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-rw-r--r--src/docs/upgrading.dox12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/docs/upgrading.dox b/src/docs/upgrading.dox
index e80c955a4a9..e0239919f0b 100644
--- a/src/docs/upgrading.dox
+++ b/src/docs/upgrading.dox
@@ -14,6 +14,18 @@ already-deleted rows.) To match the previous behavior, specify the
\c append configuration string when opening the column-store bulk-load
cursor; this causes the cursor's key to be ignored and each inserted row
will be assigned the next record number.
+</dd>
+
+<dt>Change to WT_SESSION::truncate with URI</dt>
+<dd>
+If using the WT_SESSION::truncate API with a file: URI for a full table
+truncate, underlying algorithmic changes result in some visible differences.
+This call can now return WT_ROLLBACK. Applications should be prepared to
+handle this error. This method no longer requires exclusive access to the
+table. Also the underlying disk space may not be immediately
+reclaimed when the call returns. The performance of this API may differ
+from earlier releases.
+</dd>
</dl><hr>
@section version_270 Upgrading to Version 2.7.0