mongostat Fields 注释

------------红色字体的四个field个人认为是重要参数，过高即可重启db----------------

Fields

mongostat returns values that reflect the operations over a 1 second period. When mongostat <sleeptime> has a value greater than 1, mongostat averages the statistics to reflect average operations per second.

mongostat outputs the following fields:

inserts

每秒钟插入到数据库中的对象数目。如果后面跟有一个星号（即 *），则该数据表示一个复制操作。

query

每秒钟的查询操作数目。

update

每秒钟的更新操作数目。

delete

每秒钟的删除操作数目。

getmore

每秒钟的获取更多（如光标批次）操作数目。

command

The number of commands per second. On slave and secondary systems, mongostat presents two values separated by a pipe character (e.g. |), in the form of local|replicated commands.

flushes

每秒钟的 fsync 操作数目。

mapped

The total amount of data mapped in megabytes. This is the total data size at the time of the last mongostat call.

size

The amount of (virtual) memory in megabytes used by the process at the time of the last mongostat call.

res

The amount of (resident) memory in megabytes used by the process at the time of the last mongostat call.

faults

2.1 版已更改。

每秒钟的页面错误数目。

在 2.1 版之前，该值仅为在 Linux 主机上运行的 MongoDB 实例提供。

locked

全局写入锁定的时间百分比。

Changed in version 2.2: The locked db field replaces the locked % field to more appropriate data regarding the database specific locks in version 2.2.

locked db

2.2 版新特性。

The percent of time in the per-database context-specific lock. mongostat will report the database that has spent the most time since the last mongostat call with a write lock.

This value represents the amount of time that the listed database spent in a locked state combined with the time that the mongod spent in the global lock. Because of this, and the sampling method, you may see some values greater than 100%.

idx miss

访问加载 btree 节点时需要页面故障的尝试的索引百分比。这是一个采样值。

qr

客户端等待从 MongoDB 实例读取数据的队列长度。

qw

客户端等待向 MongoDB 实例写入数据的队列长度。

ar

执行读取操作的活动客户端的数目。

aw

执行写入操作的活动客户端的数目。

netIn

The amount of network traffic, in bytes, received by the MongoDB instance.

This includes traffic from mongostat itself.

netOut

The amount of network traffic, in bytes, sent by the MongoDB instance.

This includes traffic from mongostat itself.

conn

打开连接的总数。

set

副本集的名称（如适用）。

repl

节点的复制状态。

值	复制类型
M	主版本
SEC	次
REC	恢复
UNK	未知
SLV	从属