oversized prepared statements cache

[mooreniemi]

While running in production, we're seeing our memory flood with T4CPreparedStatements. They end up taking 90% of heap when we look at the dump. I was hoping you could help me rule out any issues in OE.

I saw in other DB adapters some rescue protection not present in OE, ie:

begin
  @connection.prepare nextkey, sql
 rescue => e
   raise translate_exception_class(e, sql)
end

I also saw issues even with even the above protections when Rack::Timeout is used (as it is for us in our Rails stack): rails/rails#17607

Any ideas why I'd be getting overrun by T4Cs?

[stale]

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