                      | YES                         |
| have_csv                        | YES                         |
| have_dynamic_loading            | YES                         |
| have_example_engine             | NO                          |
| have_federated_engine           | YES                         |
| have_geometry                   | YES                         |
| have_innodb                     | YES                         |
| have_isam                       | NO                          |
| have_merge_engine               | YES                         |
| have_ndbcluster                 | DISABLED                    |
| have_openssl                    | DISABLED                    |
| have_ssl                        | DISABLED                    |
| have_query_cache                | YES                         |
| have_raid                       | NO                          |
| have_rtree_keys                 | YES                         |
| have_symlink                    | YES                         |
| hostname                        | eChance                     |
| init_connect                    |                             |
| init_file                       |                             |
| init_slave                      |                             |
| innodb_additional_mem_pool_size | 8388608                     |
| innodb_autoextend_increment     | 100                         |
| innodb_buffer_pool_awe_mem_mb   | 0                           |
| innodb_buffer_pool_size         | 16777216                    |
| innodb_checksums                | ON                          |
| innodb_commit_concurrency       | 0                           |
| innodb_concurrency_tickets      | 500                         |
| innodb_data_file_path           | ibdata1:10M:autoextend      |
| innodb_data_home_dir            |                             |
| innodb_doublewrite              | ON                          |
| innodb_fast_shutdown            | 1                           |
| innodb_file_io_threads          | 4                           |
| innodb_file_per_table           | OFF                         |
| innodb_flush_log_at_trx_commit  | 0                           |
| innodb_flush_method             |                             |
| innodb_force_recovery           | 0                           |
| innodb_lock_wait_timeout        | 50                          |
| innodb_locks_unsafe_for_binlog  | OFF                         |
| innodb_log_arch_dir             |                             |
| innodb_log_archive              | OFF                         |
| innodb_log_buffer_size          | 8388608                     |
| innodb_log_file_size            | 10485760                    |
| innodb_log_files_in_group       | 2                           |
| innodb_log_group_home_dir       | ./                          |
| innodb_max_dirty_pages_pct      | 90                          |
| innodb_max_purge_lag            | 0                           |
| innodb_mirrored_log_groups      | 1                           |
| innodb_open_files               | 300                         |
| innodb_rollback_on_timeout      | OFF                         |
| innodb_support_xa               | ON                          |
| innodb_sync_spin_loops          | 20                          |
| innodb_table_locks              | ON                          |
| innodb_thread_concurrency       | 8                           |
| innodb_thread_sleep_delay       | 10000                       |
| interactive_timeout             | 28800                       |
| join_buffer_size                | 131072                      |
| key_buffer_size                 | 16777216                    |
| key_cache_age_threshold         | 300                         |
| key_cache_block_size            | 1024                        |
| key_cache_division_limit        | 100                         |
| language                        | /usr/share/mysql/english/   |
| large_files_support             | ON                          |
| large_page_size                 | 0                           |
| large_pages                     | OFF                         |
| lc_time_names                   | en_US                       |
| license                         | GPL                         |
| local_infile                    | ON                          |
| locked_in_memory                | OFF                         |
| log                             | OFF                         |
| log_bin                         | ON                          |
| log_bin_trust_function_creators | ON                          |
| log_error                       |                             |
| log_queries_not_using_indexes   | OFF                         |
| log_slave_updates               | OFF                         |
| log_slow_queries                | OFF                         |
