MPS issue job003857

TitleAMC now slower than 1.113
Assigned userDavid Lovemore
DescriptionDuring release testing, we found that gcbench was running slower for AMC than in version 1.113.
AnalysisSee [2] for analysis. In summary the ChainDeferral used to only test generation 0. Generation 1 wouldn't get collected when it was full, but would get collected the next time generation 0 filled up. This meant that generation 1 was effectively larger, but less well regulated.

The fix is to add half generation 0's size to generation 1, and recommend retuning of chain parameters.
How foundmanual_test
Evidence[1] "Benchmark comparison with 1.113" <>
[2] "Re: Benchmark comparison with 1.113" <>
Created byDavid Lovemore
Created on2014-07-04 13:44:42
Last modified byDavid Lovemore
Last modified on2014-07-04 13:49:31
History2014-07-04 DL Created


Change Effect Date User Description
186824 closed 2014-07-04 13:32:45 David Lovemore Adjust generation sizes for the default chain.
Add release note recommending retuning of generation sizes.