MySQL Enterprise Monitor Reference [翻译]

来源：

http://dev.mysql.com/doc/mysql-monitor/2.0/en/mem_graphref.html#mem_graphref_database_activity

MySQL Enterprise Monitor 2.0 :: F MySQL Enterprise Monitor Reference :: F.11 Advisor/Graph Reference :: F.11.2 Graph Definition Reference

转载请注明原文链接http://www.cnblogs.com/lenagt/archive/2012/06/06/2538182.html 谢谢。

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Graph Definition Reference

The following items describe individual graphs.

Connections   //连接数

Displays the number of client connections by displaying the number of connected threads, active threads, and cached threads.

显示客户端连接数，连接的线程数、活动线程数、缓存线程数。

Name	Connections
Range Label	total/min
Series  //级别	Expression  //表达式
Aborted	aborted
Active	running
Current	connected
Variables  //变量	Data Item  //对应数据项
connected	mysql:status:Threads_connected
running	mysql:status:Threads_running
aborted	mysql:status:Aborted_connects

 

CPU Utilization    //CPU利用率

Displays the CPU usage statistics over time for the machine hosting the MySQL server. The graph shows the aggregate system, user, wait and idle times for your CPU(s). You can use this information to help determine your CPU utilization and whether you are getting the most efficient use of your CPU power.

显示MySQL服务所在机器的CPU使用率。这个图展示了CPU的系统占用、用户、等待、空闲状态。通过参考这些信息可以使你的CPU更高效。

Name	CPU Utilization
Range Label	%
Series	Expression
Kernel	sys/(sys+user+wait+idle)*100
Total	(sys+user+wait)/(sys+user+wait+idle)*100
User	user/(sys+user+wait+idle)*100
Wait I/O	wait/(sys+user+wait+idle)*100
Variables	Data Item
sys	os:cpu:cpu_sys
user	os:cpu:cpu_user
wait	os:cpu:cpu_wait
idle	os:cpu:cpu_idle

Database Activity    //数据库活动

Displays the database activity, by showing the individual counts over time of different DML statements per minute. For example, you can monitor the number of SELECT statements executed per minute over time and gain an understanding of your server throughput. This information can be used to monitor the activity level, and provide a useful quick reference for your server operation.

显示数据库的活动，通过展示每分钟不同DML的个别计数。比如，你可以监控每分钟执行SELECT语句的数量，并且了解服务器的吞吐量。这个信息可以用来监控活动级别，并对服务器的运行提供有效快速的参考。

Name	Database Activity
Range Label	avg statements/sec
Series	Expression
Call	((call_proc)/60)
Delete	((deletes+delete_multi)/60)
Insert	((inserts+insert_selects)/60)
Replace	((replaces+replace_selects)/60)
Select	(selects/60)
Update	((updates+update_multi)/60)
Variables	Data Item
selects	mysql:status:Com_select
inserts	mysql:status:Com_insert
insert_selects	mysql:status:Com_insert_select
updates	mysql:status:Com_update
update_multi	mysql:status:Com_update_multi
replaces	mysql:status:Com_replace
replace_selects	mysql:status:Com_replace_select
deletes	mysql:status:Com_delete
delete_multi	mysql:status:Com_delete_multi
call_proc	mysql:status:Com_call_procedure

 

 

Hit Ratios    //命中率

Shows the cache hit ratios (as a percentage) for the query cache, MyISAM and InnoDB tables, and the connection and thread cache information. The information provided by the hit ratios can provide indicators of whether your cache is working effectively, or is of a size suitable for the data that you are storing and retrieving. Low hit ratios indicate that your cache are inefficient and may need to be investigated.

显示查询缓存、MyISAM和InnoDB表、连接和线程缓存信息的缓存命中率（百分比）。命中率提供的信息可以指出缓存是否有效的工作，或是否适合存储和检索的大小。低命中率表示你的缓存效率低下可能需要作出调整。

Name	Hit Ratios
Range Label	%
Series	Expression
InnoDB Buffer	100-((iReads / iReadRequests)*100)
Key Cache	(100-((keyReads / keyReadRequests)*100)) * (keyReadRequests >= keyReads)
Query Cache	(qHits/(qHits+qInserts))*100
Thread Cache	100-((tcreated / connections)*100)
Variables	Data Item
qHits	mysql:status:Qcache_hits
qInserts	mysql:status:Qcache_inserts
keyReads	mysql:status:Key_reads
keyReadRequests	mysql:status:Key_read_requests
iReads	mysql:status:Innodb_buffer_pool_reads
iReadRequests	mysql:status:Innodb_buffer_pool_read_requests
tcreated	mysql:status:Threads_created
connections	mysql:status:Connections

 

InnoDB Buffer Pool   //InnoDB缓冲池

Displays the size and page usage of the InnoDB buffer pool, providing information on the cache usage and performance. The graph shows the buffer pool size, active pages, and the number of modified pages.

