IQ_USE_DIRECTIO Environment Variable

IQ_USE_DIRECTIO enables direct I/O on supported simplex platforms.

The IQ_USE_DIRECTIO environment variable defaults to the setting 0. To enable direct I/O on a supported platform, set IQ_USE_DIRECTIO to 1. Multiplex databases do not support direct I/O.

Setting

IQ_USE_DIRECTIO = value

Operating System

Optional on Sun Solaris UFS, Linux, Linux IBM, AIX, and Windows file systems only. In Linux, direct I/O is supported in kernel versions 2.6.x.

Not used on HP-UX and HP-UXi platforms.

IQ_USE_DIRECTIO has no effect on Sun Solaris and Windows.

Parent topic: Environment Variables