的my.cnf RAM吃每4小時1個G RAM

Question

請幫助

[mysql_safe] 
open-files-limit = 16192 
skip-name-resolve 
[mysqld] 
max_connections=8000 
max_user_connections=8000 
interactive_timeout=180 
wait_timeout=180 
connect_timeout=180 
local-infile=0 
thread_concurrency = 16 
key_buffer = 2400M 
max_allowed_packet = 24M 
join_buffer_size = 4M 
sort_buffer_size = 1M 
read_buffer_size = 4M 
read_rnd_buffer_size = 4M 
myisam_sort_buffer_size = 16M 
table_cache = 5096M 
table_open_cache= 4000 
table_definition_cache= 5096M 
thread_cache_size = 5096M 
query_cache_size = 5096M 
query_cache_limit= 5096M 
tmp_table_size = 5096M 
max_heap_table_size = 5096M 
innodb_flush_log_at_trx_commit=2 
innodb_buffer_pool_size = 8G 
innodb_additional_mem_pool_size = 20M 
innodb_log_buffer_size = 12M 
innodb_thread_concurrency = 8 
innodb_flush_method = O_DIRECT 

[mysql] 
no-auto-rehash 

[mysqlhotcopy] 
interactive-timeout 

我運行tuning-primer.sh

SLOW QUERIES 
The slow query log is NOT enabled. 
Current long_query_time = 10.000000 sec. 
You have 99 out of 1395484 that take longer than 10.000000 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/5.5/en/point-in-time-recovery.html 

WORKER THREADS 
Current thread_cache_size = 16384 
Current threads_cached = 49 
Current threads_per_sec = 0 
Historic threads_per_sec = 0 
Your thread_cache_size is fine 

MAX CONNECTIONS 
Current max_connections = 8000 
Current threads_connected = 8 
Historic max_used_connections = 55 
The number of used connections is 0% 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 

INNODB STATUS 
Current InnoDB index space = 5.46 G 
Current InnoDB data space = 10.26 G 
Current InnoDB buffer pool free = 68 % 
Current innodb_buffer_pool_size = 8.00 G 
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 : 23.55 G 
Configured Max Per-thread Buffers : 103.51 G 
Configured Max Global Buffers : 22.84 G 
Configured Max Memory Limit : 126.35 G 
Physical Memory : 23.53 G 

Max memory limit exceeds 90% of physical memory 

KEY BUFFER 
Current MyISAM index space = 2.02 G 
Current key_buffer_size = 9.83 G 
Key cache miss rate is 1 : 127 
Key buffer free ratio = 80 % 
Your key_buffer_size seems to be fine 

QUERY CACHE 
Query cache is enabled 
Current query_cache_size = 4.97 G 
Current query_cache_used = 244 M 
Current query_cache_limit = 4.97 G 
Current Query cache Memory fill ratio = 4.79 % 
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 = 1 M 
Current read_rnd_buffer_size = 4 M 
Sort buffer seems to be fine 

JOINS 
Current join_buffer_size = 4.00 M 
You have had 27 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 = 40000 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_open_cache = 4000 tables 
Current table_definition_cache = 524288 tables 
You have a total of 9060 tables 
You have 4000 open tables. 
Current table_cache hit rate is 3% 
, while 100% of your table cache is in use 
You should probably increase your table_cache 

TEMP TABLES 
Current max_heap_table_size = 4.97 G 
Current tmp_table_size = 4.97 G 
Of 7519 temp tables, 17% were created on disk 
Created disk tmp tables ratio seems fine 

TABLE SCANS 
Current read_buffer_size = 4 M 
Current table scan ratio = 460 : 1 
read_buffer_size seems to be fine 

TABLE LOCKING 
Current Lock Wait ratio = 1 : 361 
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=ALWAYS'. 

後，請幫助我有問題，RAM它的每一個4小時吃1剋日RAM 後，我用18G 24G從

請任何一個幫助我的my.cnf配置我有16核CPU

mysql：5.5.22

Answer 1

如果您在MySQL性能方面遇到問題，請在您的服務器上運行mysqltuner作爲第一步。