Oracle XE 11gR2 - smallest (I mean really small) memory_target allowed?

I'm installing Oracle XE 11gR2 on a RHEL (OK, it's really CentOS) 5.6 VPS that has 512MB of memory. That is the minimum XE will install on.
It's just for my personal use, testing, etc.
I've added a swapfile that gives me more memory - a total of 1GB. Fortunately, the CPU and disk are very fast.
With XE up and running, I still show a good amount of memory (Buffers in free -m shows 361M free, and only 54M of swap is in use).
My question...how low can I set the XE memory_target? By default it's set to 196M. I'm wondering if I could crank that down a bit...perhaps 96M? Is there a "don't go below" minimum?
As I understand it, I can set MEMORY_TARGET and MEMORY_MAX_TARGET the same...setting MEMORY_MAX_TARGET higher would just give me the ability to increase MEMORY_TARGET without having to bounce in the instance. In my case (single user, lab instance, etc.) I don't think that matters.

Well, I think I just answered my own question :-)
SQL> alter system set memory_target = 96m scope = spfile;
System altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORA-00838: Specified value of MEMORY_TARGET is too small, needs to be at least 172M

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COMPONENT                         CURRENT_SIZE   MIN_SIZE   MAX_SIZE USER_SPECIFIED_SIZE OPER_COUNT LAST_OPER_TYP LAST_OPER LAST_OPER GRANULE_SIZE
shared pool                          201326592 201326592 201326592                   0          0 STATIC                                 4194304
large pool                            20971520   12582912   20971520            12582912          2 GROW          IMMEDIATE 04-JUN-12      4194304
java pool                                    0          0          0                   0          0 STATIC                                 4194304
streams pool                                 0          0          0                   0          0 STATIC                                 4194304
SGA Target                           264241152 255852544 264241152                   0          2 GROW          IMMEDIATE 04-JUN-12      4194304
DEFAULT buffer cache                         0          0          0                   0          0 STATIC                                 4194304
KEEP buffer cache                            0          0          0                   0          0 STATIC                                 4194304
RECYCLE buffer cache                         0          0          0                   0          0 STATIC                                 4194304
DEFAULT 2K buffer cache                      0          0          0                   0          0 STATIC                                 4194304
DEFAULT 4K buffer cache                      0          0          0                   0          0 STATIC                                 4194304
DEFAULT 8K buffer cache                      0          0          0                   0          0 STATIC                                 4194304
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DEFAULT 16K buffer cache                     0          0          0                   0          0 STATIC                                 4194304
DEFAULT 32K buffer cache                     0          0          0                   0          0 STATIC                                 4194304
Shared IO Pool                               0          0          0                   0          0 STATIC                                 4194304
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ASM Buffer Cache                      25165824   25165824   25165824                   0          0 STATIC                                 4194304
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Dude wrote:
The intention of Oracle UEK is quite obviously Oracle specific, so I think it is legitimate to ask why not to include the Oracle specific kernel configuration file. The UEK is a drop-in replacement for the existing kernel. Why would we include the oracle-validated configuration options into the kernel package when we already have a perfectly good oracle-validated RPM that can be used with both kernels? Also, the UEK may be Oracle specific, but it's not database specific. Keep in mind that Oracle has thousands and thousands of products. :) I run the UEK on lots and lots of servers, many of which don't run database and many of which have completely different /etc/sysctl.conf configurations.
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