显示InnoDB缓冲池大小和页面使用情况，为缓存的使用情况和性能提供信息。这个图展示了缓冲池大小、活动页面和被修改页面数量。

Name	InnoDB Buffer Pool
Range Label	MB
Series	Expression
Modified	(modified*16384)/(1024*1024)
Total Size	(size*16384)/(1024*1024)
Used	(used*16384)/(1024*1024)
Variables	Data Item
size	mysql:innodbstatus:innodb_bp_size
used	mysql:innodbstatus:innodb_bp_db_pages
modified	mysql:innodbstatus:innodb_bp_modified_pages

 

InnoDB OS File Access     //InnoDB文件系统访问

Displays the InnoDB I/O counts showing the number of fsync, read, and write operations used to support InnoDB tables.

显示InnoDB的I/O操作统计。包括InnoDB表的fsync、读、写操作。

Name	InnoDB OS File Access
Range Label	avg operations/sec
Series	Expression
File fsync()	(fsync/60)
File Reads	(read/60)
File Writes	(write/60)
Variables	Data Item
read	mysql:innodbstatus:innodb_io_os_file_reads
write	mysql:innodbstatus:innodb_io_os_file_writes
fsync	mysql:innodbstatus:innodb_io_os_file_fsyncs

 

InnoDB Row Details   //InnoDB行详细信息

Shows the row counts per minute for individual SQL operations (READ, INSERT, UPDATE and DELETE).

按类别显示每分钟SQL操作的总数。

Name	InnoDB Row Details
Range Label	avg rows/sec
Series	Expression
Rows Deleted	(deleted/60)
Rows Inserted	(inserted/60)
Rows Read	(read/60)
Rows Updated	(udpated/60)
Variables	Data Item
read	mysql:innodbstatus:innodb_rows_read
inserted	mysql:innodbstatus:innodb_rows_inserted
updated	mysql:innodbstatus:innodb_rows_updated
deleted	mysql:innodbstatus:innodb_rows_deleted

 

InnoDB Semaphores    //InnoDB 信号状态

Displays the InnoDB semaphore status. The graph indicates the amount of time that different InnoDB threads have spent waiting due to the locks used to prevent the same structures being updated at the same time. A large number of threads waiting for the semaphores may be a result of disk I/O or connection problems inside InnoDB. You may want to modify your InnoDB thread concurrency.

显示InnoDB信号状态。该图显示不同的InnoDB线程用于防止同时更新相同的结构而花在等待锁的时间。大量的线程在等待信号可能是由磁盘I/O或InnoDB内部连接问题导致。你可能需要调整InnoDB线程并发量。

Name	InnoDB Semaphores
Range Label	avg waits/sec
Series	Expression
OS Waits	(oswaits/60)
Spin Rounds	(srounds/60)
Spin Waits	(swaits/60)
Variables	Data Item
swaits	mysql:innodbstatus:innodb_sem_mutex_spin_waits
srounds	mysql:innodbstatus:innodb_sem_mutex_rounds
oswaits	mysql:innodbstatus:innodb_sem_mutex_os_waits

 

KBytes In/Out   //客户端I/O

Displays the total Kilobytes per minute of bytes transferred to/from the server by client applications. Spikes in this output may indicate an unusual application operation or connection.

显示每分钟服务器与客户端应用程序间传输的字节总数（I/O）。这个输出的峰值可能表明一个异常的应用程序或连接。

Name	KBytes In/Out
Range Label	avg kbytes/sec
Series	Expression
Received	((bytesIn/1024)/60)
Sent	((bytesOut/1024)/60)
Total	(((bytesIn+bytesOut)/1024)/60)
Variables	Data Item
bytesIn	mysql:status:Bytes_received
bytesOut	mysql:status:Bytes_sent

 

Load Average    //平均负载

The load average of the server hosting the MySQL server. The load average shows the number of processes using or waiting for CPU time in the last 1, 5 and 15 minutes. Load averages showing a load higher than the number of CPU cores may indicate an overloaded server.

MySQL服务器的平均负载。负载显示线程在1、5、15分钟内使用或等待CPU 时钟。图形显示高于CPU核心数量的负载可能表示一个重负载的服务器。

Name	Load Average
Range Label	Load Average
Series	Expression
1	zero
15	two
5	one
Variables	Data Item
one	os:loadavg:1
two	os:loadavg:2
zero	os:loadavg:0

 

Memory Usage – Agent   //内存使用 – 代理

Displays the current amount of memory used by the agent, and by the Lua component of the agent.

