Optymalizacja MySQL

[ziele029 3]

Witam, mam mały problem z MySQL potrafi po kilka razy ciągnąc po 128Mb, a dopiero strona i forum są w budowie .

Jak można ją zoptymalizować by oszczędzała ram ?

 

Dzięki.

[Misiek08 285]

Po pierwsze wraz z przybywaniem użytkowników to zużycie nie wzrośnie za wiele. Prawdopodobnie używasz InnoDB, które lubi przytulić RAM.

[LANcaster (kotkowicz.pl) 52]

Po pierwsze wraz z przybywaniem użytkowników to zużycie nie wzrośnie za wiele. Prawdopodobnie używasz InnoDB, które lubi przytulić RAM.

 

No właśnie nie do końca - w wypadku InnoDB dużo łatwiej jest ograniczyć zużycie RAMu niż w wypadku MyISAM. InnoDB w zasadzie potrzebuje RAMu na swój pool, natomiast w wypadku MyISAM masz cache tabel, cache zapytań, bufor do sortowania, bufor do zapytań, bufor do joinów, bufor na klucze indeksów, record buffer - do przeszukiwania bez użycia indeksów, oraz kilkanaście innych duperelków, które pewnie pominąłem.

 

Witam, mam mały problem z MySQL potrafi po kilka razy ciągnąc po 128Mb, a dopiero strona i forum są w budowie .

Jak można ją zoptymalizować by oszczędzała ram ?

 

Dzięki.

 

Optymalizacja bazy danych nie polega na tym, by jej przydzielić jak najmniej RAMu. Napisz coś więcej o aplikacji - jakich używa silników do tabel (MyISAM/InnoDB), czy ma zoptymalizowane indeksy, ile przewidujesz rekordów w tabelach, ile będzie tabel.

 

Pokaż też wynik polecenia mysqladmin extended-status

[Rafał Marzęcki 0]

Cześć. Mam podobny problem do kolegi, który założył ten temat. Niżej przedstawiam wynik z mysqladmin extended-status, oraz mój plik my.cnf

 

 

