MSDB has grown to 85 gb.

On one of the sql server, the msdb databases has grown to 85 gb.
We do have a plan to back up or clean it but still not sure how it happened.

We have total of 900 databases on this server.

Now I need help how I can reduce the size of msdb, will shrink work here?
yadavdepAsked:
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Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
If msdb database is growing, then it might be due to the backup history details..
Try deleting the backup history details by running the below script:(To be sure that it is the backup tables, try generating the Disk Usage by top tables for msdb database and you should see the backup related tables there)
use msdb
go
exec sp_delete_backuphistory '2017-05-01' 
go

Open in new window

1
Vitor MontalvãoMSSQL Senior EngineerCommented:
Not really only Backup histories but it can be also the job histories as they are also stored in msdb database.

900 databases is really a lot for a SQL Server instance. You should start planning in distributing them on more servers and instances.
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Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
Yes, chances of job histories is less compared to Backups as ideally there will be at least one full backup and multiple transaction log backups per day and for these 900 databases, I suspect it should be Backup histories..
Anyhow, we can confirm it once author posts the disk usage by top tables report for msdb database..
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