Re: mysql behaviour

Claudio Nanni Mon, 09 Mar 2009 15:21:41 -0700

Still everything is relative, Aborted clients seems high but it could bejust a Django problem (does not close correctly connections),

can you tail some 100 lines from the mysql error log?


Miguel wrote:

On Mon, 2009-03-09 at 22:37 +0100, Miguel wrote:
as you say, it is not a fact. I m trying to find the problem but Ihave no experiences with ddbb performance.
I have also found file descriptors really big like this one (lsof info):
mysqld    17638       mysql   71u      REG        8,4   15925532      83013 
/usr/var/lib/mysql/django_session.MYD

I dont know if this could be a problem.
Another clue I have is that I have duplicated the framework in my pc(in both systems bbdd and framework are in the same machine) and thebbdd goes faster that the production one.
maybe, should I restart mysql?

(Thanks Claudio for your help)
here are the status results (this one: Aborted_clients doesnt seemreally nice):
+-----------------------------------+-------------+
| Variable_name                     | Value       |
+-----------------------------------+-------------+
| Aborted_clients | 25046 || Aborted_connects | 44 || Binlog_cache_disk_use | 0 || Binlog_cache_use | 1 || Bytes_received | 122 || Bytes_sent | 180 || Com_admin_commands | 0 || Com_alter_db | 0 || Com_alter_table | 0 || Com_analyze | 0 || Com_backup_table | 0 || Com_begin | 0 || Com_change_db | 0 || Com_change_master | 0 || Com_check | 0 || Com_checksum | 0 || Com_commit | 0 || Com_create_db | 0 || Com_create_function | 0 || Com_create_index | 0 || Com_create_table | 0 || Com_create_user | 0 || Com_dealloc_sql | 0 || Com_delete | 0 || Com_delete_multi | 0 || Com_do | 0 || Com_drop_db | 0 || Com_drop_function | 0 || Com_drop_index | 0 || Com_drop_table | 0 || Com_drop_user | 0 || Com_execute_sql | 0 || Com_flush | 0 || Com_grant | 0 || Com_ha_close | 0 || Com_ha_open | 0 || Com_ha_read | 0 || Com_help | 0 || Com_insert | 0 || Com_insert_select | 0 || Com_kill | 0 || Com_load | 0 || Com_load_master_data | 0 || Com_load_master_table | 0 || Com_lock_tables | 0 || 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 | 0 || Com_replace_select | 0 || Com_reset | 0 || Com_restore_table | 0 || Com_revoke | 0 || Com_revoke_all | 0 || Com_rollback | 0 || Com_savepoint | 0 || Com_select | 1 || Com_set_option | 0 || Com_show_binlog_events | 0 || Com_show_binlogs | 0 || Com_show_charsets | 0 || Com_show_collations | 0 || Com_show_column_types | 0 || Com_show_create_db | 0 || Com_show_create_table | 0 || Com_show_databases | 0 || Com_show_errors | 0 || Com_show_fields | 0 || Com_show_grants | 0 || Com_show_innodb_status | 0 || Com_show_keys | 0 || 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 | 0 || Com_show_slave_hosts | 0 || Com_show_slave_status | 0 || Com_show_status | 1 || Com_show_storage_engines | 0 || Com_show_tables | 0 || Com_show_triggers | 0 || Com_show_variables | 0 || Com_show_warnings | 0 || Com_slave_start | 0 || Com_slave_stop | 0 || Com_stmt_close | 0 || Com_stmt_execute | 0 || Com_stmt_fetch | 0 || Com_stmt_prepare | 0 || Com_stmt_reset | 0 || Com_stmt_send_long_data | 0 || Com_truncate | 0 || Com_unlock_tables | 0 || Com_update | 0 || Com_update_multi | 0 || Com_xa_commit | 0 || Com_xa_end | 0 || Com_xa_prepare | 0 || Com_xa_recover | 0 || Com_xa_rollback | 0 || Com_xa_start | 0 || Compression | OFF || Connections | 616340 || Created_tmp_disk_tables | 0 || Created_tmp_files | 31 || Created_tmp_tables | 1 || Delayed_errors | 0 || Delayed_insert_threads | 0 || Delayed_writes | 0 || Flush_commands | 1 || Handler_commit | 0 || Handler_delete | 0 || Handler_discover | 0 || Handler_prepare | 0 || Handler_read_first | 0 || Handler_read_key | 0 || Handler_read_next | 0 || Handler_read_prev | 0 || Handler_read_rnd | 0 || Handler_read_rnd_next | 0 || Handler_rollback | 0 || Handler_savepoint | 0 || Handler_savepoint_rollback | 0 || Handler_update | 0 || Handler_write | 131 || Innodb_buffer_pool_pages_data | 19 || Innodb_buffer_pool_pages_dirty | 0 || Innodb_buffer_pool_pages_flushed | 1 || Innodb_buffer_pool_pages_free | 493 || Innodb_buffer_pool_pages_latched | 0 || Innodb_buffer_pool_pages_misc | 0 || Innodb_buffer_pool_pages_total | 512 || Innodb_buffer_pool_read_ahead_rnd | 1 || Innodb_buffer_pool_read_ahead_seq | 0 || Innodb_buffer_pool_read_requests | 169 || Innodb_buffer_pool_reads | 12 || Innodb_buffer_pool_wait_free | 0 || Innodb_buffer_pool_write_requests | 1 || Innodb_data_fsyncs | 7 || Innodb_data_pending_fsyncs | 0 || Innodb_data_pending_reads | 0 || Innodb_data_pending_writes | 0 || Innodb_data_read | 2494464 || Innodb_data_reads | 25 || Innodb_data_writes | 7 || Innodb_data_written | 35328 || Innodb_dblwr_pages_written | 1 || Innodb_dblwr_writes | 1 || Innodb_log_waits | 0 || Innodb_log_write_requests | 0 || Innodb_log_writes | 2 || Innodb_os_log_fsyncs | 5 || Innodb_os_log_pending_fsyncs | 0 || Innodb_os_log_pending_writes | 0 || Innodb_os_log_written | 1024 || Innodb_page_size | 16384 || Innodb_pages_created | 0 || Innodb_pages_read | 19 || Innodb_pages_written | 1 || Innodb_row_lock_current_waits | 0 || Innodb_row_lock_time | 0 || Innodb_row_lock_time_avg | 0 || Innodb_row_lock_time_max | 0 || Innodb_row_lock_waits | 0 || Innodb_rows_deleted | 0 || Innodb_rows_inserted | 0 || Innodb_rows_read | 0 || Innodb_rows_updated | 0 || Key_blocks_not_flushed | 0 || Key_blocks_unused | 9438 || Key_blocks_used | 14497 || Key_read_requests | 39761741149 || Key_reads | 3592665 || Key_write_requests | 350460068 || Key_writes | 350307528 || Last_query_cost | 0.000000 || Max_used_connections | 30 || Ndb_cluster_node_id | 0 || Ndb_config_from_host | || Ndb_config_from_port | 0 || Ndb_number_of_data_nodes | 0 || Not_flushed_delayed_rows | 0 || Open_files | 129 || Open_streams | 0 || Open_tables | 64 || Opened_tables | 0 || Prepared_stmt_count | 0 || Qcache_free_blocks | 1093 || Qcache_free_memory | 3048576 || Qcache_hits | 447421329 || Qcache_inserts | 13377148 || Qcache_lowmem_prunes | 4819545 || Qcache_not_cached | 64236 || Qcache_queries_in_cache | 3617 || Qcache_total_blocks | 8471 || Questions | 777237127 || Rpl_status | NULL || Select_full_join | 0 || Select_full_range_join | 0 || Select_range | 0 || Select_range_check | 0 || Select_scan | 1 || Slave_open_temp_tables | 0 || Slave_retried_transactions | 0 || Slave_running | OFF || Slow_launch_threads | 0 || Slow_queries | 0 || Sort_merge_passes | 0 || Sort_range | 0 || Sort_rows | 0 || Sort_scan | 0 || Ssl_accept_renegotiates | 0 || Ssl_accepts | 0 || Ssl_callback_cache_hits | 0 || Ssl_cipher | || Ssl_cipher_list | || Ssl_client_connects | 0 || Ssl_connect_renegotiates | 0 || Ssl_ctx_verify_depth | 0 || Ssl_ctx_verify_mode | 0 || Ssl_default_timeout | 0 || Ssl_finished_accepts | 0 || Ssl_finished_connects | 0 || Ssl_session_cache_hits | 0 || Ssl_session_cache_misses | 0 || Ssl_session_cache_mode | NONE || Ssl_session_cache_overflows | 0 || Ssl_session_cache_size | 0 || Ssl_session_cache_timeouts | 0 || Ssl_sessions_reused | 0 || Ssl_used_session_cache_entries | 0 || Ssl_verify_depth | 0 || Ssl_verify_mode | 0 || Ssl_version | || Table_locks_immediate | 175862068 || Table_locks_waited | 12103 || Tc_log_max_pages_used | 0 || Tc_log_page_size | 0 || Tc_log_page_waits | 0 || Threads_cached | 5 || Threads_connected | 5 || Threads_created | 581 || Threads_running | 1 || Uptime | 7100847 |+-----------------------------------+-------------+
251 rows in set (0.13 sec)



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