+------------------------------------------+-------------+

| Variable_name | Value |

+------------------------------------------+-------------+

| Aborted_clients | 0 |

| Aborted_connects | 0 |

| Binlog_cache_disk_use | 0 |

| Binlog_cache_use | 0 |

| Binlog_stmt_cache_disk_use | 0 |

| Binlog_stmt_cache_use | 0 |

| Bytes_received | 67915 |

| Bytes_sent | 120318 |

| Com_admin_commands | 2 |

| Com_assign_to_keycache | 0 |

| Com_alter_db | 0 |

| Com_alter_db_upgrade | 0 |

| Com_alter_event | 0 |

| Com_alter_function | 0 |

| Com_alter_procedure | 0 |

| Com_alter_server | 0 |

| Com_alter_table | 113 |

| Com_alter_tablespace | 0 |

| Com_analyze | 0 |

| Com_begin | 0 |

| Com_binlog | 0 |

| Com_call_procedure | 0 |

| Com_change_db | 16 |

| Com_change_master | 0 |

| Com_check | 24 |

| Com_checksum | 0 |

| Com_commit | 0 |

| Com_create_db | 1 |

| Com_create_event | 0 |

| Com_create_function | 0 |

| Com_create_index | 0 |

| Com_create_procedure | 1 |

| Com_create_server | 0 |

| Com_create_table | 42 |

| Com_create_trigger | 0 |

| Com_create_udf | 0 |

| Com_create_user | 1 |

| Com_create_view | 0 |

| Com_dealloc_sql | 24 |

| Com_delete | 0 |

| Com_delete_multi | 0 |

| Com_do | 0 |

| Com_drop_db | 1 |

| Com_drop_event | 0 |

| Com_drop_function | 0 |

| Com_drop_index | 0 |

| Com_drop_procedure | 2 |

| Com_drop_server | 0 |

| Com_drop_table | 1 |

| Com_drop_trigger | 0 |

| Com_drop_user | 0 |

| Com_drop_view | 0 |

| Com_empty_query | 0 |

| Com_execute_sql | 24 |

| Com_flush | 1 |

| Com_grant | 1 |

| Com_ha_close | 0 |

| Com_ha_open | 0 |

| Com_ha_read | 0 |

| Com_help | 0 |

| Com_insert | 1 |

| Com_insert_select | 1 |

| Com_install_plugin | 0 |

| Com_kill | 0 |

| Com_load | 0 |

| Com_lock_tables | 0 |

| Com_optimize | 0 |

| Com_preload_keys | 0 |

| Com_prepare_sql | 24 |

| Com_purge | 0 |

| Com_purge_before_date | 0 |

| Com_release_savepoint | 0 |

| Com_rename_table | 0 |

| Com_rename_user | 0 |

| Com_repair | 0 |

| Com_replace | 0 |

| Com_replace_select | 0 |

| Com_reset | 0 |

| Com_resignal | 0 |

| Com_revoke | 0 |

| Com_revoke_all | 0 |

| Com_rollback | 0 |

| Com_rollback_to_savepoint | 0 |

| Com_savepoint | 0 |

| Com_select | 96 |

| Com_set_option | 198 |

| Com_signal | 0 |

| Com_show_authors | 0 |

| Com_show_binlog_events | 0 |

| Com_show_binlogs | 12 |

| Com_show_charsets | 0 |

| Com_show_collations | 0 |

| Com_show_contributors | 0 |

| Com_show_create_db | 0 |

| Com_show_create_event | 0 |

| Com_show_create_func | 0 |

| Com_show_create_proc | 0 |

| Com_show_create_table | 0 |

| Com_show_create_trigger | 0 |

| Com_show_databases | 4 |

| Com_show_engine_logs | 0 |

| Com_show_engine_mutex | 0 |

| Com_show_engine_status | 0 |

| Com_show_events | 0 |

| Com_show_errors | 0 |

| Com_show_fields | 2 |

| Com_show_function_status | 0 |

| Com_show_grants | 1 |

| Com_show_keys | 0 |

| Com_show_master_status | 3 |

| Com_show_open_tables | 0 |

| Com_show_plugins | 14 |

| Com_show_privileges | 0 |

| Com_show_procedure_status | 0 |

| Com_show_processlist | 1 |

| Com_show_profile | 0 |

| Com_show_profiles | 0 |

| Com_show_relaylog_events | 0 |

| Com_show_slave_hosts | 0 |

| Com_show_slave_status | 3 |

| Com_show_status | 4 |

| Com_show_storage_engines | 0 |

| Com_show_table_status | 0 |

| Com_show_tables | 5 |

| Com_show_triggers | 0 |

| Com_show_variables | 6 |

| Com_show_warnings | 0 |

| Com_slave_start | 0 |

| Com_slave_stop | 0 |

| Com_stmt_close | 24 |

| Com_stmt_execute | 24 |

| Com_stmt_fetch | 0 |

| Com_stmt_prepare | 24 |

| Com_stmt_reprepare | 0 |

| Com_stmt_reset | 0 |

| Com_stmt_send_long_data | 0 |

| Com_truncate | 0 |

| Com_uninstall_plugin | 0 |

| Com_unlock_tables | 0 |

| Com_update | 14 |

| Com_update_multi | 1 |

