Hi Christian - thanks for posting that. I see you are making excellent use of the query cache; also your thread_cache is working well, seems that 30 is about the right number.
You have a high number of connections, by my calculations about 15 per second. (connection / uptime, or 46944092/3052131 = 15.38) I would think that is introducing a fair bit of overhead for you - you might consider persistent connections as a possible improvement. Other than that, are your using InnoDB or MyISAM tables, or a mix? Your key_buffer_size is just 512 MB, and your innodb_buffer_pool is just 400 MB. I'd suggest reading the optimization portions of the online manual, and/or Jeremy Zawodny's "High Performance MySQL", and start adjusting these cache settings. Seems like you're likely just not using all your RAM. If you have a large dataset, then you may well be disk-bound right now, which explains your low CPU utilization. I think Miles' comment was spot-on as well - without superfast subsystems (disk, network) and lots of RAM (and MySQL configured to use it), 16 logical CPUs or even 8 real CPU cores will be hard to keep busy. Dan On 8/22/06, Christian Hammers <[EMAIL PROTECTED]> wrote:
Hallo
On Tue, Aug 22, 2006 at 09:25:09AM -0500, Dan Buettner wrote:
> Christian, can you post the output of
> SHOW STATUS
> and
> SHOW VARIABLES
> please?
>
> This will tell us how your server is configured, and how it has been
> running. It's possible you're not set up to best utilize your CPU
> power or memory.
>
> Dan
Ok, is below...
bye,
-christian-
ql> SHOW STATUS;
+----------------------------+-------------+
| Variable_name | Value |
+----------------------------+-------------+
| Aborted_clients | 14213 |
| Aborted_connects | 40917 |
| Binlog_cache_disk_use | 0 |
| Binlog_cache_use | 0 |
| Bytes_received | 1368241082 |
| Bytes_sent | 707048892 |
| Com_admin_commands | 72 |
| Com_alter_db | 0 |
| Com_alter_table | 105 |
| Com_analyze | 0 |
| Com_backup_table | 0 |
| Com_begin | 0 |
| Com_change_db | 55932940 |
| Com_change_master | 0 |
| Com_check | 0 |
| Com_checksum | 0 |
| Com_commit | 6 |
| Com_create_db | 0 |
| Com_create_function | 0 |
| Com_create_index | 0 |
| Com_create_table | 295408 |
| Com_dealloc_sql | 0 |
| Com_delete | 1836616 |
| Com_delete_multi | 26 |
| Com_do | 0 |
| Com_drop_db | 0 |
| Com_drop_function | 0 |
| Com_drop_index | 0 |
| Com_drop_table | 12 |
| Com_drop_user | 0 |
| Com_execute_sql | 0 |
| Com_flush | 211 |
| Com_grant | 0 |
| Com_ha_close | 0 |
| Com_ha_open | 0 |
| Com_ha_read | 0 |
| Com_help | 0 |
| Com_insert | 931845 |
| Com_insert_select | 1711 |
| Com_kill | 1 |
| Com_load | 0 |
| Com_load_master_data | 0 |
| Com_load_master_table | 0 |
| Com_lock_tables | 105666 |
| Com_optimize | 0 |
| Com_preload_keys | 0 |
| Com_prepare_sql | 0 |
| Com_purge | 0 |
| Com_purge_before_date | 0 |
| Com_rename_table | 0 |
| Com_repair | 0 |
| Com_replace | 441063 |
| Com_replace_select | 0 |
| Com_reset | 0 |
| Com_restore_table | 0 |
| Com_revoke | 0 |
| Com_revoke_all | 0 |
| Com_rollback | 6736766 |
| Com_savepoint | 0 |
| Com_select | 775425766 |
| Com_set_option | 14218713 |
| Com_show_binlog_events | 0 |
| Com_show_binlogs | 35 |
| Com_show_charsets | 0 |
| Com_show_collations | 177479 |
| Com_show_column_types | 0 |
| Com_show_create_db | 0 |
| Com_show_create_table | 107234 |
| Com_show_databases | 186 |
| Com_show_errors | 0 |
| Com_show_fields | 243305 |
| Com_show_grants | 0 |
| Com_show_innodb_status | 0 |
| Com_show_keys | 478 |
| Com_show_logs | 0 |
| Com_show_master_status | 0 |
| Com_show_ndb_status | 0 |
| Com_show_new_master | 0 |
| Com_show_open_tables | 0 |
| Com_show_privileges | 0 |
| Com_show_processlist | 162274 |
