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Posty napisane przez sleek


  1. Mam mysqltuner.pl i tuning- primer zainstalowany.

     

    Dostosowuje konfiguracje ale to niewiele zmienia.

     

    Zoptymalizowałem bazę za pomocą tej komendy którą podałeś. Dzięki.

     

    Jak mogę ustawić te sztywne parametry użycia ram ?

     

    Tak jeszcze dodam :

     

    To jest mój wynik z tuning- primera

     

    -- MYSQL PERFORMANCE TUNING PRIMER --
    		 - By: Matthew Montgomery -
    MySQL Version 5.0.51a-24+lenny5-log x86_64
    Uptime = 0 days 11 hrs 54 min 38 sec
    Avg. qps = 246
    Total Questions = 10569051
    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 = 5 sec.
    You have 2 out of 10569080 that take longer than 5 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 = 256
    Current threads_cached = 26
    Current threads_per_sec = 0
    Historic threads_per_sec = 0
    Your thread_cache_size is fine
    MAX CONNECTIONS
    Current max_connections = 200
    Current threads_connected = 2
    Historic max_used_connections = 28
    The number of used connections is 14% of the configured maximum.
    Your max_connections variable seems to be fine.
    INNODB STATUS
    Current InnoDB index space = 2 M
    Current InnoDB data space = 2 M
    Current InnoDB buffer pool free = 41 %
    Current innodb_buffer_pool_size = 8 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 : 402 M
    Configured Max Per-thread Buffers : 1.51 G
    Configured Max Global Buffers : 186 M
    Configured Max Memory Limit : 1.69 G
    Physical Memory : 8.00 G
    Max memory limit seem to be within acceptable norms
    KEY BUFFER
    Current MyISAM index space = 103 M
    Current key_buffer_size = 128 M
    Key cache miss rate is 1 : 3406
    Key buffer free ratio = 72 %
    Your key_buffer_size seems to be fine
    QUERY CACHE
    Query cache is enabled
    Current query_cache_size = 48 M
    Current query_cache_used = 6 M
    Current query_cache_limit = 8 M
    Current Query cache Memory fill ratio = 13.36 %
    Current query_cache_min_res_unit = 4 K
    Your query_cache_size seems to be too high.
    Perhaps you can use these resources elsewhere
    MySQL won't cache query results that are larger than query_cache_limit in size
    SORT OPERATIONS
    Current sort_buffer_size = 3 M
    Current read_rnd_buffer_size = 256 K
    Sort buffer seems to be fine
    JOINS
    Current join_buffer_size = 2.00 M
    You have had 5 queries where a join could not use an index properly
    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 = 2258 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 = 1024 tables
    You have a total of 301 tables
    You have 345 open tables.
    The table_cache value seems to be fine
    TEMP TABLES
    Current max_heap_table_size = 16 M
    Current tmp_table_size = 16 M
    Of 239060 temp tables, 38% were created on disk
    Perhaps you should increase your tmp_table_size and/or max_heap_table_size
    to reduce the number of disk-based temporary tables
    Note! BLOB and TEXT columns are not allow in memory tables.
    If you are using these columns raising these values might not impact your
    ratio of on disk temp tables.
    TABLE SCANS
    Current read_buffer_size = 1 M
    Current table scan ratio = 99 : 1
    read_buffer_size seems to be fine
    TABLE LOCKING
    Current Lock Wait ratio = 1 : 1115
    You may benefit from selective use of InnoDB.
    If you have a high concurrency of inserts on Dynamic row-length tables
    consider setting 'concurrent_insert=2'.
    

     

     

    A to drugi wynik

     

    -------- General Statistics --------------------------------------------------
    [--] Skipped version check for MySQLTuner script
    [OK] Currently running supported MySQL version 5.0.51a-24+lenny5-log
    [OK] Operating on 64-bit architecture
    -------- Storage Engine Statistics -------------------------------------------
    [--] Status: +Archive -BDB +Federated +InnoDB -ISAM -NDBCluster
    [--] Data in MyISAM tables: 353M (Tables: 154)
    [--] Data in InnoDB tables: 2M (Tables: 130)
    [!!] Total fragmented tables: 6
    -------- Security Recommendations  -------------------------------------------
    [OK] All database users have passwords assigned
    -------- Performance Metrics -------------------------------------------------
    [--] Up for: 11h 58m 52s (10M q [247.160 qps], 33K conn, TX: 35B, RX: 2B)
    [--] Reads / Writes: 88% / 12%
    [--] Total buffers: 202.0M global + 7.7M per thread (200 max threads)
    [OK] Maximum possible memory usage: 1.7G (21% of installed RAM)
    [OK] Slow queries: 0% (2/10M)
    [OK] Highest usage of available connections: 14% (28/200)
    [OK] Key buffer size / total MyISAM indexes: 128.0M/103.7M
    [OK] Key buffer hit rate: 100.0% (3B cached / 1M reads)
    [OK] Query cache efficiency: 71.7% (7M cached / 10M selects)
    [!!] Query cache prunes per day: 2570311
    [OK] Sorts requiring temporary tables: 0% (1K temp sorts / 346K sorts)
    [!!] Temporary tables created on disk: 38% (151K on disk / 392K total)
    [OK] Thread cache hit rate: 99% (28 created / 33K connections)
    [OK] Table cache hit rate: 42% (349 open / 822 opened)
    [OK] Open file limit used: 17% (391/2K)
    [OK] Table locks acquired immediately: 99% (4M immediate / 4M locks)
    [OK] InnoDB data size / buffer pool: 2.1M/8.0M
    -------- Recommendations -----------------------------------------------------
    General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    MySQL started within last 24 hours - recommendations may be inaccurate
    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 (> 48M)
    tmp_table_size (> 16M)
    max_heap_table_size (> 16M)
    

