Database backup size grown three times and get rest when we restart SQL Instance.

  • Facing an issue with database size, before restart SQL Backup was around 40GB, when we restarted SQL Server, size of full backup reset to 21gb, but after that every day it was growing and today it reached to 48GB.

    SQL Server Reset : 20-May-16

    DateFull backup size

    20-May 21gb

    21-May37GB

    23-May48GB

    Even Differential backup of every 3hrs increased from 14GB to 29GB

    We also configured 15min Transaction log backup for Log shipping.

    unable to find why the size of DB backup growing so much, We have Index maintenance plan running every day and it was running fine from last 5yrs.

  • Check the tablesizes on that database periodically and check is there any tables are growing abnormally.

  • You could restore previous backups on to a test box and run this proc to get all table sizes, then compare.

    SELECT

    t.NAME AS TableName,

    s.Name AS SchemaName,

    p.rows AS RowCounts,

    SUM(a.total_pages) * 8 AS TotalSpaceKB,

    SUM(a.used_pages) * 8 AS UsedSpaceKB,

    (SUM(a.total_pages) - SUM(a.used_pages)) * 8 AS UnusedSpaceKB

    FROM

    sys.tables t

    INNER JOIN

    sys.indexes i ON t.OBJECT_ID = i.object_id

    INNER JOIN

    sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id

    INNER JOIN

    sys.allocation_units a ON p.partition_id = a.container_id

    LEFT OUTER JOIN

    sys.schemas s ON t.schema_id = s.schema_id

    WHERE

    t.NAME NOT LIKE 'dt%'

    AND t.is_ms_shipped = 0

    AND i.OBJECT_ID > 255

    GROUP BY

    t.Name, s.Name, p.Rows

    ORDER BY

    t.Name

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