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Storage Analysis

Updated on 2025-01-02 GMT+08:00

Scenarios

RDS for SQL Server provides space monitoring and analysis by instance, database, and even table, helping you quickly learn about space information and identify space problems.

Constraints

To use the storage analysis function, contact customer service.

Overview

  1. Log in to the management console.
  2. Click in the upper left corner and select a region.
  3. Click in the upper left corner of the page and choose Databases > Relational Database Service.
  4. On the Instances page, click the target DB instance name.
  5. In the navigation pane, choose DBA Assistant > Real-Time Diagnosis.
  6. On the Storage Analysis tab page, view storage usage. If your storage is insufficient, scale it up.

    Figure 1 Overview
    Table 1 Parameter description

    Parameter

    Description

    Storage usage

    Used storage space of the DB instance.

    Total

    Total storage space of the DB instance.

    Available

    Available storage space of the DB instance.

    Avg. daily increase in last week(GB)

    Average daily increase in storage usage in the last seven days.

    Available days of storage

    Estimated number of days that the remaining storage space can be used.

Disk Space Distribution

You can view the distribution and changes of the storage space.

Figure 2 Disk space distribution
Table 2 Disk space distribution parameters

Parameter

Description

Data space

Total space occupied by data files.

Transaction logs

Total space occupied by transaction logs.

Run logs

Total space occupied by run logs.

Slow query log

Total space occupied by slow query logs.

Audit log

Total space occupied by audit logs.

Temporary space

Total space of the tempdb database.

System database

Total space of system database msdb.

Top 20 Databases

You can view details about the top 20 databases by physical file size, including file information.

Table 3 Database list parameters

Parameter

Description

Database

Database name.

Status

Database status.

Total(MB)

Total space of the database, in MB.

Used(MB)

Used space of the database, in MB.

Available(MB)

Available space of the database, in MB.

Used by Logs(MB)

Space used by transaction logs in the database, in MB.

Available to Logs(MB)

Space available to transaction logs in the database, in MB.

  • You can click View Chart in the database list to view database space changes in the last 7 days, last 30 days, or a custom time period.
  • You can click in front of a database to expand the list of files contained in the database.
    Table 4 File list parameters

    Parameter

    Description

    File Group

    Name of the file group where the file is located. The file group of log files is NULL.

    File Type

    Type of the file, which can be Data, Log, or Filestream.

    File Name

    Name of the file.

    Total(MB)

    Total space of the file, in MB.

    Used space(MB)

    Used space of the file, in MB.

    Available(MB)

    Available space of the file, in MB.

    Max. File Size(MB)

    Maximum file space, in MB. The value -1 indicates that the file space is not limited.

    Automatic File Growth

    Automatic growth of the file, in MB or percentage.

    In the file list, you can select one or more files and click Shrink Files to shrink the files. (This operation is not allowed for the master, msdb, model, and rdsadmin databases.)

Top 20 Tables

You can view details about the top 20 tables by physical file size. Tables whose names contain non-English character sets cannot be displayed.

Table 5 Table parameters

Parameter

Description

Table Name

Name of the table.

Reserved(MB)

Total space reserved for the table.

Data Space(MB)

Total space occupied by table data.

Index Space(MB)

Total space occupied by table indexes.

Available(MB)

Available space of the table.

Rows

Total number of rows in the table.

Indexes

Number of indexes created in the table.

Created

Time when the table is created. The format is affected by the character set of the instance.

You can click View Chart in the table list to view tablespace changes in the last 7 days, last 30 days, or a custom time period.

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