Gość kucziapa Zgłoś post Napisano Listopad 22, 2009 Witam mysql mi czasami szaleje i obciąża serwer po wykonaniu ./tuning-primer.sh dostałem coś takiego s1:~# ./tuning-primer.sh -- MYSQL PERFORMANCE TUNING PRIMER -- - By: Matthew Montgomery - MySQL Version 5.0.81 i686 Uptime = 18 days 7 hrs 12 min 41 sec Avg. qps = 1090 Total Questions = 1723908414 Threads Connected = 3 Server has been running for over 48hrs. It should be safe to follow these recommendations To find out more information on how each of these runtime variables effects performance visit: http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html Visit http://www.mysql.com/products/enterprise/advisors.html for info about MySQL's Enterprise Monitoring and Advisory Service SLOW QUERIES The slow query log is NOT enabled. Current long_query_time = 10 sec. You have 251 out of 1723908446 that take longer than 10 sec. to complete Your long_query_time may be too high, I typically set this under 5 sec. BINARY UPDATE LOG The binary update log is NOT enabled. You will not be able to do point in time recovery See http://dev.mysql.com/doc/refman/5.0/en/point-in-time-recovery.html WORKER THREADS Current thread_cache_size = 80 Current threads_cached = 48 Current threads_per_sec = 0 Historic threads_per_sec = 0 Your thread_cache_size is fine MAX CONNECTIONS Current max_connections = 500 Current threads_connected = 2 Historic max_used_connections = 50 The number of used connections is 10% of the configured maximum. You are using less than 10% of your configured max_connections. Lowering max_connections could help to avoid an over-allocation of memory See "MEMORY USAGE" section to make sure you are not over-allocating MEMORY USAGE Max Memory Ever Allocated : 388 M Configured Max Per-thread Buffers : 1.92 G Configured Max Global Buffers : 192 M Configured Max Memory Limit : 2.11 G Physical Memory : 1.91 G Max memory limit exceeds 90% of physical memory KEY BUFFER Current MyISAM index space = 438 M Current key_buffer_size = 150 M Key cache miss rate is 1 : 818 Key buffer free ratio = 84 % Your key_buffer_size seems to be fine QUERY CACHE Query cache is enabled Current query_cache_size = 32 M Current query_cache_used = 22 M Current query_cache_limit = 1 M Current Query cache Memory fill ratio = 69.98 % Current query_cache_min_res_unit = 4 K MySQL won't cache query results that are larger than query_cache_limit in size SORT OPERATIONS Current sort_buffer_size = 1 M Current read_rnd_buffer_size = 768 K Sort buffer seems to be fine JOINS Current join_buffer_size = 1.00 M You have had 36281 queries where a join could not use an index properly You have had 2368 joins without keys that check for key usage after each row You should enable "log-queries-not-using-indexes" Then look for non indexed joins in the slow query log. If you are unable to optimize your queries you may want to increase your join_buffer_size to accommodate larger joins in one pass. Note! This script will still suggest raising the join_buffer_size when ANY joins not using indexes are found. OPEN FILES LIMIT Current open_files_limit = 2500 files The open_files_limit should typically be set to at least 2x-3x that of table_cache if you have heavy MyISAM usage. Your open_files_limit value seems to be fine TABLE CACHE Current table_cache value = 512 tables You have a total of 25859 tables You have 512 open tables. Current table_cache hit rate is 0%, while 100% of your table cache is in use You should probably increase your table_cache TEMP TABLES Current max_heap_table_size = 16 M Current tmp_table_size = 32 M Of 1496979 temp tables, 23% were created on disk Effective in-memory tmp_table_size is limited to max_heap_table_size. Created disk tmp tables ratio seems fine TABLE SCANS Current read_buffer_size = 1 M Current table scan ratio = 43 : 1 read_buffer_size seems to be fine TABLE LOCKING Current Lock Wait ratio = 1 : 102 You may benefit from selective use of InnoDB. If you have long running SELECT's against MyISAM tables and perform frequent updates consider setting 'low_priority_updates=1' If you have a high concurrency of inserts on Dynamic row-length tables consider setting 'concurrent_insert=2'. moża coś poradzić albo jakiś tuning ? Udostępnij ten post Link to postu Udostępnij na innych stronach
