 Emails in Deferred cause close to 100% disk IO usage
An issue I noticed looking at the disk io usage graphs.
From the last few days I'm getting spikes close to 100%.
Looking at the queue, theres's 1500 deferred emails for 2 users due to being over quota.
If I delete those 1500 emails, my IO load drops back to normal ~20%
And two days later, the deferred queue has accumulated the same amount of emails due to those 2 users and IO disk usage is again close to 100%.
What causes the deferred queue to use so much disk activity, and how can I stop this for good?
Thank You | 
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