| 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 | 58 |

| Created_tmp_disk_tables | 72 |

| Created_tmp_files | 5 |

| Created_tmp_tables | 242 |

| Delayed_errors | 0 |

| Delayed_insert_threads | 0 |

| Delayed_writes | 0 |

| Flush_commands | 2 |

| Handler_commit | 0 |

| Handler_delete | 1 |

| Handler_discover | 0 |

| Handler_prepare | 0 |

| Handler_read_first | 20 |

| Handler_read_key | 8 |

| Handler_read_last | 0 |

| Handler_read_next | 16 |

| Handler_read_prev | 0 |

| Handler_read_rnd | 18 |

| Handler_read_rnd_next | 3574 |

| Handler_rollback | 0 |

| Handler_savepoint | 0 |

| Handler_savepoint_rollback | 0 |

| Handler_update | 1 |

| Handler_write | 3317 |

| Innodb_buffer_pool_pages_data | 142 |

| Innodb_buffer_pool_pages_dirty | 0 |

| Innodb_buffer_pool_pages_flushed | 2 |

| Innodb_buffer_pool_pages_free | 8049 |

| Innodb_buffer_pool_pages_misc | 0 |

| Innodb_buffer_pool_pages_total | 8191 |

| Innodb_buffer_pool_read_ahead_rnd | 0 |

| Innodb_buffer_pool_read_ahead | 0 |

| Innodb_buffer_pool_read_ahead_evicted | 0 |

| Innodb_buffer_pool_read_requests | 458 |

| Innodb_buffer_pool_reads | 143 |

| 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 | 4526080 |

| Innodb_data_reads | 153 |

| Innodb_data_writes | 7 |

| Innodb_data_written | 35328 |

| Innodb_dblwr_pages_written | 1 |

| Innodb_dblwr_writes | 1 |

| Innodb_have_atomic_builtins | ON |

| 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 | 142 |

| 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 |

| Innodb_truncated_status_writes | 0 |

| Key_blocks_not_flushed | 0 |

| Key_blocks_unused | 13391 |

| Key_blocks_used | 5 |

| Key_read_requests | 122 |

| Key_reads | 3 |

| Key_write_requests | 154 |

| Key_writes | 45 |

| Last_query_cost | 0.000000 |

| Max_used_connections | 1 |

| Not_flushed_delayed_rows | 0 |

| Open_files | 48 |

| Open_streams | 0 |

| Open_table_definitions | 41 |

| Open_tables | 41 |

| Opened_files | 1292 |

| Opened_table_definitions | 290 |

| Opened_tables | 430 |

| Performance_schema_cond_classes_lost | 0 |

| Performance_schema_cond_instances_lost | 0 |

| Performance_schema_file_classes_lost | 0 |

| Performance_schema_file_handles_lost | 0 |

| Performance_schema_file_instances_lost | 0 |

| Performance_schema_locker_lost | 0 |

| Performance_schema_mutex_classes_lost | 0 |

| Performance_schema_mutex_instances_lost | 0 |

| Performance_schema_rwlock_classes_lost | 0 |

| Performance_schema_rwlock_instances_lost | 0 |

| Performance_schema_table_handles_lost | 0 |

| Performance_schema_table_instances_lost | 0 |

| Performance_schema_thread_classes_lost | 0 |

| Performance_schema_thread_instances_lost | 0 |

| Prepared_stmt_count | 0 |

| Qcache_free_blocks | 1 |

| Qcache_free_memory | 16759696 |

| Qcache_hits | 0 |

| Qcache_inserts | 0 |

| Qcache_lowmem_prunes | 0 |

| Qcache_not_cached | 96 |

| Qcache_queries_in_cache | 0 |

| Qcache_total_blocks | 1 |

| Queries | 674 |

| Questions | 674 |

| Rpl_status | AUTH_MASTER |

| Select_full_join | 0 |

| Select_full_range_join | 0 |

| Select_range | 0 |

| Select_range_check | 0 |

| Select_scan | 65 |

| Slave_heartbeat_period | 0.000 |

| Slave_open_temp_tables | 0 |

| Slave_received_heartbeats | 0 |

| Slave_retried_transactions | 0 |

| Slave_running | OFF |

| Slow_launch_threads | 0 |

| Slow_queries | 0 |

| Sort_merge_passes | 0 |

| Sort_range | 0 |

| Sort_rows | 18 |

| Sort_scan | 3 |

| 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 | 298 |

| Table_locks_waited | 0 |

| Tc_log_max_pages_used | 0 |

| Tc_log_page_size | 0 |

| Tc_log_page_waits | 0 |

| Threads_cached | 0 |

| Threads_connected | 1 |

| Threads_created | 2 |

| Threads_running | 1 |

| Uptime | 59544 |

| Uptime_since_flush_status | 59544 |

+------------------------------------------+-------------+

 