krdc.pl 91 Zgłoś post Napisano Listopad 23, 2009 SLOW QUERIES The slow query log is NOT enabled. Current long_query_time = 10 sec. You have 251 out of 1723908446 that take longer than 10 sec. to complete Your long_query_time may be too high, I typically set this under 5 sec. wlacz i ustaw na 2sekundy albo nawet na 1s zobaczysz jakie zapytania ida powoli popatrze jeszcze pod katem ramu na cache - jesli sa duze tabele to pomoze Udostępnij ten post Link to postu Udostępnij na innych stronach
Elber 0 Zgłoś post Napisano Grudzień 9, 2009 Jakie proponujecie ustawić wartości i co zmienić w konfiguracji mysql ? Wynik z mysqltuner.pl >> MySQLTuner 1.0.1 - Major Hayden <major@mhtx.net> >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering Please enter your MySQL administrative login: root Please enter your MySQL administrative password: -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.0.51a-24+lenny2-log [OK] Operating on 32-bit architecture with less than 2GB RAM -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 59M (Tables: 351) [--] Data in InnoDB tables: 48M (Tables: 271) [!!] Total fragmented tables: 19 -------- Performance Metrics ------------------------------------------------- [--] Up for: 1d 5h 48m 17s (749K q [6.987 qps], 36K conn, TX: 1B, RX: 138M) [--] Reads / Writes: 53% / 47% [--] Total buffers: 600.0M global + 2.6M per thread (100 max threads) [OK] Maximum possible memory usage: 862.5M (43% of installed RAM) [OK] Slow queries: 0% (0/749K) [OK] Highest usage of available connections: 13% (13/100) [OK] Key buffer size / total MyISAM indexes: 512.0M/61.4M [OK] Key buffer hit rate: 100.0% (212M cached / 48K reads) [OK] Query cache efficiency: 30.8% (123K cached / 400K selects) [!!] Query cache prunes per day: 106079 [OK] Sorts requiring temporary tables: 0% (2 temp sorts / 35K sorts) [!!] Temporary tables created on disk: 27% (6K on disk / 23K total) [OK] Thread cache hit rate: 99% (45 created / 36K connections) [OK] Table cache hit rate: 86% (1K open / 1K opened) [OK] Open file limit used: 1% (919/65K) [OK] Table locks acquired immediately: 99% (640K immediate / 640K locks) [!!] InnoDB data size / buffer pool: 48.3M/38.0M -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance When making adjustments, make tmp_table_size/max_heap_table_size equal Reduce your SELECT DISTINCT queries without LIMIT clauses Variables to adjust: query_cache_size (> 32M) tmp_table_size (> 32M) max_heap_table_size (> 16M) innodb_buffer_pool_size (>= 48M) Mój my.cnf # # 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/doc/mysql/en/server-system-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 language = /usr/share/mysql/english 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 = 512M 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 wait_timeout = 30 #max_connections = 100 table_cache = 1M #thread_concurrency = 10 # # * Query Cache Configuration # query_cache_limit = 4M query_cache_size = 32M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. #log = /var/log/mysql/mysql.log # # Error logging goes to syslog. This is a Debian improvement # # Here you can see queries with especially long duration #log_slow_queries = /var/log/mysql/mysql-slow.log log-slow-queries = /var/log/mysql/log-slow-queries.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 # # * BerkeleyDB # # Using BerkeleyDB is now discouraged as its support will cease in 5.1.12. skip-bdb # # * 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! # You might want to disable InnoDB to shrink the mysqld process by circa 100MB. #skip-innodb # # * 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 innodb_buffer_pool_size = 38M [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M # # * NDB Cluster # # See /usr/share/doc/mysql-server-*/README.Debian for more information. # # The following configuration is read by the NDB Data Nodes (ndbd processes) # not from the NDB Management Nodes (ndb_mgmd processes). # # [MYSQL_CLUSTER] # ndb-connectstring=127.0.0.1 # # * 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/ Udostępnij ten post Link to postu Udostępnij na innych stronach
