Re: MySQL using 80-90% of CPU

[prakash gr]

Hi,

same problem we are also facing simple query consuming 80% of cpu:

i have checked the slow running queries and i felt queries doing the right thing(selecting index)

bash-2.05# uname -a
SunOS drportal 5.9 Generic_118558-08 sun4u sparc SUNW,Sun-Fire-V240

Physical ram : 2 gb

mysql> show variables like '%version%';
+-------------------------+------------------------------+
| Variable_name           | Value                        |
+-------------------------+------------------------------+
| protocol_version        | 10                           |
| version                 | 5.0.77-log                   |
| version_comment         | MySQL Community Server (GPL) |
| version_compile_machine | sparc                        |
| version_compile_os      | sun-solaris2.9               |
+-------------------------+------------------------------+
5 rows in set (0.00 sec)


my.cnf:


[client]

port            = 3306
socket          = /tmp/mysql.sock
default_character_set  = utf8


# The MySQL server
[mysqld]
transaction_isolation = READ-UNCOMMITTED
skip-name-resolve
max_connections=101
default-storage-engine=INNODB
basedir=/opt/mysql/mysql/
datadir=/oratranslog/mysql/
log-slow-queries = slow.log
long_query_time=2
log_queries_not_using_indexes
long_query_time = 5
port            = 3306
lower_case_table_names=1
socket          = /tmp/mysql.sock
skip-locking
key_buffer = 384M
max_heap_table_size = 50M
max_allowed_packet = 50M
table_cache = 512
sort_buffer_size = 15M
read_rnd_buffer_size = 15M
thread_cache_size = 8
query_cache_size = 30M
join_buffer_size = 10M
thread_concurrency = 8
collation_server=utf8_unicode_ci
character_set_server = utf8
skip-character-set-client-handshake
skip-federated
server-id       = 1
innodb_data_home_dir = /oratranslog/mysql/
innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
innodb_log_group_home_dir = /oratranslog/mysql/
innodb_log_arch_dir = /oratranslog/mysql/
innodb_buffer_pool_size = 1000M
innodb_additional_mem_pool_size = 10M
innodb_log_file_size = 100M
innodb_log_buffer_size = 50M
innodb_flush_log_at_trx_commit = 2
innodb_thread_concurrency= 10
innodb_flush_method = O_DIRECT
[mysqldump]
quick
[mysql]
no-auto-rehash
default-character-set=utf8
[isamchk]
key_buffer = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

appreciated is some one advice to tune.

Thanks

Prakash GR