[Pkg-openldap-devel] Bug#378261: slapd fails under heavy load due to descriptor limit

[Russ Allbery]

The problem here is only on 32-bit Linux, where the file descriptor set
size is capped by default at 1024.  It looks like OpenLDAP is already
increasing this to 4096, since I see no sign of that number anywhere in
glibc's default headers and include/ac/fdset.h has:

#if !defined( OPENLDAP_FD_SETSIZE ) && !defined( FD_SETSIZE )
#  define OPENLDAP_FD_SETSIZE 4096
#endif

#ifdef OPENLDAP_FD_SETSIZE
    /* assume installer desires to enlarge fd_set */
#  ifdef HAVE_BITS_TYPES_H
#    include <bits/types.h>
#  endif
#  ifdef __FD_SETSIZE
#    undef __FD_SETSIZE
#    define __FD_SETSIZE OPENLDAP_FD_SETSIZE
#  else
#    define FD_SETSIZE OPENLDAP_FD_SETSIZE
#  endif
#endif

I don't see much drawback to bumping this to 8192, which seems to be what
the thread is requesting.  Did I miss anything here?

-- 
Russ Allbery (rra at debian.org)               <http://www.eyrie.org/~eagle/>