huan 18 Zgłoś post Napisano Grudzień 10, 2009 Ponieważ mysqltuner powiadomił, że tabele są pofragmentowane, to warto uruchomić na nich optymalizację: myisamchk -r --sort-index /var/lib/mysql/*/*.MYI mysqladmin reload;mysqladmin refresh; a w my.cnf proponowałbym następujące zmiany: # # indeksy zajmuja jedynie 62MB, wiec mozna spokojnie zmniejszyc # key_buffer do 96MB # key_buffer = 96M # # Zwiekszyc rozmiar tymczasowych tablic tworzonych w pamieci RAM, gdyz # za duze zapisywane sa niepotrzebnie na dysku, co spowalnia dzialanie # tmp_table_size = 128M max_heap_table_size = 128M # # bufor dla InnoDB jest za maly, trzeba zwiekszyc # innodb_buffer_pool_size = 64M Udostępnij ten post Link to postu Udostępnij na innych stronach
Elber 0 Zgłoś post Napisano Grudzień 10, 2009 Ponieważ mysqltuner powiadomił, że tabele są pofragmentowane, to warto uruchomić na nich optymalizację: myisamchk -r --sort-index /var/lib/mysql/*/*.MYI mysqladmin reload;mysqladmin refresh; a w my.cnf proponowałbym następujące zmiany: # # indeksy zajmuja jedynie 62MB, wiec mozna spokojnie zmniejszyc # key_buffer do 96MB # key_buffer = 96M # # Zwiekszyc rozmiar tymczasowych tablic tworzonych w pamieci RAM, gdyz # za duze zapisywane sa niepotrzebnie na dysku, co spowalnia dzialanie # tmp_table_size = 128M max_heap_table_size = 128M # # bufor dla InnoDB jest za maly, trzeba zwiekszyc # innodb_buffer_pool_size = 64M Ustawiłem tak jak napisałeś i teraz mam >> MySQLTuner 1.0.1 - Major Hayden <major@mhtx.net> >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering Please enter your MySQL administrative login: root Please enter your MySQL administrative password: -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.0.51a-24+lenny2-log [OK] Operating on 32-bit architecture with less than 2GB RAM -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 59M (Tables: 351) [--] Data in InnoDB tables: 53M (Tables: 271) [!!] Total fragmented tables: 3 -------- Performance Metrics ------------------------------------------------- [--] Up for: 2m 33s (2K q [17.131 qps], 495 conn, TX: 3M, RX: 302K) [--] Reads / Writes: 79% / 21% [--] Total buffers: 802.0M global + 2.6M per thread (100 max threads) [OK] Maximum possible memory usage: 1.0G (53% of installed RAM) [OK] Slow queries: 0% (0/2K) [OK] Highest usage of available connections: 9% (9/100) [OK] Key buffer size / total MyISAM indexes: 96.0M/57.9M [OK] Key buffer hit rate: 98.1% (529K cached / 9K reads) [!!] Query cache efficiency: 12.0% (192 cached / 1K selects) [OK] Query cache prunes per day: 0 [OK] Sorts requiring temporary tables: 0% (0 temp sorts / 146 sorts) [OK] Temporary tables created on disk: 19% (33 on disk / 172 total) [OK] Thread cache hit rate: 97% (14 created / 495 connections) [OK] Table cache hit rate: 49% (643 open / 1K opened) [OK] Open file limit used: 1% (741/65K) [OK] Table locks acquired immediately: 99% (1K immediate / 1K locks) [OK] InnoDB data size / buffer pool: 53.3M/64.0M -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance MySQL started within last 24 hours - recommendations may be inaccurate Variables to adjust: query_cache_limit (> 256M, or use smaller result sets) Na ile ustawić ten query_cache_limit ? query_cache_size mam na 512M Udostępnij ten post Link to postu Udostępnij na innych stronach
huan 18 Zgłoś post Napisano Grudzień 10, 2009 Wydaje mi się, że query_cache_size = 512M to zdecydowanie za dużo. Szkoda pamięci. Zostawiłbym tak jak było albo ostatecznie trochę zwiększyć query_cache_size = 128MB i query_cache_limit = 6M (ten parametr zalezy od tego, jak wielkie sa wyniki zapytan do bazy). Ale jak informował mysqltuner cache jest często czyszczony w Twoim przypadku, więc zmiana tych parametrów i tak wiele nie zmieni... chyba że właśnie dasz za dużo (np. 512M), to serwer może zacząć swapować. Udostępnij ten post Link to postu Udostępnij na innych stronach
