I believe that flag was renamed https://github.com/apache/drill/blob/master/exec/memory/base/src/main/java/org/apache/drill/exec/memory/BoundsChecking.java
I might not be the best person to answer this, but it involves enforcing the bounds checking of value vectors so that Drill does not access offsets beyond the limits (i.e. bounds) of value vectors. By default, Drill will do bounds checking. Disabling will improve performance, but has the potential risk of unsafe memory access which can crash a Drillbit. DRILL-5351 had a commit that reduced the number of checks, but couldn't eliminate the checks entirely. -----Original Message----- From: Muhammad Gelbana [mailto:m.gelb...@gmail.com] Sent: Monday, August 07, 2017 4:38 AM To: dev@drill.apache.org Subject: Understanding the -Dbounds JVM option This page <https://drill.apache.org/docs/configuring-drill-memory/> refers to a JVM option by the name *bounds*. I tried googling for it but I couldn't find anything. Would someone please elaborate on the effect of this option or post a link that does ? Thanks, Gelbana