| log_warnings                    | 1                           |
| long_query_time                 | 10                          |
| low_priority_updates            | OFF                         |
| lower_case_file_system          | OFF                         |
| lower_case_table_names          | 0                           |

| max_allowed_packet              | 16776192                    |
| max_binlog_cache_size           | 4294967295                  |
| max_binlog_size                 | 1048576000                  |
| max_connect_errors              | 10                          |
| max_connections                 | 10000                       |
| max_delayed_threads             | 20                          |
| max_error_count                 | 64                          |
| max_heap_table_size             | 16777216                    |
| max_insert_delayed_threads      | 20                          |
| max_join_size                   | 18446744073709551615        |
| max_length_for_sort_data        | 1024                        |
| max_prepared_stmt_count         | 16382                       |
| max_relay_log_size              | 0                           |
| max_seeks_for_key               | 4294967295                  |
| max_sort_length                 | 1024                        |
| max_sp_recursion_depth          | 0                           |
| max_tmp_tables                  | 32                          |
| max_user_connections            | 0                           |
| max_write_lock_count            | 4294967295                  |
| multi_range_count               | 256                         |
| myisam_data_pointer_size        | 6                           |
| myisam_max_sort_file_size       | 2147483647                  |
| myisam_recover_options          | OFF                         |
| myisam_repair_threads           | 1                           |
| myisam_sort_buffer_size         | 8388608                     |
| myisam_stats_method             | nulls_unequal               |
| ndb_autoincrement_prefetch_sz   | 32                          |
| ndb_force_send                  | ON                          |
| ndb_use_exact_count             | ON                          |
| ndb_use_transactions            | ON                          |
| ndb_cache_check_time            | 0                           |
| ndb_connectstring               |                             |
| net_buffer_length               | 16384                       |
| net_read_timeout                | 30                          |
| net_retry_count                 | 10                          |
| net_write_timeout               | 60                          |
| new                             | OFF                         |
| old_passwords                   | OFF                         |
| open_files_limit                | 50000                       |
| optimizer_prune_level           | 1                           |
| optimizer_search_depth          | 62                          |
| pid_file                        | /var/run/mysqld/mysqld.pid  |
| port                            | 3306                        |
| preload_buffer_size             | 32768                       |
| profiling                       | OFF                         |
| profiling_history_size          | 15                          |
| protocol_version                | 10                          |
| query_alloc_block_size          | 8192                        |
| query_cache_limit               | 1048576                     |
| query_cache_min_res_unit        | 4096                        |
| query_cache_size                | 16777216                    |
| query_cache_type                | ON                          |
| query_cache_wlock_invalidate    | OFF                         |
| query_prealloc_size             | 8192                        |
| range_alloc_block_size          | 2048                        |
| read_buffer_size                | 131072                      |
| read_only                       | OFF                         |
| read_rnd_buffer_size            | 262144                      |
| relay_log_purge                 | ON                          |
| relay_log_space_limit           | 0                           |
| rpl_recovery_rank               | 0                           |
| secure_auth                     | OFF                         |
| secure_file_priv                |                             |
| server_id                       | 1                           |
| skip_external_locking           | ON                          |
| skip_networking                 | OFF                         |
| skip_show_database              | OFF                         |
| slave_compressed_protocol       | OFF                         |
| slave_load_tmpdir               | /tmp/                       |
| slave_net_timeout               | 3600                        |
| slave_skip_errors               | OFF                         |