     

     

     

    Właściwie to nie rozumiem dlaczego chce zapisywać do tmp skoro ma wolny ram w systemie z którego mogło by korzystać,


  2. Witam serdecznie,

     

    otóż posiadam portal oparty na cms Drupal. Jest on dosyć rozbudowany ( baza z tabelami Cache ma ponad 300MB. ( www.podrywaj.org tematyka trochę nietypowa ;P)

     

    Korzystam z usług server4you.net

     

    Mam opcję vSERVER Cloud Premium X4 cokolwiek to znaczy.

    • 5,000 MHz Prozessor-Power
    • 4,096 MB DDR-RAM / 8,192 MB FlexRAM

    Mam tam Debiana + lenny

    Często w godzinach szczytu mojego serwisu sypią się błędy, bywa tak że nie mogę się zalogować przez SSH Klienta. Przy próbie wywoływania komend potrafią się pojawić komunikaty "can't allocate memory." Mimo tego że zużycie w tym momencie wynosi np. 2GB. Właściwie nie widziałem żeby server wykorzystywał więcej niż 4 GB. Często też pojawiają się komunikaty o braku możliwości zapisania pliku. Tak jak by był jakiś limit czasowy.

     

    Testowałem różne konfiguracje jakie podsuwał mi tuning-primer. W tej chwili obecnej mam tu ustawione tak :

     

    [mysqld]
    set-variable=local-infile=0
    #
    # * 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  = 128M
    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		    = 850
    #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.
    #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
    #long_query_time = 5
    #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
    [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/
    

     

    Ktoś mi podpowiedział by użyć komendy cat /proc/user_beancounters

     

    Dało to taki wynik :

     

    Version: 2.5
       uid  resource					 held			  maxheld			  barrier			    limit			  failcnt
    10004485:  kmemsize				 51393770			 71725291			 71147520			 79052800		    280647180
    	    lockedpages					 0				  439				 2670				 2670				  291
    	    privvmpages			    520186			  1268389			  2097152			  2306867				    0
    	    shmpages				    65249			    65585			   131072			   131072				  522
    	    dummy						   0				    0  9223372036854775807  9223372036854775807				    0
    	    numproc					   140				  223				  800				  800				    0
    	    physpages				  349149			  1123971				    0  9223372036854775807				    0
    	    vmguarpages					 0				    0			  1048576  9223372036854775807				    0
    	    oomguarpages			   349329			  1123995			  1048576  9223372036854775807				    0
    	    numtcpsock					 70				  324				 1800				 1800				    0
    	    numflock					   14				   53				 1000				 1100				    0
    	    numpty						  1				    3				   66				   66				    0
    	    numsiginfo					  0				  154				 1024				 1024				    0
    	    tcpsndbuf				 1193840			  5031080			  9582922			 13674826		   1849532731
    	    tcprcvbuf				 1012552			  3595120			  9582922			 13674826				    0
    	    othersockbuf			   209520			  1657512			  3194307			  5922243				 5313
    	    dgramrcvbuf					 0			    47856			  3194307			  3194307				    0
    	    numothersock				  126				  422				 1800				 1800				  102
    	    dcachesize			    1677474			  2063683			  8515584			  9461760				    0
    	    numfile					  4215				 8000			    12000			    12000				  605
    	    dummy						   0				    0				    0				    0				    0
    	    dummy						   0				    0				    0				    0				    0
    	    dummy						   0				    0				    0				    0				    0
    	    numiptent					  10				   10				  192				  192				    0
    

     

    Testowałem również eAkcelelator PHP. Zużycie Ramu było mniejsze jednak błędy i tak występowały. Stąd też moje pytanie. Co mogę zrobić żeby uniknąć tych błędów w godzinach szczytu? Czy ten serwer wymaga jakiejś dodatkowej konfiguracji ? Proszę o porady.

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