Hello hackers,
Mateusz Guzik was benchmarking PostgreSQL on FreeBSD investigating the
kqueue thread and complained off-list about a lot of calls to memset()
of size 256KB from dopr() in our snprintf.c code.
Yeah, that says:
PrintfArgType argtypes[NL_ARGMAX + 2];
...
MemSet(argtypes, 0, sizeof(argtypes));
PrintfArgType is an enum, and we define NL_ARGMAX as 16 if the OS
didn't already define it. On FreeBSD 11, NL_ARGMAX was defined as 99
in <limits.h>. On FreeBSD 12, it is defined as 65536... ouch. On a
Debian box I see it is 4096.
Is there any reason to use the OS definition here?
--
Thomas Munro
http://www.enterprisedb.com