显示代理使用的当前内存容量，从代理的Lua组件。

Name	Memory Usage - Agent
Range Label	MB
Series	Expression
Agent	agent_mem_size / 1024 / 1024
Lua	lua_mem_size / 1024 / 1024
Variables	Data Item
lua_mem_size	agent:lua:mem_size
agent_mem_size	agent:proc:mem_resident

 

Memory Usage - OS Resident    //内存使用 – 系统驻留

Displays the RAM usage on the server for the monitored MySQL instance. You should compare the total and used RAM values to ensure that you are not exceeding your available RAM, which will lead to swapping and performance issues.

显示被监控的MySQL服务器内存使用情况。你应该比较总量和使用的内存来确保不超过可用的内存，这将导致交换和性能问题。

Name	Memory Usage - OS Resident
Range Label	MB
Series	Expression
Total	ram_total/(1024*1024)
Used	(ram_total-ram_unused)/(1024*1024)
Variables	Data Item
ram_total	os:mem:ram_total
ram_unused	os:mem:ram_unused

 

Memory Usage - OS Virtual   //内存使用 – 系统虚拟

Displays the use of swap space on the server for the monitored MySQL instance. High swap usage may indicate that your server needs more RAM or that your MySQL configuration needs to be modified, as high levels of swap will have a negative impact on performance.

显示服务器上使用的交换空间大小。高的交换空间使用率可能表明服务器需要更多的内存或需要更改MySQL配置，高级别的交换空间使用度将对性能产生负面影响。

 

Name	Memory Usage - OS Virtual
Range Label	MB
Series	Expression
Total	swap_total/(1024*1024)
Used	(swap_total-swap_unused)/(1024*1024)
Variables	Data Item
swap_total	os:mem:swap_total
swap_unused	os:mem:swap_unused

 

Opened Tables      //打开表

The number of tables in the open state per minute.

开启状态下每分钟打开的表数。

Name	Opened Tables
Range Label	total/min
Series	Expression
Opened Tables	openedTables
Variables	Data Item
openedTables	mysql:status:Opened_tables

 

Query Cache Blocks   //查询缓存块

The block usage of the query cache. Low usage may indicate that you are not getting the best performance out of your query cache. High numbers may indicate that you need to increase your query cache size to allow more queries to be cached.

使用的查询缓存块数。低使用率可能表明你没有使查询缓存获得最佳性能。高使用率表明你需要更多的查询缓存空间来允许更多的查询被缓存。

Name	Query Cache Blocks
Range Label	num blocks
Series	Expression
Free	free_blocks
Size	size_blocks
Variables	Data Item
size_blocks	mysql:status:Qcache_total_blocks
free_blocks	mysql:status:Qcache_free_blocks

 

Query Cache Efficiency    //查询缓存效率

Displays the hits, inserts and queries not cacheable in the query cache. Low cache hits may indicate that your queries are being expired from the cache before they can be used, which may mean they are unsuitable for storing in the query cache.

显示查询缓存的命中、加入的数量和非查询缓存数。低缓存命中率可能表明查询在被使用之前正在从缓存过期，这可能意味着他们不适合被缓存。

 

Name	Query Cache Efficiency
Range Label	avg cache ops/sec
Series	Expression
Hits	(hits/60)
Inserts	(inserts/60)
Not Cached	(not_cached/60)
Variables	Data Item
hits	mysql:status:Qcache_hits
inserts	mysql:status:Qcache_inserts
not_cached	mysql:status:Qcache_not_cached

 

Query Cache Lowmem Prunes   //由于内存较少从缓存删除的查询数量

Displays the number of queries removed from the cache because the size of the query cache was not large enough to store the queries that can be cached. Try increasing your query cache size.

显示从缓存删除的查询，因为查询缓存大小不足导致。尝试增加查询缓存的大小。

Name	Query Cache Lowmem Prunes
Range Label	avg cache ops/sec
Series	Expression
Lowmem Prunes	(deletes/60)
Variables	Data Item
deletes	mysql:status:Qcache_lowmem_prunes

 

Query Cache Memory   //查询缓存

Displays the free space and total size of the query cache.

显示查询缓存的自由空间和总量。

Name	Query Cache Memory
Range Label	MB
Series	Expression
Free MB	free/(1024*1024)
Size MB	size/(1024*1024)
Variables	Data Item
size	mysql:variables:query_cache_size
free	mysql:status:Qcache_free_memory

 

Query Cache Queries    //登记到缓存内的查询的数量

Shows the number of queries stored in the query cache. In normal operation this should be a relatively constant figure. A large number of switches between high and low numbers may indicate that differently sized queries are being inserted into the query cache, and then later removed as a high number of smaller queries are added to the cache. Try increasing the size of your query cache.

