my.cnf ayarı :(

P4 3.2 ghz
2 gb ram

gibi bi sisteme nasıl bi my.cnf ayarı yapılır >

Makina özelliklerine göre my.cnf yazarım fakat sağlıklı olmaz. çünkü
MySQL kullanım yogunlugu yaratılan indexlerin yetip yetmediği uzun süren sorgular vb. gibi bir çok fonksiyonlardan etkilenen ince ayar gerektiren bir veritabanı.

Öncelikle MySQL sunucunuzu minimum 2 gün ( 48 saat ) çalıştırın huyunu suyunu kavrasın makina

daha sonra

Kurulum:

SSH root olarak giriş yapın ve aşağıdaki komutu yazın,

wget http://day32.com/MySQL/tuning-primer.sh

Ardından CHMOD düzenleyin

chmod 775 tuning-primer.sh

MYSQL durum sınaması için yapmamız gereken ,

./tuning-primer.sh

Çalıştırın ve Çıkanları buraya yapıştırın. böylece Kullanımınıza göre güzel bir ayar verebilirim.

[mysqld]
old_passwords=1
skip-bdb
safe-show-database
innodb_data_file_path=ibdata1:10M:autoextend
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
table_cache = 1024
max_connections = 1000
query-cache-type = 1
query-cache-size = 32M
max_allowed_packet=64M
safe-show-database
set-variable=local-infile=0
max_allowed_packet = 32M
[mysql.server]
user=mysql
basedir=/var/lib

böyle bi ayar sisteminize uyar...

sisteminde kac adet mysql in ne kadar sıklıkla calıştıgı ne kadar buffer a ne kadar belleğe ve ne kadar index e ihtiyaci olduğunu nerden biliyorsunuz ?

O yüzden Lütfen hazır conf lar vermeyin Mysql tuning script 'ini Çalıştırıp sisteminize uygun olan cnf ları üretin.

-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -

MySQL Version 4.1.20 i686

Uptime = 3 days 18 hrs 27 min 41 sec
Avg. qps = 4
Total Questions = 1416598
Threads Connected = 1

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:
MySQL :: MySQL 3.23, 4.0, 4.1 Reference Manual :: 5.1.3 System Variables
Visit MySQL :: MySQL Enterprise Advisors
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 2 out of 1416612 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 MySQL :: MySQL 3.23, 4.0, 4.1 Reference Manual :: 6.3 Point-in-Time Recovery

WORKER THREADS
Current thread_cache_size = 0
Current threads_cached = 0
Current threads_per_sec = 1
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 1000
Current threads_connected = 1
Historic max_used_connections = 11
The number of used connections is 1% 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 : 79 M
Configured Max Per-thread Buffers : 2 G
Configured Max Global Buffers : 49 M
Configured Max Memory Limit : 2 G
Physical Memory : 1.97 G

Max memory limit exceeds 90% of physical memory

KEY BUFFER
Current MyISAM index space = 830 M
Current key_buffer_size = 7 M
Key cache miss rate is 1 : 15
Key buffer fill ratio = 99.00 %
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 enabled
Current query_cache_size = 32 M
Current query_cache_used = 27 M
Current query_cache_limit = 1 M
Current Query cache Memory fill ratio = 86.10 %
Current query_cache_min_res_unit = 4 K
However, 49591 queries have been removed from the query cache due to lack of memory
Perhaps you should raise query_cache_size
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 = 132.00 K
You have had 29 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 = 5010 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 1855 tables
You have 1024 open tables.
Current table_cache hit rate is 11%, 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 39500 temp tables, 9% 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 = 128 K
Current table scan ratio = 2295 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 501
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'

top yazdığımda böyle gösterio yukarıdaki bilgiler

Mem: 2067104k total, 1937456k used, 129648k free, 68864k buffers
Swap: 4128696k total, 6004k used, 4122692k free, 1336804k cached

[root@server ~]# ./tuning-primer.sh
mysqld is alive

-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -

MySQL Version 5.0.51a-community-log x86_64

Uptime = 0 days 10 hrs 49 min 56 sec
Avg. qps = 66
Total Questions = 2611928
Threads Connected = 6

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:
MySQL :: MySQL 5.0 Reference Manual :: 5.1.3 System Variables
Visit MySQL :: MySQL Enterprise Advisors
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 46 out of 2611957 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 enabled
The expire_logs_days is not set.
The mysqld will retain the entire binary log until RESET MASTER or PURGE MASTER LOGS commands are run manually
Setting expire_logs_days will allow you to remove old binary logs automatically
See MySQL :: MySQL 5.0 Reference Manual :: 12.6.1.1 PURGE MASTER LOGS Syntax

WORKER THREADS
Current thread_cache_size = 8
Current threads_cached = 4
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 = 8
Historic max_used_connections = 47
The number of used connections is 47% of the configured maximum.
Your max_connections variable seems to be fine.

MEMORY USAGE
Max Memory Ever Allocated : 1008 M
Configured Max Per-thread Buffers : 1 G
Configured Max Global Buffers : 426 M
Configured Max Memory Limit : 1 G
Physical Memory : 3.84 G
Max memory limit seem to be within acceptable norms

KEY BUFFER
Current MyISAM index space = 475 M
Current key_buffer_size = 384 M
Key cache miss rate is 1 : 1453
Key buffer fill ratio = 9.00 %
Your key_buffer_size seems to be too high.
Perhaps you can use these resources elsewhere

QUERY CACHE
Query cache is enabled
Current query_cache_size = 32 M
Current query_cache_used = 27 M
Current query_cache_limit = 1 M
Current Query cache Memory fill ratio = 85.46 %
Current query_cache_min_res_unit = 4 K
However, 269286 queries have been removed from the query cache due to lack of memory
Perhaps you should raise query_cache_size
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 = 7 M
Sort buffer seems to be fine

JOINS
Current join_buffer_size = 132.00 K
You have had 822 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 = 1134 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
You currently have open more than 75% of your open_files_limit
You should set a higher value for open_files_limit in my.cnf

TABLE CACHE
Current table_cache value = 512 tables
You have a total of 5249 tables
You have 512 open tables.
Current table_cache hit rate is 2%, 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 92921 temp tables, 33% 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 = 1 M
Current table scan ratio = 832 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 644
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'.


bende cıkan sonuc budur bazı yerlerde sorun var sanırım

bilgiislem yeni konu açmayı denesen

sizin için my.cnf ayarı