Gość N3T5kY Zgłoś post Napisano Grudzień 11, 2009 Jak duża jest twoja baza danych? Bo w wątku nie widzę Udostępnij ten post Link to postu Udostępnij na innych stronach
Elber 0 Zgłoś post Napisano Grudzień 16, 2009 Na serwerze jest kilkanaście stron i kilkanaście baz danych To wynik wykonany po paru dniach od zmiany ustawień: -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.0.51a-24+lenny2-log [OK] Operating on 32-bit architecture with less than 2GB RAM -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 65M (Tables: 351) [--] Data in InnoDB tables: 86M (Tables: 271) [!!] Total fragmented tables: 30 -------- Performance Metrics ------------------------------------------------- [--] Up for: 5d 19h 51m 19s (3M q [6.361 qps], 144K conn, TX: 829M, RX: 569M) [--] Reads / Writes: 53% / 47% [--] Total buffers: 418.0M global + 2.6M per thread (100 max threads) [OK] Maximum possible memory usage: 680.5M (34% of installed RAM) [OK] Slow queries: 0% (0/3M) [OK] Highest usage of available connections: 15% (15/100) [OK] Key buffer size / total MyISAM indexes: 96.0M/66.9M [OK] Key buffer hit rate: 100.0% (587M cached / 78K reads) [OK] Query cache efficiency: 33.1% (585K cached / 1M selects) [!!] Query cache prunes per day: 57852 [OK] Sorts requiring temporary tables: 0% (5 temp sorts / 158K sorts) [!!] Temporary tables created on disk: 27% (30K on disk / 111K total) [OK] Thread cache hit rate: 99% (321 created / 144K connections) [OK] Table cache hit rate: 98% (722 open / 732 opened) [OK] Open file limit used: 1% (805/65K) [OK] Table locks acquired immediately: 99% (2M immediate / 2M locks) [!!] InnoDB data size / buffer pool: 86.6M/64.0M -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance When making adjustments, make tmp_table_size/max_heap_table_size equal Reduce your SELECT DISTINCT queries without LIMIT clauses Variables to adjust: query_cache_size (> 128M) tmp_table_size (> 128M) max_heap_table_size (> 128M) innodb_buffer_pool_size (>= 86M) Co teraz zrobić / zmienić i na ile ? Udostępnij ten post Link to postu Udostępnij na innych stronach
huan 18 Zgłoś post Napisano Grudzień 17, 2009 Jeśli serwer nie swapuje i masz jeszcze trochę wolnej pamięci, to możesz zwiększyć: tmp_table_size = 256M max_heap_table_size = 256M innodb_buffer_pool_size = 128M Udostępnij ten post Link to postu Udostępnij na innych stronach
Elber 0 Zgłoś post Napisano Grudzień 30, 2009 Teraz mam wynik z innego serwera. Są na nim 2 fora jedno małe drugie troszkę większe. Fora są oparte o skrypt vBulletin. Rozmiar większej bazy to 90 MB a mniejszej to 20 MB. Jak mam ustawić poszczególne wartości w my.cnf żeby było najoptymalniej. MY.CNF # # 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/doc/mysql/en/server-system-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 language = /usr/share/mysql/english 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 = 8M max_allowed_packet = 8M thread_stack = 128K thread_cache_size = 128K # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP wait_timeout = 30 #max_connections = 100 table_cache = 8M tmp_table_size = 32M max_heap_table_size = 32M #thread_concurrency = 10 # # * Query Cache Configuration # query_cache_limit = 8M query_cache_size = 32M join_buffer_size = 16M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. #log = /var/log/mysql/mysql.log # # Error logging goes to syslog. This is a Debian improvement # # Here you can see queries with especially long duration #log_slow_queries = /var/log/mysql/mysql-slow.log log-slow-queries = /var/log/mysql/log-slow-queries.