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From "steve.hostettler" <steve.hostett...@gmail.com>
Subject Re: LoadCache Performance decreases with the size of the cache
Date Sat, 24 Dec 2016 07:58:37 GMT
Hi Val,

first of all, let me thank you for this great product and incredible mailing

Anonymizing our code will take a bit longer but I can give the following

load time 10M records without indexes 10m2s
load time 10M records with a simple row id type index : 12m
load time 10M records with a simple row id type index + a composed index (3
columns : Long, Long, String) :  40 minutes

The VM's heap is 56Gb, At the end of the processing, it consumes .. GB with
a peak of 32Gb. Maximum GC pause is 2s with a pause every 2 minutes. So GC
does not sound to be an issue.

As for the performance I took 3 snapshots of 5 minutes each.
After 2 min : 

After 15 min

After 35min

I was also a bit surprised of the use of Lucene internally to H2.

Hope you can make sense of all of this.

Thanks and happy holidays

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