optimistic-transaction: remove reference to being "default" (pingcap#…

…3146) * optimistic-transaction: remove reference to being "default" No longer accurate in 3.0+ * Update optimistic-transaction.md Co-authored-by: Jack Yu <yusp@pingcap.com> * Update optimistic-transaction.md Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com> Co-authored-by: Jack Yu <yusp@pingcap.com> Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com>
hawkingrei · Jul 8, 2020 · e65391c · e65391c
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diff --git a/optimistic-transaction.md b/optimistic-transaction.md
@@ -9,7 +9,7 @@ aliases: ['/docs/dev/optimistic-transaction/','/docs/dev/reference/transactions/
 
 This document introduces the principles of TiDB's optimistic transaction model and related features.
 
-TiDB uses the optimistic transaction model by default. In TiDB's optimistic transaction model, for write-write conflicts, the two-phase commit begins only when the transaction is committed.
+In TiDB's optimistic transaction model, write-write conflicts are detected only at the two-phase transactional commit.
 
 > **Note:**
 >