AUTO_FLUSH_BACKGROUND is supported in Impala 2.7?

[Jason Heo]

Hi.

I'm using (Impala + Kudu) on CDH 5.10


> version;
Shell version: Impala Shell v2.7.0-cdh5.10.0 (785a073) built on Fri Jan 20
12:03:56 PST 2017
Server version: impalad version 2.7.0-cdh5.10.0 RELEASE (build
785a073cd07e2540d521ecebb8b38161ccbd2aa2)

I've read IMPALA-4134
<https://issues-test.apache.org/jira/browse/IMPALA-4134>, I'm wondering if
AUTO_FLUSH_BACKGROUND is enabled by default impala 2.7

Thanks.