use PublicInbox::Git qw(git_unquote);
use PublicInbox::MsgTime qw(msg_timestamp msg_datestamp);
use PublicInbox::Address;
+use Config;
our @EXPORT_OK = qw(log2stack is_ancestor check_size prepare_stack
index_text term_generator add_val is_bad_blob);
my $X = \%PublicInbox::Search::X;
our ($DB_CREATE_OR_OPEN, $DB_OPEN);
our $DB_NO_SYNC = 0;
-our $BATCH_BYTES = $ENV{XAPIAN_FLUSH_THRESHOLD} ? 0x7fffffff : 1_000_000;
+our $BATCH_BYTES = $ENV{XAPIAN_FLUSH_THRESHOLD} ? 0x7fffffff :
+ # assume a typical 64-bit system has 8x more RAM than a
+ # typical 32-bit system:
+ (($Config{ptrsize} >= 8 ? 8192 : 1024) * 1024);
+
use constant DEBUG => !!$ENV{DEBUG};
my $xapianlevels = qr/\A(?:full|medium)\z/;