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Backup times vary wildly

Thread needs solution

I have several backups that run on schedules:

  1. A full incremental that runs every night at midnight and "resets" every thirty days
  2. A cloud backup of my critical documents that runs every night
  3. A full backup that runs every night
  4. A full backup that runs on the first of every month

Backups #1 and #3 sometimes run much longer than they should. It seems to be random.

Daily Incremental Backup

Date Backed Up (GB) Speed (Mbps) Elapsed time
2022-01-29 16.0 128.5 2:09
2022-01-30 16.1 123.7 2:05
2022-01-31 11.8 98.6 2:03
2022-02-01 15.7 107.5 4:59
2022-02-02 15.2 84.4 3:31
2022-02-03 13.3 111.4 1:60

You'd think that the backup speed would correlate with the elapsed time, but compare 2022-01-31 with 2022-02-01. I imagine that the time spent figuring out what to back up doesn't have anything to do with the speed, but what could be causing these huge swings? If everything runs the way it should, my backups are done by the time I've had my coffee and hit the keyboard; but if my backups are still running at noon, I've got a big problem.

I've tried looking for other activity that might interfere, but so far I haven't found anything.

All suggestions are welcome.

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Hello Jerry,

thank you for your posting! Difficult to find the root cause without the investigation of the log files, however here a couple of articles that might give some clues on the cause 

https://forum.acronis.com/forum/acronis-true-image-2020-forum/tale-very… 

46770: Acronis True Image: Troubleshooting Performance Issues 

In general, we'd recommend raising a support ticket for investigation of such issues.

Thanks.

Unfortunately, I can't reproduce the problem at will. Sometimes it happens, sometimes it doesn't. The disk drives aren't at fault. I do three backups overnight: an incremental to an external USB drive, a cloud backup of "important" files, and a full backup to another USB drive.

The cloud backup takes between five and ten minutes. The full backup takes three hours, give or take a few minutes. That's consistent.

It's the incremental backup that fluctuates wildly:

Date Backed up (GB) Speed (Mbps) Time
March 19 15.8 122.0 02:13  
March 20 11.7 103.2 02:17  
March 21 10.5 83.6 05:18  
March 22 21.1 159.0 02:34  

I understand there's a lot of work involved in figuring out what to include in an incremental backup, but the numbers for March 21 are out of whack.