tunables.conf(5) File Formats Manual tunables.conf(5) (NAME) tunables.conf - (tunables) (SYNOPSIS) /etc/tunables.conf (DESCRIPTION) (Tunables) (GNU C Library) . ldconfig(8) /etc/ld.so.cache . . /etc/tunables.conf (tunable) (directive) (filter) . (Tunables) name=value. . glibc : $ ld.so --list-tunables; (Directives) include path include glob(7) . . (Modifiers) . (whitespace) . overridable + GLIBC_TUNABLES ( ). nonoverridable - . onlysecure @ AT_SECURE set-user-ID . nonsecure $ -AT_SECURE ( ). anysecure * AT_SECURE -AT_SECURE . (Filters) . : o . o (included). o include. o ( ). : [filter:pattern] proc proc . (base name) . : []. . (FILES) /etc/tunables.conf /etc/ld.so.cache . (EXAMPLES) : glibc.malloc.arenas_max=5 onlysecure glibc.malloc.arenas_max=1 -glibc.pthread.rseq=1 [proc:/bin/bad.program] -glibc.pthread.rseq=0 [proc:some.program] -glibc.malloc.mmap_threshold=65536 (SEE ALSO) ld.so(8), ldconfig(8) Linux man-pages 6.19 2026-08-25 tunables.conf(5)