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Dotaz: MySQL zatezuje procesor na 100%

24.4.2008 23:03 lnykryn | skóre: 11 | Brno
MySQL zatezuje procesor na 100%
Přečteno: 861×
Odpovědět | Admin
Dnes mi temer z hodiny na hodinu na serveru vyletlo zatizeni jednoho jadra procesoru od myslq na 100%. Prolezal jsem ruzne logy ale nic zajimavyho jsem nenasel. Nemuzete mi nekdo poradit jak mam lokalizovat co tuto situaci zpusobilo?
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Odpovědi

24.4.2008 23:44 lnykryn | skóre: 11 | Brno
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Mozna bych mel doplnit ze mysql tam bezi uz asi tri mesice v posledni dobe jsme nic nemenily, proto mi vyse zminene chovani prijde podezrele.
25.4.2008 07:09 cronin | skóre: 49
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Nemohlo do nejakej tabulky pribudnut velke mnozstvo zaznamov?
Heron avatar 25.4.2008 07:41 Heron | skóre: 53 | blog: root_at_heron | Olomouc
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Co napíše:
SHOW PROCESSLIST;
?
Heron
25.4.2008 10:25 lnykryn | skóre: 11 | Brno
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Do databaze zadne vetsi mnozstvi data nepribylo, a co se tyce toho procelistu tak tam je sem tam nejaky dotaz od php. Zvetsil jsem vyrovnavaci pameti mysql, ale pomohlo to jen castecne, ted pokazdy kdyz nekdo polozi dotaz vyletne zatizeni na 100% a dotaz trva podezrele dlouho. Jinak procesor je znacne naddimenzovany.
25.4.2008 10:58 Jakub Suchy | skóre: 22 | Praha
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SHOW FULL PROCESSLIST.

taky mysqladmin status -p - kolik je dotazu za sekundu?

tipuju naka pomala query. zkus zapnout vypis slow queries
25.4.2008 11:48 lnykryn | skóre: 11 | Brno
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Uptimeme: 40235 Threads: 6 Questions: 3927311 Slow queries: 73 Opens: 1514 Flush tables: 1 Open tables: 1508 Queries per second avg: 97.609

Ty ty poamly dotazy loguju ukladam a predavam kolegovi aby je upravil, me spise jde ted o to ze vsechny dotazy trvaji radove dele nez driv a neumerner zatezuji procesor.
25.4.2008 15:22 cronin | skóre: 49
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Nezmazal niekto omylom nejaky index?
25.4.2008 16:28 lnykryn | skóre: 11 | Brno
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Indexy jsme taky obnovili.
25.4.2008 18:18 azurIt | skóre: 34 | blog: zatial_bez_mena
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zdravim Reunix :) nieco podobne sa tu uz riesilo par krat. skus pozriet napr. sem:
http://www.abclinuxu.cz/forum/show/216322
26.4.2008 15:26 lnykryn | skóre: 11 | Brno
Rozbalit Rozbalit vše Re: MySQL zatezuje procesor na 100%
Nez jsem se zeptal tak jsem to tu (snad dukladne) prohledal. Ale vetsinou se nikde nedostali do konce a postupy tam zverejnene jsem uz zkousel.
26.4.2008 15:35 lnykryn | skóre: 11 | Brno
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Jeste tady je vypis promennych MySQL, prosim podivejte se jestli jsem neco neopomel:
+---------------------------------+------------------------------+
| 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                | 20                           |
| flush                           | OFF                          |
| flush_time                      | 0                            |
| ft_boolean_syntax               | + -><()~*:""&|               |
| ft_max_word_len                 | 84                           |
| ft_min_word_len                 | 3                            |
| ft_query_expansion_limit        | 20                           |
| ft_stopword_file                | (built-in)                   |
| group_concat_max_len            | 1024                         |
| have_archive                    | YES                          |
| have_bdb                        | NO                           |
| have_blackhole_engine           | YES                          |
| 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_ssl                        | DISABLED                     |
| have_query_cache                | YES                          |
| have_raid                       | NO                           |
| have_rtree_keys                 | YES                          |
| have_symlink                    | YES                          |
| hostname                        | d772                         |
| 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         | 134217728                    |
| 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  | 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                           |
| 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                        |
| interactive_timeout             | 28800                        |
| join_buffer_size                | 131072                       |
| key_buffer_size                 | 67108864                     |
| 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                         | ON                           |
| 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                 | 104857600                    |
| 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                   | 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                            |
| ndb_connectstring               |                              |
| net_buffer_length               | 16384                        |
| net_read_timeout                | 30                           |
| net_retry_count                 | 10                           |
| net_write_timeout               | 60                           |
| new                             | OFF                          |
| old_passwords                   | ON                           |
| open_files_limit                | 8302                         |
| optimizer_prune_level           | 1                            |
| optimizer_search_depth          | 62                           |
| pid_file                        | /var/run/mysqld/mysqld.pid   |
| 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                | 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                          |
| secure_file_priv                |                              |
| server_id                       | 1                            |
| 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                | 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                | CEST                         |
| table_cache                     | 4096                         |
| table_lock_wait_timeout         | 50                           |
| table_type                      | MyISAM                       |
| thread_cache_size               | 0                            |
| thread_stack                    | 131072                       |
| time_format                     | %H:%i:%s                     |
| time_zone                       | SYSTEM                       |
| timed_mutexes                   | OFF                          |
| tmp_table_size                  | 536870912                    |
| tmpdir                          | /tmp                         |
| transaction_alloc_block_size    | 8192                         |
| transaction_prealloc_size       | 4096                         |
| tx_isolation                    | REPEATABLE-READ              |
| updatable_views_with_limit      | YES                          |
| version                         | 5.0.45-Debian_1ubuntu3.1-log |
| version_comment                 | Debian etch distribution     |
| version_compile_machine         | i486                         |
| version_compile_os              | pc-linux-gnu                 |
| wait_timeout                    | 28800                        |
+---------------------------------+------------------------------+

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