mongostat Fields 注释

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spmichael 2013-03-07 15:59:01 博主文章分类：mongodb

------------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%.