| slave_transaction_retries       | 10                          |
| slow_launch_time                | 2                           |
| socket                          | /var/run/mysqld/mysqld.sock |
| sort_buffer_size                | 2097144                     |
| sql_big_selects                 | ON                          |
| sql_mode                        | NO_AUTO_VALUE_ON_ZERO       |
| sql_notes                       | ON                          |
| sql_warnings                    | OFF                         |
| ssl_ca                          |                             |
| ssl_capath                      |                             |
| ssl_cert                        |                             |
| ssl_cipher                      |                             |
| ssl_key                         |                             |
| storage_engine                  | InnoDB                      |
| sync_binlog                     | 0                           |
| sync_frm                        | ON                          |
| system_time_zone                | CST                         |
| table_cache                     | 64                          |
| table_lock_wait_timeout         | 50                          |
| table_type                      | InnoDB                      |
| thread_cache_size               | 8                           |
| thread_stack                    | 131072                      |
| time_format                     | %H:%i:%s                    |
| time_zone                       | SYSTEM                      |
| timed_mutexes                   | OFF                         |
| tmp_table_size                  | 33554432                    |
| tmpdir                          | /tmp                        |
| transaction_alloc_block_size    | 8192                        |
| transaction_prealloc_size       | 4096                        |
| tx_isolation                    | REPEATABLE-READ             |
| updatable_views_with_limit      | YES                         |
| version                         | 5.0.51a-24+lenny4-log       |
| version_comment                 | (Debian)                    |
| version_compile_machine         | i486                        |
| version_compile_os              | debian-linux-gnu            |
| wait_timeout                    | 28800                       |
+---------------------------------+-----------------------------+

5.1.56的：
Variable_name Value
auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
back_log 50
basedir /usr/local/mysql-5.1.56-linux-i686-glibc23/
big_tables OFF
binlog_cache_size 32768
binlog_direct_non_transactional_updates OFF
binlog_format STATEMENT
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/local/mysql-5.1.56-linux-i686-glibc23/share/charsets/
collation_connection latin1_swedish_ci
collation_database latin1_swedish_ci
collation_server latin1_swedish_ci
completion_type 0
concurrent_insert 1
connect_timeout 5
datadir /var/lib/mysql/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
div_precision_increment 4
engine_condition_pushdown OFF
error_count 0
event_scheduler OFF
expire_logs_days 10
flush OFF
flush_time 0
foreign_key_checks ON
ft_boolean_syntax + -><()~*:""&|
ft_max_word_len 84
ft_min_word_len 4
ft_query_expansion_limit 20
ft_stopword_file (built-in)
general_log OFF
general_log_file /var/run/mysqld/mysqld.log
group_concat_max_len 1024
have_community_features YES
have_compress YES
have_crypt YES
have_csv YES
have_dynamic_loading YES
have_geometry YES
have_innodb YES
have_ndbcluster NO
have_openssl DISABLED
have_partitioning YES
have_query_cache YES
have_rtree_keys YES
have_ssl DISABLED
have_symlink YES
hostname eChance
identity 0
ignore_builtin_innodb OFF
init_connect
init_file
init_slave
innodb_adaptive_hash_index ON
innodb_additional_mem_pool_size 8388608
innodb_autoextend_increment 100
innodb_autoinc_lock_mode 1
innodb_buffer_pool_size 16777216
innodb_checksums ON
innodb_commit_concurrency 0
innodb_concurrency_tickets 500
innodb_data_file_path ibdata1:10M:autoextend
innodb_data_home_dir
innodb_doublewrite ON
innodb_fast_shutdown 1
innodb_file_io_threads 4
innodb_file_per_table OFF
innodb_flush_log_at_trx_commit 0
innodb_flush_method
innodb_force_recovery 0
innodb_lock_wait_timeout 50
innodb_locks_unsafe_for_binlog OFF
innodb_log_buffer_size 8388608
innodb_log_file_size 10485760
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_max_dirty_pages_pct 90
innodb_max_purge_lag 0
innodb_mirrored_log_groups 1
innodb_open_files 300
innodb_rollback_on_timeout OFF
innodb_stats_method nulls_equal
innodb_stats_on_metadata ON
innodb_support_xa ON
innodb_sync_spin_loops 20
innodb_table_locks ON
innodb_thread_concurrency 8
innodb_thread_sleep_delay 10000
innodb_use_legacy_cardinality_algorithm ON
insert_id 0
interactive_timeout 28800
join_buffer_size 131072
keep_files_on_create OFF
key_buffer_size 16777216
key_cache_age_threshold 300
