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-rw-r--r--lib/PublicInbox/SearchIdx.pm3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 04e85306..bb60506c 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -22,7 +22,8 @@ require PublicInbox::Git;
 use Compress::Zlib qw(compress);
 
 use constant {
-        BATCH_BYTES => 1_000_000,
+        BATCH_BYTES => defined($ENV{XAPIAN_FLUSH_THRESHOLD}) ?
+                        0x7fffffff : 1_000_000,
         DEBUG => !!$ENV{DEBUG},
 };