Optimizar my.cnf

kaehana · 26-may-2008, 11:05

Hola a todos este es mi primer mensaje aunque hace mucho que os leo.
Querría optimizar mi my.cnf porque en el actual solo aparecen los siguientes valores:

Cita:

[mysqld]
set-variable = max_connections=500
safe-show-database

Mi servidor es un Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz con 4GB de memoria RAM.
Me gustaría que me aconsejarais algún modelo de my.cnf y a partir de ese archivo hacer las optimizaciones posteriores.
Si es de ayuda he instalado tuning-primer y este es el resultado con más de 48 horas en funcionando:

Cita:

SLOW QUERIES
The slow query log is NOT enabled.
Current long_query_time = 10 sec.
You have 65 out of 25525770 that take longer than 10 sec. to complete
Your long_query_time may be too high, I typically set this under 5 sec.

WORKER THREADS
Current thread_cache_size = 0
Current threads_cached = 0
Current threads_per_sec = 2
Historic threads_per_sec = 2
Threads created per/sec are overrunning threads cached
You should raise thread_cache_size

MAX CONNECTIONS
Current max_connections = 500
Current threads_connected = 1
Historic max_used_connections = 106
The number of used connections is 21% of the configured maximum.
Your max_connections variable seems to be fine.

MEMORY USAGE
Max Memory Ever Allocated : 309 M
Configured Max Per-thread Buffers : 1 G
Configured Max Global Buffers : 17 M
Configured Max Memory Limit : 1 G
Physical Memory : 3.61 G
Max memory limit seem to be within acceptable norms

KEY BUFFER
Current MyISAM index space = 38 M
Current key_buffer_size = 7 M
Key cache miss rate is 1 : 1225
Key buffer fill ratio = 100.00 %
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 supported but not enabled
Perhaps you should set the query_cache_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 = 132.00 K
You have had 0 queries where a join could not use an index properly
Your joins seem to be using indexes properly

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 = 64 tables
You have a total of 104 tables
You have 64 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 136498 temp tables, 39% were created on disk
Effective in-memory tmp_table_size is limited to max_heap_table_size.
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 = 128 K
Current table scan ratio = 220 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 2271
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'.

Gracias

Apolo · 28-may-2008, 04:29

Hola,

¿El servidor viene funcionando ya de tiempo atrás?

¿Cuál es el uso del servidor?

¿Estás teniendo problemas de rendimiento?

Saludos,