Re: Optimizing Core Data for large time series
Re: Optimizing Core Data for large time series
- Subject: Re: Optimizing Core Data for large time series
- From: Peter Passaro <email@hidden>
- Date: Thu, 10 May 2007 15:12:05 +0100
Please ignore the previous message in this thread. It was my own
stupidity in not resetting my NSData objects - they were growing
exponentially on each save to store.
I wrote:
I wanted to report back after a little more experimentation. I have
found the optimum BLOB size for my application to be about 1Mb -
the import and data access speed is reasonable at this size. What
is concerning me now is that the storage overhead seems to be
pretty hefty for placing these BLOBs inside an SQL persistent
store. For each 1Mb BLOB placed in the store, I am adding roughly
20Mb to the SQL file. Can anybody give me some direction as to what
all that overhead is? Is this typical for NSData objects stored as
BLOBs in SQL stores?
Peter Passaro
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