Today (Saturday) We will make some minor tuning adjustments to MySQL.

You may experience 2 up to 10 seconds "glitch time" when we restart MySQL. We expect to make these adjustments around 1AM Eastern Daylight Saving Time (EDT) US.

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

OSX 10.14 Mojave - man page for m_sqrt2 (mojave section 3)

M_PI(3) 						   BSD Library Functions Manual 						   M_PI(3)

constants -- mathematical library constants
#include <math.h>
The header file math.h provides macros that define a number of useful numerical constants.
As required by the POSIX standard, these constants are double-precision literals, with enough digits specified as to ensure that they are correctly rounded in double-precision: M_E "Euler's constant" or e; the base of the natural logarithm. M_LOG2E M_LOG10E The logarithms of e in base 2 and 10, respectively. M_LN2 M_LN10 The natural logarithms of 2 and 10, respectively. Note that these are the reciprocals of the preceeding two values. M_PI M_PI_2 M_PI_4 pi, pi/2, and pi/4, respectively. M_1_PI M_2_PI 1/pi and 2/pi, respectively. M_2_SQRTPI Two divided by the square root of pi. M_SQRT2 M_SQRT_1_2 The square root of two and its reciprocal, respectively.
math(3), float(3),
The <math.h> functions and macros conform to the ISO/IEC 9899:2011 standard.
July 6, 2010 BSD

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