maxvec¶
Purpose¶
Returns maximum vector length allowed.
Format¶
-
y =
maxvec()¶ - Returns:
y (scalar) – maximum vector length.
Global Input¶
- __maxvec:
(scalar) maximum vector length allowed.
Examples¶
y = maxvec;
print y;
20000.000
Remarks¶
maxvec() returns the value in the global scalar __maxvec, which can be
reset in the calling program.
maxvec() is called by Run-Time Library functions and applications when
determining how many rows can be read from a dataset in one call to
readr.
Using a value that is too large can cause excessive disk thrashing. The trick is to allow the algorithm making the disk reads to execute entirely in RAM.
Source¶
system.src