 

#

# The MySQL database server configuration file.

#

# You can copy this to one of:

# - "/etc/mysql/my.cnf" to set global options,

# - "~/.my.cnf" to set user-specific options.

#

# One can use all long options that the program supports.

# Run program with --help to get a list of available options and with

# --print-defaults to see which it would actually understand and use.

#

# For explanations see

# http://dev.mysql.com...-variables.html

 

# This will be passed to all mysql clients

# It has been reported that passwords should be enclosed with ticks/quotes

# escpecially if they contain "#" chars...

# Remember to edit /etc/mysql/debian.cnf when changing the socket location.

[client]

port = 3306

socket = /var/run/mysqld/mysqld.sock

 

# Here is entries for some specific programs

# The following values assume you have at least 32M ram

 

# This was formally known as [safe_mysqld]. Both versions are currently parsed.

[mysqld_safe]

socket = /var/run/mysqld/mysqld.sock

nice = 0

 

[mysqld]

#

# * Basic Settings

#

user = mysql

pid-file = /var/run/mysqld/mysqld.pid

socket = /var/run/mysqld/mysqld.sock

port = 3306

basedir = /usr

datadir = /var/lib/mysql

tmpdir = /tmp

#lc-message-dir is unknown to MySQL 5.1

#lc-messages-dir = /usr/share/mysql

skip-external-locking

#

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

bind-address = 127.0.0.1

#

# * Fine Tuning

#

key_buffer = 16M

max_allowed_packet = 16M

thread_stack = 128K

thread_cache_size = 8

# This replaces the startup script and checks MyISAM tables if needed

# the first time they are touched

myisam-recover = BACKUP

#max_connections = 100

#table_cache = 64

#thread_concurrency = 10

#

# * Query Cache Configuration

#

query_cache_limit = 1M

query_cache_size = 16M

#

# * Logging and Replication

#

# Both location gets rotated by the cronjob.

# Be aware that this log type is a performance killer.

# As of 5.1 you can enable the log at runtime!

#general_log_file = /var/log/mysql/mysql.log

#general_log = 1

#

# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf.

#

# Here you can see queries with especially long duration

#log_slow_queries = /var/log/mysql/mysql-slow.log

#long_query_time = 2

#log-queries-not-using-indexes

#

# The following can be used as easy to replay backup logs or for replication.

# note: if you are setting up a replication slave, see README.Debian about

# other settings you may need to change.

#server-id = 1

#log_bin = /var/log/mysql/mysql-bin.log

expire_logs_days = 10

max_binlog_size = 100M

#binlog_do_db = include_database_name

#binlog_ignore_db = include_database_name

#

# * InnoDB

#

# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.

# Read the manual for more InnoDB related options. There are many!

#

# * Security Features

#

# Read the manual, too, if you want chroot!

# chroot = /var/lib/mysql/

#

# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".

#

# ssl-ca=/etc/mysql/cacert.pem

# ssl-cert=/etc/mysql/server-cert.pem

# ssl-key=/etc/mysql/server-key.pem

 

 

 

[mysqldump]

quick

quote-names

max_allowed_packet = 16M

 

[mysql]

#no-auto-rehash # faster start of mysql but no tab completition

 

[isamchk]

key_buffer = 16M

 

#

# * IMPORTANT: Additional settings that can override those from this file!

# The files must end with '.cnf', otherwise they'll be ignored.

#

!includedir /etc/mysql/conf.d/

 

Edytowano Marzec 2, 2012 przez Rafał Marzęcki (zobacz historię edycji)

[LANcaster (kotkowicz.pl) 52]

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