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Backup Exec and high pages/sec.  Expected Behavior?

Posted on 2011-03-21
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Last Modified: 2013-12-01
I am running a few perfmon counters against a Backup Exec server.

Win2k3 Enterprise (Fully patched)
12GB Physical memory using the /PAE switch
Symantec Backup Exec 2010 R2 (SP1) using SQL Server

Here are the perfmon stats for an entire day:

CPU usage does utilization does not exceed 20%
Physical Disk transfers/sec does not exceed 15
Physical Memory Utilization does not exceed 10%
Page File Usage is at less than 1%
Pages/sec spikes constantly from 516 to 5,160 (While Backup Exec is running a backup)


My question is this.  Does Backup Exec read a high number of memory mapped files while executing backups?  Would this cause the Pages/sec counter to spike while not really causing any kind of performance degradation?  

Is this expected behavior?

Thanks much!
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Question by:rotech_IT
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hi, there

yes it would be expected high Spikes.
Backup Job are jobs that creates high intensive I/O this is why the spec on a Backup Server should never be the smallest server in your organization.

It is dependent on the RAID set you have configured if jobs goes to disk.
that's why i would never use a RAID 1 for backup to disk as it is slow on writing.

Cooledit
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by:rotech_IT
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Not a full explanation as to why the other perfmon counters are low but the pages/sec counter is high.  However, it does confirm my theory so it's good enough for me!
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