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 # # * BerkeleyDB # # Using BerkeleyDB is now discouraged as its support will cease in 5.1.12. skip-bdb # # * 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! # You might want to disable InnoDB to shrink the mysqld process by circa 100MB. #skip-innodb # # * 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 innodb_buffer_pool_size = 32M [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 32M # # * NDB Cluster # # See /usr/share/doc/mysql-server-*/README.Debian for more information. # # The following configuration is read by the NDB Data Nodes (ndbd processes) # not from the NDB Management Nodes (ndb_mgmd processes). # # [MYSQL_CLUSTER] # ndb-connectstring=127.0.0.1 # # * 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/ Wynik mysqltuner.pl -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.0.51a-24+lenny2-log [OK] Operating on 32-bit architecture with less than 2GB RAM -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 81M (Tables: 364) [--] Data in InnoDB tables: 96K (Tables: 6) [--] Data in MEMORY tables: 252K (Tables: 4) [!!] Total fragmented tables: 15 -------- Performance Metrics ------------------------------------------------- [--] Up for: 4m 59s (6K q [20.706 qps], 899 conn, TX: 267M, RX: 1M) [--] Reads / Writes: 87% / 13% [--] Total buffers: 106.0M global + 18.5M per thread (100 max threads) [!!] Maximum possible memory usage: 1.9G (97% of installed RAM) [OK] Slow queries: 0% (0/6K) [OK] Highest usage of available connections: 5% (5/100) [OK] Key buffer size / total MyISAM indexes: 8.0M/25.7M [OK] Key buffer hit rate: 99.5% (159K cached / 753 reads) [OK] Query cache efficiency: 54.2% (2K cached / 4K selects) [OK] Query cache prunes per day: 0 [OK] Sorts requiring temporary tables: 0% (0 temp sorts / 336 sorts) [!!] Joins performed without indexes: 2 [OK] Temporary tables created on disk: 9% (22 on disk / 236 total) [OK] Thread cache hit rate: 99% (5 created / 899 connections) [OK] Table cache hit rate: 98% (397 open / 403 opened) [OK] Open file limit used: 1% (768/65K) [OK] Table locks acquired immediately: 99% (3K immediate / 3K locks) [OK] InnoDB data size / buffer pool: 96.0K/32.0M -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance MySQL started within last 24 hours - recommendations may be inaccurate Reduce your overall MySQL memory footprint for system stability Adjust your join queries to always utilize indexes Variables to adjust: *** MySQL's maximum memory usage is dangerously high *** *** Add RAM before increasing MySQL buffer variables *** join_buffer_size (> 16.0M, or always use indexes with joins) Udostępnij ten post Link to postu Udostępnij na innych stronach
Gość N3T5kY Zgłoś post Napisano Grudzień 31, 2009 Zacznij od tego wget http://day32.com/MySQL/[i]tuning[/i]-[i]primer[/i].sh; sh tuning-primer.sh I zmień na ustawienia jakie doradzi ci skrypt. Mysql musi działać 48h aby test był obiektywny. Udostępnij ten post Link to postu Udostępnij na innych stronach
huan 18 Zgłoś post Napisano Grudzień 31, 2009 Jeśli fora działają na vBulletinie, to zainstaluj sobie XCache ( http://xcache.lighttpd.net ), a w pliku konfiguracyjnym includes/config.php ustaw: $config['Datastore']['class'] = 'vB_Datastore_XCache'; nie dość, że xcache przyśpieszy kilkukrotnie uruchamianie skryptów php, to jeszcze z pomocą tego wpisu w konfiguracji najczęstsze zapytaqnia do serwera MySQL będą cacheowane w pamięci podręcznej XCache (zmniejsza przynajmniej o połowę liczbę zapytań do serwera baz danych. Udostępnij ten post Link to postu Udostępnij na innych stronach
Elber 0 Zgłoś post Napisano Grudzień 31, 2009 Zainstalowałem ten xcache z repozytoriów i mi vB wywala Warning: xcache_isset() [function.xcache-isset]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 557 Warning: xcache_isset() [function.xcache-isset]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 557 Warning: xcache_unset() [function.xcache-unset]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 596 Warning: xcache_set() [function.xcache-set]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 597 Warning: xcache_unset() [function.xcache-unset]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 596 Warning: xcache_set() [function.xcache-set]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 597 Warning: xcache_unset() [function.xcache-unset]: xcache.var_size is either 0 or too small to enable var data caching in [path]/includes/class_datastore.php on line 596 Udostępnij ten post Link to postu Udostępnij na innych stronach