显示登记到缓存内的查询的数量。正常运行的时候这应该是一个相对恒定的数字。大量的数值波动可能表明不同大小的查询被查询缓存插入后删除，作为大量的小查询添加进缓存。尝试增加您的查询缓存大小。

Name	Query Cache Queries
Range Label	num queries
Series	Expression
Queries in Cache	queries
Variables	Data Item
queries	mysql:status:Qcache_queries_in_cache

 

Replication Delay    //复制延迟

Displays the number of seconds behind the master for a given slave in a replication scenario. An increasing value means that your slave is unable to keep up with your master.

显示复制场景中Slave与Master之间相差的秒数。增加值说明Slave无法跟上Master。

Name	Replication Delay
Range Label	total seconds
Series	Expression
Seconds Behind Master	sbehind
Variables	Data Item
sbehind	mysql:slavestatus:Seconds_Behind_Master

 

Row Accesses    //行访问统计汇总

Displays the aggregated row access statistics per minute. Information is shown both in terms of the full table scans (which are expensive to perform), and index based accesses.

显示每分钟行访问统计汇总。资料展示无论是在全表扫描(执行代价很高)还是基于索引的访问。

Name	Row Accesses
Range Label	avg rows/sec
Series	Expression
Average Rows Per Query	((first+key+next+prev+hread_rnd+hread_rnd_next+sort_rows) / questions)
Rows Read via Full Scan	((hread_rnd+hread_rnd_next)/60)
Rows Read via Indexes	((first+key+next+prev)/60)
Variables	Data Item
first	mysql:status:Handler_read_first
key	mysql:status:Handler_read_key
next	mysql:status:Handler_read_next
prev	mysql:status:Handler_read_prev
hread_rnd	mysql:status:Handler_read_rnd
hread_rnd_next	mysql:status:Handler_read_rnd_next
sort_rows	mysql:status:Sort_rows
questions	mysql:status:Questions

 

Row Writes    //行写统计

Shows the number of delete, write (INSERT), and update operations on rows per minute on all tables regardless of storage engine.

显示所有表上删除、插入、更新操作的行数，不考虑存储引擎。

Name	Row Writes
Range Label	avg rows/sec
Series	Expression
Rows Deleted	(delete/60)
Rows Inserted	(write/60)
Rows Updated	(update/60)
Variables	Data Item
delete	mysql:status:Handler_delete
update	mysql:status:Handler_update
write	mysql:status:Handler_write

 

Sort Activity   //排序活动

Shows the number of different sort operations performed on queries.

显示不同排序上查询执行的操作数。

Name	Sort Activity
Range Label	total/min
Series	Expression
Merge Passes	Sort_merge_passes
Range	Sort_range
Scan	Sort_scan
Variables	Data Item
Sort_merge_passes	mysql:status:Sort_merge_passes
Sort_range	mysql:status:Sort_range
Sort_scan	mysql:status:Sort_scan

 

Table Locks   //表锁

Shows the average number of table locks per second.

显示每秒表锁的平均数。

Name	Table Locks
Range Label	avg locks/sec
Series	Expression
Immediate	(locks_immediate/60)
Waited	(locks_waited/60)
Variables	Data Item
locks_waited	mysql:status:Table_locks_waited
locks_immediate	mysql:status:Table_locks_immediate

 

Temporary Tables   //临时表

Displays the number of memory temporary tables and disk temporary tables. Disk temporary tables are slower to create, populate, and read back. You may want to increase your memory temporary table size or check your queries to determine whether the use of temporary tables can be minimized.

显示内存中和硬盘中临时表的数量。磁盘上临时表的创建、填充和回读速度较慢。你可以增加内存临时表空间的大小或检查您的查询，来确定是否可以尽量减少使用临时表。

Name	Temporary Tables
Range Label	total/min
Series	Expression
Disk Temp Tables	diskTempTables
Memory Temp Tables	memoryTempTables
Variables	Data Item
memoryTempTables	mysql:status:Created_tmp_tables
diskTempTables	mysql:status:Created_tmp_disk_tables

 

Thread Cache    //线程缓存

Displays the thread cache information, comparing new thread creations against all database connections.

显示线程缓存信息，对所有数据库连接中比较新线程的创建。

Name	Thread Cache
Range Label	total/min
Series	Expression
New Connections	connections
Threads Created	tcreated
Variables	Data Item
tcreated	mysql:status:Threads_created
connections	mysql:status:Connections