key_cache_block_size 1024
key_cache_division_limit 100
language /usr/local/mysql-5.1.56-linux-i686-glibc23/share/english/
large_files_support ON
large_page_size 0
large_pages OFF
last_insert_id 0
lc_time_names en_US
license GPL
local_infile ON
locked_in_memory OFF
log OFF
log_bin ON
log_bin_trust_function_creators ON
log_bin_trust_routine_creators ON
log_error /var/lib/mysql/eChance.err
log_output FILE
log_queries_not_using_indexes OFF
log_slave_updates OFF
log_slow_queries OFF
log_warnings 1
long_query_time 10.000000
low_priority_updates OFF
lower_case_file_system OFF
lower_case_table_names 0
max_allowed_packet 16777216
max_binlog_cache_size 4294963200
max_binlog_size 1048576000
max_connect_errors 10
max_connections 10000
max_delayed_threads 20
max_error_count 64
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 1024
max_prepared_stmt_count 16382
max_relay_log_size 0
max_seeks_for_key 4294967295
max_sort_length 1024
max_sp_recursion_depth 0
max_tmp_tables 32
max_user_connections 0
max_write_lock_count 4294967295
min_examined_row_limit 0
multi_range_count 256
myisam_data_pointer_size 6
myisam_max_sort_file_size 2146435072
myisam_mmap_size 4294967295
myisam_recover_options OFF
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
old OFF
old_alter_table OFF
old_passwords OFF
open_files_limit 50000
optimizer_prune_level 1
optimizer_search_depth 62
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on
pid_file /var/run/mysqld/mysqld.pid
plugin_dir /usr/local/mysql-5.1.56-linux-i686-glibc23/lib/plugin
port 3306
preload_buffer_size 32768
profiling OFF
profiling_history_size 15
protocol_version 10
pseudo_thread_id 0
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_min_res_unit 4096
query_cache_size 16777216
query_cache_type ON
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
rand_seed1
rand_seed2
range_alloc_block_size 4096
read_buffer_size 131072
read_only OFF
read_rnd_buffer_size 262144
relay_log
relay_log_index
relay_log_info_file relay-log.info
relay_log_purge ON
relay_log_space_limit 0
report_host
report_password
report_port 3306
report_user
rpl_recovery_rank 0
secure_auth OFF
secure_file_priv
server_id 1
skip_external_locking ON
skip_name_resolve OFF
skip_networking OFF
skip_show_database OFF
slave_compressed_protocol OFF
slave_exec_mode STRICT
slave_load_tmpdir /tmp
slave_net_timeout 3600
slave_skip_errors OFF
slave_transaction_retries 10
slow_launch_time 2
slow_query_log OFF
slow_query_log_file /var/run/mysqld/mysqld-slow.log
socket /var/run/mysqld/mysqld.sock
sort_buffer_size 2097144
sql_auto_is_null ON
sql_big_selects ON
sql_big_tables OFF
sql_buffer_result OFF
sql_log_bin ON
sql_log_off OFF
sql_log_update ON
sql_low_priority_updates OFF
sql_max_join_size 18446744073709551615
sql_mode NO_AUTO_VALUE_ON_ZERO
sql_notes ON
sql_quote_show_create ON
sql_safe_updates OFF
sql_select_limit 18446744073709551615
sql_slave_skip_counter
sql_warnings OFF
ssl_ca
ssl_capath
ssl_cert
ssl_cipher
ssl_key
storage_engine InnoDB
sync_binlog 0
sync_frm ON
system_time_zone CST
table_definition_cache 256
table_lock_wait_timeout 50
table_open_cache 64
table_type InnoDB
thread_cache_size 8
thread_handling one-thread-per-connection
thread_stack 196608
time_format %H:%i:%s
time_zone SYSTEM
timed_mutexes OFF
timestamp 1306140708
tmp_table_size 33554432
tmpdir /tmp
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
tx_isolation REPEATABLE-READ
unique_checks ON
updatable_views_with_limit YES
version 5.1.56-log
version_comment MySQL Community Server (GPL)
version_compile_machine i686
version_compile_os pc-linux-gnu
wait_timeout 28800
warning_count 0

有人能帮忙吗？原因就出在type，老版本是range，新版本是index，肯定index会慢，不过可能由于误认为用index会让rows减少很多，所以就用的index，不过这是一个错误的判断啊…
如果在table_log_http_sum后面加上FORCE INDEX (m_date)就会一样快了
表的查询语句：
SELECT SQL_CALC_FOUND_ROWS table_log_http_sum.site_id AS site_id, COUNT(DISTINCT table_log_http_sum.object_user_id) AS user_count, SUM(m_requests) AS log_count, SUM(m_accepts) AS log_count_allow FROM table_log_http_sum WHERE table_log_http_sum.m_date BETWEEN 1304179200 AND 1305820801 AND table_log_http_sum.type = 1 GROUP BY table_log_http_sum.site_id ORDER BY table_log_http_sum.site_id ASC  LIMIT 16 OFFSET 0;建表语句：
table_log_http_sum | CREATE TABLE `table_log_http_sum` (
  `m_date` int(11) default NULL,
  `type` int(11) default NULL,
  `m_hour` int(11) default NULL,
  `object_user_id` int(11) default NULL,
  `site_id` int(11) default NULL,
  `m_type` bigint(20) default '0',
  `m_type_str` varchar(1000) default '',
  `m_requests` int(11) default NULL,
  `m_accepts` int(11) default NULL,
  `up_data_size` bigint(20) default NULL,
  `down_data_size` bigint(20) default NULL,
  UNIQUE KEY `m_date` (`m_date`,`type`,`m_hour`,`object_user_id`,`site_id`),
  KEY `type` (`type`),
  KEY `m_hour` (`m_hour`),
  KEY `object_user_id` (`object_user_id`),
  KEY `site_id` (`site_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1

调试易

debian升级mysql5.0.51a-24+lenny4-log至5.1.56版，用老的配置文件，查询速度变慢1倍……

解决方案 »