postgres error

I got the folloing message in th system log:


2008:11:03-08:03:31 (none) postgres[18600]: [3-1] LOG:  unexpected EOF on client connection
2008:11:03-08:03:31 (none) postgres[18604]: [3-1] LOG:  unexpected EOF on client connection
2008:11:03-08:04:14 (none) postgres[18374]: [3-1] ERROR:  index "primary_l" contains corrupted page at block 3465
2008:11:03-08:04:14 (none) postgres[18374]: [3-2] HINT:  Please REINDEX it.
2008:11:03-08:04:14 (none) postgres[18374]: [3-3] CONTEXT:  automatic vacuum of table "smtp.public.l"


the cpu usage is 100 % !!
How can I reindes the database??

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