malu 460 Zgłoś post Napisano Grudzień 31, 2009 xcache.optimizer na on + daj jakieś 16M dla var cache Udostępnij ten post Link to postu Udostępnij na innych stronach
Elber 0 Zgłoś post Napisano Grudzień 31, 2009 Kurde zmieniałem nie ten size co miałem Dzięki Would you like me to create a ~/.my.cnf file for you? [y/N] : N -- MYSQL PERFORMANCE TUNING PRIMER -- - By: Matthew Montgomery - MySQL Version 5.0.51a-24+lenny2-log i486 Uptime = 0 days 16 hrs 55 min 41 sec Avg. qps = 11 Total Questions = 725330 Threads Connected = 1 Warning: Server has not been running for at least 48hrs. It may not be safe to use these recommendations To find out more information on how each of these runtime variables effects performance visit: http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html Visit http://www.mysql.com/products/enterprise/advisors.html for info about MySQL's Enterprise Monitoring and Advisory Service SLOW QUERIES The slow query log is enabled. Current long_query_time = 10 sec. You have 0 out of 725351 that take longer than 10 sec. to complete Your long_query_time seems to be fine BINARY UPDATE LOG The binary update log is NOT enabled. You will not be able to do point in time recovery See http://dev.mysql.com/doc/refman/5.0/en/point-in-time-recovery.html WORKER THREADS Current thread_cache_size = 16384 Current threads_cached = 10 Current threads_per_sec = 0 Historic threads_per_sec = 0 Your thread_cache_size is fine MAX CONNECTIONS Current max_connections = 100 Current threads_connected = 1 Historic max_used_connections = 11 The number of used connections is 11% of the configured maximum. Your max_connections variable seems to be fine. INNODB STATUS Current InnoDB index space = 160 K Current InnoDB data space = 96 K Current InnoDB buffer pool free = 96 % Current innodb_buffer_pool_size = 32 M Depending on how much space your innodb indexes take up it may be safe to increase this value to up to 2 / 3 of total system memory MEMORY USAGE Max Memory Ever Allocated : 277 M Configured Max Per-thread Buffers : 1.80 G Configured Max Global Buffers : 74 M Configured Max Memory Limit : 1.87 G Physical Memory : 1.95 G nMax memory limit exceeds 90% of physical memory KEY BUFFER Current MyISAM index space = 25 M Current key_buffer_size = 8 M Key cache miss rate is 1 : 1040 Key buffer free ratio = 4 % You could increase key_buffer_size It is safe to raise this up to 1/4 of total system memory; assuming this is a dedicated database server. QUERY CACHE Query cache is enabled Current query_cache_size = 32 M Current query_cache_used = 16 M Current query_cache_limit = 8 M Current Query cache Memory fill ratio = 50.48 % Current query_cache_min_res_unit = 4 K MySQL won't cache query results that are larger than query_cache_limit in size SORT OPERATIONS Current sort_buffer_size = 2 M Current read_rnd_buffer_size = 256 K Sort buffer seems to be fine JOINS Current join_buffer_size = 16.00 M You have had 333 queries where a join could not use an index properly join_buffer_size >= 4 M This is not advised You should enable "log-queries-not-using-indexes" Then look for non indexed joins in the slow query log. OPEN FILES LIMIT Current open_files_limit = 65535 files The open_files_limit should typically be set to at least 2x-3x that of table_cache if you have heavy MyISAM usage. Your open_files_limit value seems to be fine TABLE CACHE Current table_cache value = 32712 tables You have a total of 391 tables You have 423 open tables. The table_cache value seems to be fine TEMP TABLES Current max_heap_table_size = 32 M Current tmp_table_size = 32 M Of 11053 temp tables, 3% were created on disk Created disk tmp tables ratio seems fine TABLE SCANS Current read_buffer_size = 128 K Current table scan ratio = 1858 : 1 read_buffer_size seems to be fine TABLE LOCKING Current Lock Wait ratio = 1 : 2644 You may benefit from selective use of InnoDB. If you have long running SELECT's against MyISAM tables and perform frequent updates consider setting 'low_priority_updates=1' If you have a high concurrency of inserts on Dynamic row-length tables consider setting 'concurrent_insert=2'. Udostępnij ten post Link to postu Udostępnij na innych stronach