Import wiredtiger: 60a06941b8d5d7ddc9f93646e75fc4b52d40f9b4 from branch mongodb-3.8

ref: f428c0667e..60a06941b8
for: 3.7.3

WT-3815       Cursor caching: measure and tune performance
WT-3868       Bi-weekly WT codebase lint
WT-3930       Set the recovery timestamp even if recovery doesn't run
WT-3936       Add multi-threaded tests for prepare_transaction()
WT-3938       Reduce memory usage with many tables and sessions
WT-3942       Update test_compact02 to handle being halted by eviction pressure.
WT-3948       Data handle loop may terminate without applying operations
WT-3949       Buffer overflow in WT_CURSOR::modify for string values
WT-3952       page-delete update list traversed after it has been discarded.
WT-3953       test/format can attempt to set an illegal prepare timestamp
WT-3954       test/format: prepared operations evicted before commit
WT-3961       The all_committed timestamp should be less than any in-flight transaction
WT-3964       Stop wrapping schema operations in a transaction
WT-3967       Fix long test for cursor cache sweep

1 files changed, 1 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/test/format/format.h b/src/third_party/wiredtiger/test/format/format.h
index 8c14a9f43fb..d277fb1a915 100644
--- a/src/third_party/wiredtiger/test/format/format.h
+++ b/src/third_party/wiredtiger/test/format/format.h
@@ -267,6 +267,7 @@ typedef struct {
 	WT_RAND_STATE rnd;			/* thread RNG state */
 
 	uint64_t commit;			/* transaction resolution */
+	uint64_t prepare;
 	uint64_t rollback;
 	uint64_t deadlock;