[Xen-users] The math doesn't add up (dom0-min-mem).

[skohrs <xen@xxxxxxxxxxxxxxxxxxxxx>]

How does this *not* work?  This server has 1G of RAM.  I set dom0-min-mem =
196, but obviously don't understand how this variable figures into the
equation.

xen01:~ # xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      744     4 r-----   157.2
www                                1      128     1 -b----    18.0
mail                                   2      128     1 -b----   145.7
xen01:~ # cd /etc/xen

xen01:/etc/xen # xm create db01
Using config file "db01".
Error: Error creating domain: I need 257 MiB, but dom0_min_mem is 196 and
shrinking to 196 MiB would leave only 554 MiB free.

xen01:/etc/xen # xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      493     4 r-----   173.0
www                                1      128     1 -b----    18.3
mail                                   2      128     1 -b----   160.3

xen01:/etc/xen # free
             total       used       free     shared    buffers     cached
Mem:        761856     245664     516192          0      65944      82024
-/+ buffers/cache:      97696     664160
Swap:      2104496          0    2104496

xen01:/etc/xen # xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      493     4 r-----   173.4
www                                1      128     1 -b----    18.3
mail                                   2      128     1 -b----   160.3

xen01:/etc/xen # grep 196 *
xend-config.sxp:(dom0-min-mem 196)

xen01:/etc/xen # xm create db01
Using config file "db01".
Error: Error creating domain: I need 257 MiB, but dom0_min_mem is 196 and
shrinking to 196 MiB would leave only 554 MiB free.

xen01:/etc/xen # xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      493     4 r-----   174.7
www                                1      128     1 -b----    18.3
mail                                   2      128     1 ------   160.8

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