| Com_show_slave_hosts | 0 |
| Com_show_slave_status | 0 |
| Com_show_status | 87704 |
| Com_show_storage_engines | 0 |
| Com_show_tables | 214232 |
| Com_show_variables | 177525 |
| Com_show_warnings | 0 |
| Com_slave_start | 0 |
| Com_slave_stop | 0 |
| Com_stmt_close | 0 |
| Com_stmt_execute | 0 |
| Com_stmt_prepare | 0 |
| Com_stmt_reset | 0 |
| Com_stmt_send_long_data | 0 |
| Com_truncate | 0 |
| Com_unlock_tables | 105666 |
| Com_update | 4112919 |
| Com_update_multi | 0 |
| Connections | 46944092 |
| Created_tmp_disk_tables | 67475927 |
| Created_tmp_files | 16 |
| Created_tmp_tables | 94929842 |
| Delayed_errors | 0 |
| Delayed_insert_threads | 0 |
| Delayed_writes | 0 |
| Flush_commands | 36 |
| Handler_commit | 643 |
| Handler_delete | 693892 |
| Handler_discover | 0 |
| Handler_read_first | 51124076 |
| Handler_read_key | 1153681762 |
| Handler_read_next | 671025235 |
| Handler_read_prev | 26 |
| Handler_read_rnd | 1026161472 |
| Handler_read_rnd_next | 3147190869 |
| Handler_rollback | 3438 |
| Handler_update | 11968522 |
| Handler_write | 3755229543 |
| Key_blocks_not_flushed | 0 |
| Key_blocks_unused | 457935 |
| Key_blocks_used | 12114 |
| Key_read_requests | 47686860251 |
| Key_reads | 2502600 |
| Key_write_requests | 183855438 |
| Key_writes | 5911607 |
| Max_used_connections | 301 |
| Not_flushed_delayed_rows | 0 |
| Open_files | 1821 |
| Open_streams | 0 |
| Open_tables | 1500 |
| Opened_tables | 91131 |
| Qcache_free_blocks | 23320 |
| Qcache_free_memory | 126924656 |
| Qcache_hits | 1556527251 |
| Qcache_inserts | 44008838 |
| Qcache_lowmem_prunes | 2433319 |
| Qcache_not_cached | 731729185 |
| Qcache_queries_in_cache | 89607 |
| Qcache_total_blocks | 202675 |
| Questions | 2467806863 |
| Rpl_status | NULL |
| Select_full_join | 612 |
| Select_full_range_join | 334541 |
| Select_range | 645667 |
| Select_range_check | 0 |
| Select_scan | 3714939 |
| Slave_open_temp_tables | 0 |
| Slave_retried_transactions | 0 |
| Slave_running | OFF |
| Slow_launch_threads | 0 |
| Slow_queries | 3693 |
| Sort_merge_passes | 6 |
| Sort_range | 144287505 |
| Sort_rows | 1953033508 |
| Sort_scan | 46933742 |
| Table_locks_immediate | 2904489553 |
| Table_locks_waited | 11199009 |
| Threads_cached | 24 |
| Threads_connected | 16 |
| Threads_created | 30104 |
| Threads_running | 3 |
| Uptime | 3052131 |
+----------------------------+-------------+
163 rows in set (0.00 sec)
mysql> SHOW VARIABLES;
+---------------------------------+--------------------------------------------------------+
| Variable_name | Value
|
+---------------------------------+--------------------------------------------------------+
| back_log | 50
|
| basedir | /usr/
|
| bdb_cache_size | 8388600
|
| bdb_home |
|
| bdb_log_buffer_size | 0
|
| bdb_logdir |
|
| bdb_max_lock | 10000
|
| bdb_shared_data | OFF
|
| bdb_tmpdir |
|
| binlog_cache_size | 32768
|
| bulk_insert_buffer_size | 8388608
|
| character_set_client | latin1
|
| character_set_connection | latin1
|
| character_set_database | latin1
|
| 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
|
| concurrent_insert | ON
|
| 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
|
| 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 | YES
|
| have_bdb | DISABLED
|
| have_blackhole_engine | NO
|
| have_compress | YES
|
| have_crypt | YES
|
| have_csv | YES
|
| have_example_engine | NO
|
| have_geometry | YES
|
| have_innodb | YES
|
| have_isam | YES
|
| have_ndbcluster | DISABLED
|
| have_openssl | NO
|
| have_query_cache | YES
|
| have_raid | YES
|
| have_rtree_keys | YES
|
| have_symlink | YES
|
| init_connect |
|
| init_file |
|
| init_slave |
|
| innodb_additional_mem_pool_size | 10485760
