Calendar process consumes over 2GB memory

When I boot Mac OSX 10.7.2, a process called Calendar runs at nearly 100% for perhaps a minute or so.  When it finally quiets down, Activity Monitor shows that it has consumed 2.3 GB of memory (over half what's available).  I've taken to killing this process to free the memory, with no apparent ill effects.  But I'd like to know what's going on and how to fix it.  Anybody seen this?
Thanks,
Chap

When I boot Mac OSX 10.7.2, a process called Calendar runs at nearly 100% for perhaps a minute or so.  When it finally quiets down, Activity Monitor shows that it has consumed 2.3 GB of memory (over half what's available).  I've taken to killing this process to free the memory, with no apparent ill effects.  But I'd like to know what's going on and how to fix it.  Anybody seen this?
Thanks,
Chap

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