Forums / Install & configuration / MySQL troubles / Update requests

MySQL troubles / Update requests

Previous topic

Install & configuration

Next topic

Author	Message
Romain Dausset	Tuesday 22 April 2008 2:05:12 am Hello everybody, We have lots of Update requests which take about 50s to be executed. UPDATE ezcontentobject_tree SET modified_subnode=1208854300 WHERE node_id='1' OR node_id='5' OR node \|... Therefore we have between 20 and 30 request in queue, waiting to be executed. We can see, consequently, database transaction errors and very slow connection and navigation... Our configuration is the following : Bi Dual Core Intel® Xeon® 5150, 4MB Cache, 2.66GHz, 1333FSB. With apache 2.0 / mysql 5.0 on the same server. eZ 3.9 (Passing in 4.0 is not possible...) We tried to deporte the database on another server (Dual Core Intel(R) Xeon(TM) CPU 2.60GHz), but without success... mysqld always takes more than 200% of CPU... Any ideas to resolve our problem ? Thank you in advance. [email protected] -- Romain Dausset [email protected] http://www.facileit.com
Romain Dausset	Tuesday 22 April 2008 2:18:45 am Our configuration of MySQL is the following : mysql> show variables; +---------------------------------+-----------------------------+ \| 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 \| \| 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 \| YES \| \| have_bdb \| NO \| \| have_blackhole_engine \| NO \| \| 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_query_cache \| YES \| \| have_raid \| NO \| \| have_rtree_keys \| YES \| \| have_symlink \| YES \| \| init_connect \| \| \| init_file \| \| \| init_slave \| \| \| innodb_additional_mem_pool_size \| 52428800 \| \| innodb_autoextend_increment \| 8 \| \| innodb_buffer_pool_awe_mem_mb \| 0 \| \| innodb_buffer_pool_size \| 734003200 \| \| 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 \| 1048576 \| \| innodb_log_file_size \| 5242880 \| \| 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 \| OFF \| \| innodb_thread_concurrency \| 8 \| \| innodb_thread_sleep_delay \| 10000 \| \| interactive_timeout \| 28800 \| \| join_buffer_size \| 131072 \| \| key_buffer_size \| 524288000 \| \| 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 \| OFF \| \| log_bin_trust_function_creators \| OFF \| \| log_error \| \| \| log_queries_not_using_indexes \| OFF \| \| log_slave_updates \| OFF \| \| log_slow_queries \| ON \| \| 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 \| 10 \| \| max_connections \| 400 \| \| 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 \| \| net_buffer_length \| 16384 \| \| net_read_timeout \| 30 \| \| net_retry_count \| 10 \| \| net_write_timeout \| 60 \| \| new \| OFF \| \| old_passwords \| OFF \| \| open_files_limit \| 8410 \| \| optimizer_prune_level \| 1 \| \| optimizer_search_depth \| 62 \| \| pid_file \| /var/run/mysqld/mysqld.pid \| \| port \| 3306 \| \| preload_buffer_size \| 32768 \| \| 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 \| \| server_id \| 0 \| \| 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 \| 3145720 \| \| 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 \| CEST \| \| table_cache \| 4000 \| \| table_lock_wait_timeout \| 50 \| \| table_type \| MyISAM \| \| 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 \| 5.0.32-Debian_7etch5-log \| \| version_comment \| Debian etch distribution \| \| version_compile_machine \| i486 \| \| version_compile_os \| pc-linux-gnu \| \| wait_timeout \| 28800 \| +---------------------------------+-----------------------------+ Thank you... -- Romain Dausset [email protected] http://www.facileit.com

Author

Message

Romain Dausset

Tuesday 22 April 2008 2:05:12 am

Hello everybody,

We have lots of Update requests which take about 50s to be executed.

UPDATE ezcontentobject_tree SET modified_subnode=1208854300 WHERE node_id='1' OR node_id='5' OR node |...

Therefore we have between 20 and 30 request in queue, waiting to be executed.

We can see, consequently, database transaction errors and very slow connection and navigation...

Our configuration is the following :

Bi Dual Core Intel® Xeon® 5150, 4MB Cache, 2.66GHz, 1333FSB.

With apache 2.0 / mysql 5.0 on the same server.

eZ 3.9 (Passing in 4.0 is not possible...)

We tried to deporte the database on another server (Dual Core Intel(R) Xeon(TM) CPU 2.60GHz),
but without success... mysqld always takes more than 200% of CPU...

Any ideas to resolve our problem ?

Thank you in advance.

[email protected]

--
Romain Dausset

[email protected]

http://www.facileit.com

Romain Dausset

Tuesday 22 April 2008 2:18:45 am

Our configuration of MySQL is the following :


mysql> show variables;
+---------------------------------+-----------------------------+
| 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                           |
| 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                    | YES                         |
| have_bdb                        | NO                          |
| have_blackhole_engine           | NO                          |
| 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_query_cache                | YES                         |
| have_raid                       | NO                          |
| have_rtree_keys                 | YES                         |
| have_symlink                    | YES                         |
| init_connect                    |                             |
| init_file                       |                             |
| init_slave                      |                             |
| innodb_additional_mem_pool_size | 52428800                    |
| innodb_autoextend_increment     | 8                           |
| innodb_buffer_pool_awe_mem_mb   | 0                           |
| innodb_buffer_pool_size         | 734003200                   |
| 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          | 1048576                     |
| innodb_log_file_size            | 5242880                     |
| 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              | OFF                         |
| innodb_thread_concurrency       | 8                           |
| innodb_thread_sleep_delay       | 10000                       |
| interactive_timeout             | 28800                       |
| join_buffer_size                | 131072                      |
| key_buffer_size                 | 524288000                   |
| 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                         | OFF                         |
| log_bin_trust_function_creators | OFF                         |
| log_error                       |                             |
| log_queries_not_using_indexes   | OFF                         |
| log_slave_updates               | OFF                         |
| log_slow_queries                | ON                          |
| 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              | 10                          |
| max_connections                 | 400                         |
| 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                           |
| net_buffer_length               | 16384                       |
| net_read_timeout                | 30                          |
| net_retry_count                 | 10                          |
| net_write_timeout               | 60                          |
| new                             | OFF                         |
| old_passwords                   | OFF                         |
| open_files_limit                | 8410                        |
| optimizer_prune_level           | 1                           |
| optimizer_search_depth          | 62                          |
| pid_file                        | /var/run/mysqld/mysqld.pid  |
| port                            | 3306                        |
| preload_buffer_size             | 32768                       |
| 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                         |
| server_id                       | 0                           |
| 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                | 3145720                     |
| 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                | CEST                        |
| table_cache                     | 4000                        |
| table_lock_wait_timeout         | 50                          |
| table_type                      | MyISAM                      |
| 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                         | 5.0.32-Debian_7etch5-log    |
| version_comment                 | Debian etch distribution    |
| version_compile_machine         | i486                        |
| version_compile_os              | pc-linux-gnu                |
| wait_timeout                    | 28800                       |
+---------------------------------+-----------------------------+

Thank you...

--
Romain Dausset

[email protected]

http://www.facileit.com