diff --git a/src/gausskernel/storage/ipc/procarray.cpp b/src/gausskernel/storage/ipc/procarray.cpp
index 5e7d069cdab6c4795f84b79c8cc84a9665612db6..926442550492d9a390ab1dc58c2d38eac4f7f438 100644
--- a/src/gausskernel/storage/ipc/procarray.cpp
+++ b/src/gausskernel/storage/ipc/procarray.cpp
@@ -4054,6 +4054,12 @@ void CalculateLocalLatestSnapshot(bool forceCalc)
             volatile PGXACT* pgxact = &g_instance.proc_base_all_xacts[pgprocno];
             TransactionId xid;
 
+            /* Update globalxmin to be the smallest valid xmin */
+            xid = pgxact->xmin; /* fetch just once */
+
+            if (TransactionIdIsNormal(xid) && TransactionIdPrecedes(xid, globalxmin))
+                globalxmin = xid;
+
             /*
              * Backend is doing logical decoding which manages xmin
              * separately, check below.
@@ -4065,12 +4071,6 @@ void CalculateLocalLatestSnapshot(bool forceCalc)
             if (pgxact->vacuumFlags & PROC_IN_VACUUM)
                 continue;
 
-            /* Update globalxmin to be the smallest valid xmin */
-            xid = pgxact->xmin; /* fetch just once */
-
-            if (TransactionIdIsNormal(xid) && TransactionIdPrecedes(xid, globalxmin))
-                globalxmin = xid;
-
             /* Fetch xid just once - see GetNewTransactionId */
             xid = pgxact->xid;