High page in/out

(Sorry if the formatting is off.)

RedHat 7.2 with 2.4.18-18.7.xbigmem using RedHat's software RAID package.
 
I've been seeing quite a bit of page in/page out going on, and have been looking around.
 
We have a monitoring system that believes anything over 10 for pages/second could be a problem, and 20 is really bad.

I've gathered this from one of my systems, where: Pgs_in=pages_in (average for day) Pgs_in_max=pags_in_maximum (maximum value for day) Pgs_out=pages_out (average for day) Pgs_out_max=pags_out_maximum (maximum value for day)

Some output from one of our Linux systems:
sample_date	pgs_in  pgs_in_max	pgs_out pgs_out_max
5/16/2003	0.07	5.68	53.32	159.54
5/17/2003	0.04	3.27	49.89	167.2
5/18/2003	0.09	5.74	50.57	159.61
5/19/2003	0.02	0.04	51.55	160.07
5/20/2003	25.86	657.06	57.06	166.05
5/21/2003	56.21	970.79	66.15	156.4
5/22/2003	10.48	1371.75	58.27	168.07
5/23/2003	0.33	39.9	56.77	148.58
5/24/2003	0.03	0.26	56.2	162.94
5/25/2003	0.02	0.49	56.45	166.74
5/26/2003	0.05	1.13	65.62	173.82
5/27/2003	36.8	754.51	64	203.06

Hence that difficult question of what is the norm?  I'm trying to figure out if I have a problem or this is 'normal' for the system: a dual-CPU 1.4GHz PIII with 4GB of RAM.  The OS is on a local Hardware RAID card, but other data/apps are on a SAN attached software RAID0 device.

# more raidtab
raiddev /dev/md0
        raid-level              0
        nr-raid-disks           2
        persistent-superblock   1
        chunk-size              32
        device                  /dev/sdc1
        raid-disk               0
        device                  /dev/sdd1
        raid-disk               1
 
# free
            total       used       free     shared    buffers     cached
Mem:       3874464    3843256      31208          0   381844    3084184
-/+ buffers/cache:     377228    3497236
Swap:      2048248          0    2048248
 
# sar -r
Linux 2.4.18-18.7.xbigmem 05/29/2003
 
12:00:00 AM kbmemfree kbmemused  %memused kbmemshrd kbbuffers kbcached kbswpfree kbswpused  %swpused
12:10:00 AM     33956   3840508     99.12         0    381020 3085476   2048248         0      0.00
 
# swapon -s
Filename                        Type            Size    Used  
  Priority
/dev/sda6                       partition       2048248 0       -1
 
# more /etc/fstab
LABEL=/                 /                       ext3    
defaults        1 1
LABEL=/boot             /boot                   ext3    
defaults        1 2
none                    /dev/pts                devpts  
gid=5,mode=620  0 0
LABEL=/home             /home                   ext3    
defaults        1 2
none                    /proc                   proc    
defaults        0 0
none                    /dev/shm                tmpfs   
defaults        0 0
LABEL=/tmp              /tmp                    ext3    
defaults        1 2
LABEL=/usr              /usr                    ext3    
defaults        1 2
LABEL=/var              /var                    ext3    
defaults        1 2
/dev/md0 /hosting ext3 defaults,usrquota 0 0
/dev/sda6               swap                    swap    
defaults        0 0
/dev/cdrom              /mnt/cdrom              iso9660 
noauto,owner,kudzu,ro 0
0
/dev/fd0                /mnt/floppy             auto    
noauto,owner,kudzu 0 0

 
# sar -B
Linux 2.4.18-18.7.xbigmem 05/29/2003
 
12:00:00 AM  pgpgin/s pgpgout/s  activepg  inadtypg  inaclnpg inatarpg ...
Average:         0.02     55.34    561672    225090    115799 180512
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