diff --git a/fdbserver/DiskQueue.actor.cpp b/fdbserver/DiskQueue.actor.cpp
index b1a12c21dd..5e5dffb443 100644
--- a/fdbserver/DiskQueue.actor.cpp
+++ b/fdbserver/DiskQueue.actor.cpp
@@ -347,8 +347,7 @@ public:
 				if (self->files[1].size > desiredMaxFileSize || frivolouslyTruncate) {
 					// Either shrink self->files[1] to the size of self->files[0], or chop off fileShrinkBytes
 					int64_t maxShrink = pageFloor( std::max( self->files[1].size - desiredMaxFileSize, self->fileShrinkBytes ) );
-					if ((maxShrink / SERVER_KNOBS->DISK_QUEUE_FILE_EXTENSION_BYTES >
-					     SERVER_KNOBS->DISK_QUEUE_MAX_TRUNCATE_EXTENTS) ||
+					if ((maxShrink > SERVER_KNOBS->DISK_QUEUE_MAX_TRUNCATE_BYTES) ||
 					    (frivolouslyTruncate && g_random->random01() < 0.3)) {
 						TEST(true);  // Replacing DiskQueue file
 						TraceEvent("DiskQueueReplaceFile", self->dbgid).detail("Filename", self->files[1].f->getFilename()).detail("OldFileSize", self->files[1].size).detail("ElidedTruncateSize", maxShrink);
diff --git a/fdbserver/Knobs.cpp b/fdbserver/Knobs.cpp
index 4c551d4791..e79839af5f 100644
--- a/fdbserver/Knobs.cpp
+++ b/fdbserver/Knobs.cpp
@@ -75,7 +75,7 @@ ServerKnobs::ServerKnobs(bool randomize, ClientKnobs* clientKnobs) {
 	init( TLOG_SPILL_REFERENCE_MAX_BYTES_PER_BATCH,           16<<10 ); if ( randomize && BUGGIFY ) TLOG_SPILL_REFERENCE_MAX_BYTES_PER_BATCH = 500;
 	init( DISK_QUEUE_FILE_EXTENSION_BYTES,                    10<<20 ); // BUGGIFYd per file within the DiskQueue
 	init( DISK_QUEUE_FILE_SHRINK_BYTES,                      100<<20 ); // BUGGIFYd per file within the DiskQueue
-	init( DISK_QUEUE_MAX_TRUNCATE_EXTENTS,                     1<<10 ); if ( randomize && BUGGIFY ) DISK_QUEUE_MAX_TRUNCATE_EXTENTS = 0;
+	init( DISK_QUEUE_MAX_TRUNCATE_BYTES,                       2<<30 ); if ( randomize && BUGGIFY ) DISK_QUEUE_MAX_TRUNCATE_BYTES = 0;
 	init( TLOG_DEGRADED_DELAY_COUNT,                               5 );
 	init( TLOG_DEGRADED_DURATION,                                5.0 );
 
diff --git a/fdbserver/Knobs.h b/fdbserver/Knobs.h
index ee91df4ad8..119656e3eb 100644
--- a/fdbserver/Knobs.h
+++ b/fdbserver/Knobs.h
@@ -79,7 +79,7 @@ public:
 	int64_t TLOG_SPILL_REFERENCE_MAX_BYTES_PER_BATCH;
 	int64_t DISK_QUEUE_FILE_EXTENSION_BYTES; // When we grow the disk queue, by how many bytes should it grow?
 	int64_t DISK_QUEUE_FILE_SHRINK_BYTES; // When we shrink the disk queue, by how many bytes should it shrink?
-	int DISK_QUEUE_MAX_TRUNCATE_EXTENTS;
+	int DISK_QUEUE_MAX_TRUNCATE_BYTES;  // A truncate larger than this will cause the file to be replaced instead.
 	int TLOG_DEGRADED_DELAY_COUNT;
 	double TLOG_DEGRADED_DURATION;