Github user nonstop-qfchen commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/30#discussion_r34824579
--- Diff: core/sql/sqlcomp/nadefaults.cpp ---
@@ -3517,6 +3517,7 @@ XDDkwd__(SUBQUERY_UNNESTING, "ON"),
XDDui1__(USTAT_MIN_ROWCOUNT_FOR_LOW_SAMPLE, "1000000"),
XDDui1__(USTAT_MIN_ROWCOUNT_FOR_SAMPLE, "10000"),
DDflt0_(USTAT_MODIFY_DEFAULT_UEC, "0.05"),
+ DDflt0_(USTAT_NAHEAP_ESTIMATED_MAX, "1.3"), // estimated max
memory allocation feasible with NAHEAP.
--- End diff --
Will add a comment. The unit is in GB.
On Thu, Jul 16, 2015 at 1:51 PM, DaveBirdsall <[email protected]>
wrote:
> In core/sql/sqlcomp/nadefaults.cpp
>
<https://github.com/apache/incubator-trafodion/pull/30#discussion_r34823772>
> :
>
> > @@ -3517,6 +3517,7 @@ XDDkwd__(SUBQUERY_UNNESTING,
"ON"),
> > XDDui1__(USTAT_MIN_ROWCOUNT_FOR_LOW_SAMPLE, "1000000"),
> > XDDui1__(USTAT_MIN_ROWCOUNT_FOR_SAMPLE, "10000"),
> > DDflt0_(USTAT_MODIFY_DEFAULT_UEC, "0.05"),
> > + DDflt0_(USTAT_NAHEAP_ESTIMATED_MAX, "1.3"), // estimated
max memory allocation feasible with NAHEAP.
>
> What units are used for this default?
>
> â
> Reply to this email directly or view it on GitHub
> <https://github.com/apache/incubator-trafodion/pull/30/files#r34823772>.
>
--
Regards, --Qifan
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