XE :: Minimal Lightweight Configuration On Linux?

I have installed Oracle XE 10g on Linux (32-bit) with modest resources (i.e. 512MB RAM).Everything seems to run well.i use this installation to run very basic integration tests only.
So, it won't be used in multi-user or production environment.

I imagine, it should be possible to tweak the XE configuration and decrease its footprint even more,to instruct automatic resources management to not to be ready for 20 simultaneous connections (as I understand that's the default), but 5, and such.

1) Is it possible to decrease memory allocation? I have learned a bit about SGA and PGA settings, but I;m not sure what's a reasonable limit here.

2) Is it possible to disable number of connections , as explained above.

3) Is it possible to completely disable unused components, like some application servers, Java applications, and such. I have already tried to set the HTTP port to 0, but there may be is more aggressive policy possible.

4) Any chance to cut down the nubmer of spawned processes?

Currenly, I'm getting this:

# ps aux | grep oracle
oracle   14065  0.0  0.5  21652  5864 ?        Ss   22:35   0:00 /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/tnslsnr LISTENER -inherit
oracle   14161  0.0  0.9 370360 10204 ?        Ss   22:36   0:00 xe_pmon_XE
oracle   14163  0.0  0.8 369744  8828 ?        Ss   22:36   0:00 xe_psp0_XE
oracle   14165  0.0  1.7 369744 18132 ?        Ss   22:36   0:00 xe_mman_XE
oracle   14167  0.0  1.1 371812 12048 ?        Ss   22:36   0:00 xe_dbw0_XE

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