[Cassandra Wiki] Update of "FAQ" by JoaquinCasares

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The "FAQ" page has been changed by JoaquinCasares.
http://wiki.apache.org/cassandra/FAQ?action=diff&rev1=103&rev2=104

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   * [[#bulkloading|How do I bulk load data into Cassandra?]]
   * [[#range_rp|Why aren't range slices/sequential scans giving me the expected results?]]
   * [[#unsubscribe|How do I unsubscribe from the email list?]]
+  * [[#cleaning_compacted_tables|I compacted, so why do I still have all my SSTables?]]
  
  <<Anchor(cant_listen_on_ip_any)>>
  
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  == How do I unsubscribe from the email list? ==
  Send an email to user-unsubscribe@cassandra.apache.org
  
+ <<Anchor(cleaning_compacted_tables)>>
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+ == I compacted, so why do I still have all my SSTables? ==
+ SSTables that are obsoleted by a compaction are deleted asynchronously when the JVM performs a GC. You can force a GC from jconsole if necessary, but Cassandra will force one itself if it detects that it is low on space. A compaction marker is also added to obsolete sstables so they can be deleted on startup if the server does not perform a GC before being restarted. Read more on this subject [[http://wiki.apache.org/cassandra/MemtableSSTable|here]].
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