嗨我的服务器CPU使用280%我的cnf文件
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
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
lc-messages-dir = /usr/share/mysql
skip-external-locking
bind-address = 127.0.0.1
thread_stack = 192K
thread_cache_size = 32
myisam-recover-options = BACKUP
query_cache_limit = 128M
log_error = /var/log/mysql/error.log
expire_logs_days = 1
max_connections = 500
max_user_connections = 500
sort_buffer_size = 2M
key_buffer_size = 128M
tmp_table_size = 128M
innodb_log_file_size = 16M
skip-name-resolve=1
max_connect_errors = 100
concurrent_insert = 2
connect_timeout = 30
query_cache_size = 32M
query_cache_type = 0
table_open_cache = 12000
open_files_limit=24000
wait_timeout = 14400
interactive_timeout = 14400
low_priority_updates = 1
read_buffer_size = 5M
log_queries_not_using_indexes = 1
我的mysql tunner输出
>> MySQLTuner 1.7.7 - Major Hayden
>> Bug reports, feature requests, and downloads at http://mysqltuner.com/
>> Run with '--help' for additional options and output filtering
[--] Skipped version check for MySQLTuner script
[OK] Logged in using credentials from debian maintenance account.
[OK] Currently running supported MySQL version 5.7.21-0ubuntu0.16.04.1
[OK] Operating on 64-bit architecture
-------- Log file Recommendations ------------------------------------------------------------------
[--] Log file: /var/log/mysql/error.log(83K)
[OK] Log file /var/log/mysql/error.log exists
[OK] Log file /var/log/mysql/error.log is readable.
[OK] Log file /var/log/mysql/error.log is not empty
[OK] Log file /var/log/mysql/error.log is smaller than 32 Mb
-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in MyISAM tables: 120M (Tables: 4)
[--] Data in InnoDB tables: 106M (Tables: 53)
[OK] Total fragmented tables: 0
-------- Security Recommendations ------------------------------------------------------------------
[OK] There are no anonymous accounts for any database users
[OK] All database users have passwords assigned
[!!] User 'root@%' hasn't specific host restriction.
[--] There are 612 basic passwords in the list.
-------- CVE Security Recommendations --------------------------------------------------------------
[OK] NO SECURITY CVE FOUND FOR YOUR VERSION
-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 10m 44s (77K q [120.610 qps], 9K conn, TX: 754M, RX: 89M)
[--] Reads / Writes: 78% / 22%
[--] Binary logging is disabled
[--] Physical Memory : 49.1G
[--] Max MySQL memory : 4.8G
[--] Other process memory: 494.7M
[--] Total buffers: 320.0M global + 7.7M per thread (600 max threads)
[--] P_S Max memory usage: 72B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 3.3G (6.75% of installed RAM)
[OK] Maximum possible memory usage: 4.8G (9.80% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/77K)
[OK] Highest usage of available connections: 66% (400/600)
[OK] Aborted connections: 0.01% (1/9317)
[!!] Query cache may be disabled by default due to mutex contention.
[!!] Query cache efficiency: 0.0% (0 cached / 46K selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 26 sorts)
[OK] No joins without indexes
[OK] Temporary tables created on disk: 0% (63 on disk / 9K total)
[OK] Thread cache hit rate: 80% (1K created / 9K connections)
[OK] Table cache hit rate: 92% (1K open / 1K opened)
[OK] Open file limit used: 21% (225/1K)
[!!] Table locks acquired immediately: 76%
-------- Performance schema ------------------------------------------------------------------------
[--] Memory used by P_S: 72B
[--] Sys schema is installed.
-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is disabled.
-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 18.3% (24M used / 134M cache)
[OK] Key buffer size / total MyISAM indexes: 128.0M/4.5M
[OK] Read Key buffer hit rate: 99.9% (12K cached / 15 reads)
[!!] Write Key buffer hit rate: 38.7% (1K cached / 416 writes)
-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[OK] InnoDB buffer pool / data size: 128.0M/106.4M
[OK] Ratio InnoDB log file size / InnoDB Buffer pool size: 16.0M * 2/128.0M should be equal 25%
[OK] InnoDB buffer pool instances: 1
[--] Number of InnoDB Buffer Pool Chunk : 1 for 1 Buffer Pool Instance(s)
[OK] Innodb_buffer_pool_size aligned with Innodb_buffer_pool_chunk_size & Innodb_buffer_pool_instances
[OK] InnoDB Read buffer efficiency: 100.00% (366193213 hits/ 366199541 total)
[OK] InnoDB Write log efficiency: 95.85% (219192 hits/ 228694 total)
[OK] InnoDB log waits: 0.00% (0 waits / 9502 writes)
-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is disabled.
-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.
-------- XtraDB Metrics ----------------------------------------------------------------------------
[--] XtraDB is disabled.
-------- RocksDB Metrics ---------------------------------------------------------------------------
[--] RocksDB is disabled.
-------- Spider Metrics ----------------------------------------------------------------------------
[--] Spider is disabled.
-------- Connect Metrics ---------------------------------------------------------------------------
[--] Connect is disabled.
-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is disabled.
-------- Replication Metrics -----------------------------------------------------------------------
[--] Galera Synchronous replication: NO
[--] No replication slave(s) for this server.
[--] Binlog format: ROW
[--] XA support enabled: ON
Use of uninitialized value $_[0] in concatenation (.) or string at
mysqltuner.pl line 233 (#1)
(W uninitialized) An undefined value was used as if it were already
defined. It was interpreted as a "" or a 0, but maybe it was a mistake.
To suppress this warning assign a defined value to your variables.
To help you figure out what was undefined, perl will try to tell you
the name of the variable (if any) that was undefined. In some cases
it cannot do this, so it also tells you what operation you used the
undefined value in. Note, however, that perl optimizes your program
and the operation displayed in the warning may not necessarily appear
literally in your program. For example, "that $foo" is usually
optimized into "that " . $foo, and the warning will refer to the
concatenation (.) operator, even though there is no . in
your program.
[--]
[--]
[--] This is a standalone server
-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
Control warning line(s) into /var/log/mysql/error.log file
Control error line(s) into /var/log/mysql/error.log file
Restrict Host for user@% to user@SpecificDNSorIp
MySQL started within last 24 hours - recommendations may be inaccurate
Optimize queries and/or use InnoDB to reduce lock wait
Variables to adjust:
query_cache_size (=0)
query_cache_type (=0)
query_cache_limit (> 128M, or use smaller result sets)
请帮我
1 回答
建议考虑你的my.cnf-ini [mysqld]部分
当您想要查找不使用索引的查询时,
然后,一小时后,回到正常的慢查询日志:
如果您可以发布ulimit -a的文本结果,我们就会知道您正在使用的操作系统限制 .
我们仍然想知道你的ulimit值设置为什么 .