[ZODB-Dev] performance of chunked data over ZEO

[Tino Wildenhain]

Hi,

Am Sonntag, den 28.11.2004, 20:56 +0100 schrieb Andreas Jung:
> Inside an application that stored large amounts of data in the ZODB as 
> linked
> structure (very similar to the Pdata magic in OFS.Image) I discovered that
> the chunk size has a significant influcence on the performance.  Using a 
> chunk
> size of 16k (which is also the default in OFS.Image) I got the expected 
> transfer
> rate of about 2-3MB/second. Increasing the chunk size to 64K caused a 
> performance
> loss to about 100-150 KB/seconds. Any ideas why increasing the chunk size
> causes such a dramatic performance loss?

Isnt the typical pdata chunk size not 1<<16 which is 64K?

Regards
Tino