我有一个基于 Mysql (MyIsam) 的 cs-cart 安装，大约有 3,000 个项目，数据库大小为 700MB，索引大小为 247MB。在上个月，由于某种原因，我不知道性能下降并且非常不稳定。我像往常一样优化了数据库，并尝试根据我在互联网上找到的一些建议来更改一些 Mysql 变量。
专用服务器相当老 Cpu 双核 奔腾 E2180 6GB RAM 160GB SATA
这是顶部命令的屏幕截图
auto_increment_increment
1
auto_increment_offset
1
automatic_sp_privileges
ON
back_log
50
basedir
/usr/
bdb_cache_size
8384512
bdb_home
/var/lib/mysql/
bdb_log_buffer_size
262144
bdb_logdir
bdb_max_lock
10000
bdb_shared_data
OFF
bdb_tmpdir
/tmp/
binlog_cache_size
32768
bulk_insert_buffer_size
8388608
character_set_client
utf8
character_set_connection
utf8
character_set_database
latin1
character_set_filesystem
binary
character_set_results
utf8
character_set_server
latin1
character_set_system
utf8
character_sets_dir
/usr/share/mysql/charsets/
collation_connection
utf8_general_ci
collation_database
latin1_swedish_ci
collation_server
latin1_swedish_ci
completion_type
0
concurrent_insert
1
connect_timeout
10
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
0
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
NO
have_bdb
YES
have_blackhole_engine
NO
have_compress
YES
have_community_features
YES
have_profiling
YES
have_crypt
YES
have_csv
NO
have_dynamic_loading
YES
have_example_engine
NO
have_federated_engine
NO
have_geometry
YES
have_innodb
YES
have_isam
NO
have_merge_engine
YES
have_ndbcluster
NO
have_openssl
DISABLED
have_ssl
DISABLED
have_query_cache
YES
have_raid
NO
have_rtree_keys
YES
have_symlink
YES
hostname
ltfs676.aus.us.siteprotect.com
init_connect
init_file
init_slave
innodb_additional_mem_pool_size
1048576
innodb_autoextend_increment
8
innodb_buffer_pool_awe_mem_mb
0
innodb_buffer_pool_size
8388608
innodb_checksums
ON
innodb_commit_concurrency
0
innodb_concurrency_tickets
500
innodb_data_file_path
ibdata1:10M:autoextend
innodb_data_home_dir
innodb_adaptive_hash_index
ON
innodb_doublewrite
ON
innodb_fast_shutdown
1
innodb_file_io_threads
4
innodb_file_per_table
OFF
innodb_flush_log_at_trx_commit
1
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
1048576
innodb_log_file_size
5242880
innodb_log_files_in_group
2
innodb_log_group_home_dir
./
innodb_max_dirty_pages_pct
90
Variable_name
Value
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
innodb_use_legacy_cardinality_algorithm
ON
interactive_timeout
28800
join_buffer_size
131072
key_buffer_size
367001600
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
OFF
locked_in_memory
OFF
log
OFF
log_bin
OFF
log_bin_trust_function_creators
OFF
log_error
/var/log/mysqld.log
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
1048576
max_binlog_cache_size
4294963200
max_binlog_size
1073741824
max_connect_errors
10
max_connections
100
max_delayed_threads
20
max_error_count
64
max_heap_table_size
16777216
max_insert_delayed_threads
20
max_join_size
4294967295
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
50
max_write_lock_count
4294967295
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
net_buffer_length
16384
net_read_timeout
30
net_retry_count
10
net_write_timeout
60
new
OFF
old_passwords
OFF
open_files_limit
20000
optimizer_prune_level
1
optimizer_search_depth
62
pid_file
/var/run/mysqld/mysqld.pid
plugin_dir
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
0
query_cache_type
ON
query_cache_wlock_invalidate
OFF
query_prealloc_size
8192
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
rpl_recovery_rank
0
secure_auth
OFF
secure_file_priv
server_id
0
skip_external_locking
ON
Variable_name
Value
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/lib/mysql/mysql.sock
sort_buffer_size
2097144
sql_big_selects
ON
sql_mode
sql_notes
ON
sql_warnings
OFF
ssl_ca
ssl_capath
ssl_cert
ssl_cipher
ssl_key
storage_engine
MyISAM
sync_binlog
0
sync_frm
ON
system_time_zone
CDT
table_cache
64
table_lock_wait_timeout
50
table_type
MyISAM
thread_cache_size
0
thread_stack
196608
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
5.0.95
version_bdb
Sleepycat Software: Berkeley DB 4.1.24: (December ...
version_comment
Source distribution
version_compile_machine
i386
version_compile_os
redhat-linux-gnu
wait_timeout
28800
有人可以帮我调整系统吗？