Hi all, we are evaluating indexing performance of V2.3.5, comparing with V1.7.5, the cluster nodes of the two versions are the same as:
o 1 client node o 8 data nodes o 3 masters nodes o standard analyzer o the same source documents on the same index o same mappings and settings including shard number and replicas
we are using scroll API on a jump box node inside the cluster to do indexing test and getting below data:
in V1.7.5 indexing time of tests by locales:
in V2.3.5 indexing time of tests by locales:
as can be seen indexing time of all tests grows in V2.3.5 test.
I saw there's change about doc value default change write on disk in V2.3.5 which will bring up to 25% slower performance:
but above performance data in our testing shows it's much more than 25%. (like en-us one it's 50%), any one can help explain why this happened in our testing?
or is there any default changes in V2.X we need to care in this comparison?