|
| innodb_autoextend_increment | 8
|
| innodb_buffer_pool_awe_mem_mb | 0
|
| innodb_buffer_pool_size | 419430400
|
| innodb_data_file_path |
/var/lib/mysql/tablespace1.innodb:1024M:autoextend |
| innodb_data_home_dir |
|
| innodb_fast_shutdown | ON
|
| 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 | 8388608
|
| innodb_log_file_size | 268435456
|
| innodb_log_files_in_group | 2
|
| innodb_log_group_home_dir | /var/lib/mysql/
|
| innodb_max_dirty_pages_pct | 90
|
| innodb_max_purge_lag | 0
|
| innodb_mirrored_log_groups | 1
|
| innodb_open_files | 300
|
| innodb_table_locks | ON
|
| innodb_thread_concurrency | 8
|
| interactive_timeout | 28800
|
| join_buffer_size | 131072
|
| key_buffer_size | 536870912
|
| key_cache_age_threshold | 300
|
| key_cache_block_size | 1024
|
| key_cache_division_limit | 100
|
| language | /usr/share/mysql/english/
|
| large_files_support | ON
|
| license | GPL
|
| local_infile | ON
|
| locked_in_memory | OFF
|
| log | OFF
|
| log_bin | OFF
|
| log_error |
|
| log_slave_updates | OFF
|
| log_slow_queries | ON
|
| log_update | 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 | 1073741824
|
| max_connect_errors | 10000
|
| max_connections | 300
|
| 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_tmp_tables | 32
|
| max_user_connections | 0
|
| max_write_lock_count | 4294967295
|
| myisam_data_pointer_size | 4
|
| myisam_max_extra_sort_file_size | 2147483648
|
| myisam_max_sort_file_size | 2147483647
|
| myisam_recover_options | OFF
|
| myisam_repair_threads | 1
|
| myisam_sort_buffer_size | 33554432
|
| myisam_stats_method | nulls_unequal
|
| ndb_autoincrement_prefetch_sz | 32
|
| ndb_force_send | ON
|
| ndb_use_exact_count | ON
|
| ndb_use_transactions | ON
|
| net_buffer_length | 16384
|
| net_read_timeout | 30
|
| net_retry_count | 10
|
| net_write_timeout | 60
|
| new | OFF
|
| old_passwords | ON
|
| open_files_limit | 65535
|
| pid_file | /var/run/mysqld/mysqld.pid
|
| port | 3306
|
| preload_buffer_size | 32768
|
| prepared_stmt_count | 0
|
| protocol_version | 10
|
| query_alloc_block_size | 8192
|
| query_cache_limit | 8388608
|
| query_cache_min_res_unit | 4096
|
| query_cache_size | 268435456
|
| 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
|
| server_id | 0
|
| skip_external_locking | ON
|
| skip_networking | OFF
|
| skip_show_database | OFF
|
| slave_net_timeout | 3600
|
| slave_transaction_retries | 0
|
| slow_launch_time | 2
|
| socket | /var/run/mysqld/mysqld.sock
|
| sort_buffer_size | 2097144
|
| sql_mode |
|
| sql_notes | ON
|
| sql_warnings | ON
|
| storage_engine | MyISAM
|
| sync_binlog | 0
|
| sync_frm | ON
|
| sync_replication | 0
|
| sync_replication_slave_id | 0
|
| sync_replication_timeout | 0
|
| system_time_zone | CEST
|
| table_cache | 1500
|
| table_type | MyISAM
|
| thread_cache_size | 30
|
| thread_stack | 131072
|
| time_format | %H:%i:%s
|
| time_zone | SYSTEM
|
| tmp_table_size | 33554432
|
| tmpdir | /tmp
|
| transaction_alloc_block_size | 8192
|
| transaction_prealloc_size | 4096
|
| tx_isolation | REPEATABLE-READ
|
| version | 4.1.20-Debian_0westend1-log
|
| version_bdb | Sleepycat Software: Berkeley DB 4.1.24:
(May 24, 2006) |
| version_comment | Source distribution
|
| version_compile_machine | i386
|
| version_compile_os | pc-linux-gnu
|
| wait_timeout | 28800
|
+---------------------------------+--------------------------------------------------------+
199 rows in set (0.00 sec)
--
Christian Hammers WESTEND GmbH | Internet-Business-Provider
Technik CISCO Systems Partner - Authorized Reseller
Lütticher Straße 10 Tel 0241/701333-11
[EMAIL PROTECTED] D-52064 Aachen Fax 0241/911879
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