Genius! perl -V | grep -i largefile shows
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef cc='/usr/sfw/bin/gcc', ccflags ='-D_REENTRANT -fno-strict-aliasing + -pipe -Wdeclaration-after-statement -D_LARGEFILE_SOURCE -D_FILE_OFFS +ET_BITS=64 -DPERL_USE_SAFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_S +AFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_S +AFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_S +AFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_SAFE_PUTENV -DPERL_USE_S +AFE_PUTENV -DPERL_USE_SAFE_PUTENV',
So it does have the two things you mentioned. httpd -V says:
Server version: Apache/2.2.8 (Unix) Server built: Apr 24 2008 11:03:10 Server's Module Magic Number: 20051115:11 Server loaded: APR 1.2.12, APR-Util 1.2.12 Compiled using: APR 1.2.12, APR-Util 1.2.12 Architecture: 32-bit Server MPM: Prefork threaded: no forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/prefork" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_FCNTL_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="/opt/custom/apache" -D SUEXEC_BIN="/opt/custom/apache/bin/suexec" -D DEFAULT_PIDLOG="logs/httpd.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_LOCKFILE="logs/accept.lock" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="conf/mime.types" -D SERVER_CONFIG_FILE="conf/httpd.conf"
I don't see anything similar about large file support. The os is Solaris 2.10. I don't know how to check it for large file support.

In reply to Re^6: CGI::Application file uploads buffering by Anonymous Monk
in thread CGI::Application file uploads buffering by Anonymous Monk

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