WT-6800 Insert one key per transaction to make test_txn24 pass on mac…

…OS (#6273)

test/suite/test_txn24.py

@@ -72,22 +72,16 @@ def test_snapshot_isolation_and_eviction(self):
         session2 = self.setUpSessionOpen(self.conn)
         cursor2 = session2.open_cursor(uri)
         start_row = int(n_rows/4)
-        for i in range(0, 120):
-            session2.begin_transaction('isolation=snapshot')
-            for j in range(0,1000):
-                cursor2[start_row] = new_val
-                start_row += 1
-            session2.commit_transaction()
+        for i in range(0, 120000):
+            cursor2[start_row] = new_val
+            start_row += 1
 
         session3 = self.setUpSessionOpen(self.conn)
         cursor3 = session3.open_cursor(uri)
         start_row = int(n_rows/2)
-        for i in range(0, 120):
-            session3.begin_transaction('isolation=snapshot')
-            for j in range(0,1000):
-                cursor3[start_row] = new_val
-                start_row += 1
-            session3.commit_transaction()
+        for i in range(0, 120000):
+            cursor3[start_row] = new_val
+            start_row += 1
 
         # At this point in time, we have made roughly 90% cache dirty. If we are not using
         # snaphsots for eviction threads, the cache state will remain like this forever and we may
@@ -101,12 +95,9 @@ def test_snapshot_isolation_and_eviction(self):
         session4 = self.setUpSessionOpen(self.conn)
         cursor4 = session4.open_cursor(uri)
         start_row = 1
-        for i in range(0, 120):
-            session4.begin_transaction('isolation=snapshot')
-            for j in range(0,1000):
-                cursor4[start_row] = new_val
-                start_row += 1
-            session4.commit_transaction()
+        for i in range(0, 120000):
+            cursor4[start_row] = new_val
+            start_row += 1
 
         # If we have done all operations error free so far, eviction threads have been successful.