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Memory usage during Db2 database backups

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I do not need a solution (just sharing information)

Netbackup 7.1.0.4, Linux 6x Master Server (VM), Windows 2008 R2 Standard Media Servers (Physical), Client -> Solaris 9, backing up Db2 in a local zone of a Solaris 10 two node cluster.  All Netbackup servers and the Solaris cluster + the local zone are v7.1.0.4

Our DAG has brought to my attention the below remarks.  I'm looking for an answer to give back to them.  They want to know if I can do anything about these peaks when backups run.

Memory use on prds31 has quieted down.  It does exceed 100% on occasion but nothing like before where paging would regularly go beyond 65% several times during the day, and memory use was regularly over 115%.  Now memory hovers at around 83%. When backups are run it goes up over 100%, as shown below. 

M is month, D is day, PID process number, C% is CPU % of server, M% is memory percent of server.

These are only peaks, well below the 115% previously recorded.  The reduction is due to work done by our team.

Number     Time       M D PID  C% M%

   302207,  01:15:30, 6, 2, 233, 28, 83,114707024,50179064,141

   302208,  01:16:30, 6, 2, 239, 26,103,122408264,63394384,143

   302209,  01:17:31, 6, 2, 236, 26,103,122287248,63383984,143

   302210,  01:18:31, 6, 2, 233, 26,103,122206536,63355552,141

   302211,  01:19:31, 6, 2, 233, 25,103,122206536,63356184,141

   302212,  01:20:31, 6, 2, 233, 26,104,122730824,63878120,141

   302213,  01:21:31, 6, 2, 234, 23, 85,110425840,51444496,140


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