Lots of heapdump, javacore and snap files in server Directory

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Hi,

Lots of heapdump, javacore and snap files are getting generated in server directory. The exact path of the files are (/usr/sap/<SID>/JC01/j2ee/cluster/server0).

The size of these file are quite big and because of this, /usr/sap/<SID> fills very rapidally. We used to delete thses files with regular frequency to keep our system running. These files looks like ...

-rw-r r 1 ep1adm sapsys 2509684 Jun 03 17:22 Snap0001.20090603.172213.2429064.trc

-rw-r r 1 ep1adm sapsys 5244550 Jun 03 17:23 javacore.20090603.172213.2429064.txt

-rw-r r 1 ep1adm sapsys 2321268 Jun 04 14:46 Snap0001.20090604.144622.2924610.trc

-rw-r r 1 ep1adm sapsys 2321268 Jun 04 14:46 Snap0002.20090604.144627.2924610.trc

-rw-r r 1 ep1adm sapsys 2321268 Jun 04 14:46 Snap0003.20090604.144627.2924610.trc

-rw-r r 1 ep1adm sapsys 20850651 Jun 04 15:34 javacore.20090604.150942.2924614.txt

-rw-r r 1 ep1adm sapsys 758915341 Jun 04 18:56 heapdump.20090604.185528.2277626.phd

Now my queries are

1) What is cause behind the generation of these files?

2) What are parameters which governs the size of these files?

3) Suggestions to reduce the generation as well as size of these files.

Try to search a lot and could not get enough material and replies which satisfies me.

So looking for your help here.

With Regards,

Saurabh