to be honest, I did not really understand the second email, but thank you anyway, I will try out your recommendation soon!Oops, forgot one aspect here: the caches and buffers aren't created of the correct size from the first time (because it is unknown on beforehand). Rather it starts small, lets say at 10k, and when that buffer is full, a new one of 20k is created and the first 10k is copied into it, then when the 20k is full one of 40k is created, and so on... after a while it will reach e.g. 40MB and create one of 80MB, copying the first 40MB into it, and thus needing 120MB of memory temporarely to holds those two buffers...
Alex
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