diff --git a/src/osal.c b/src/osal.c
index e120490a..99bcd7cd 100644
--- a/src/osal.c
+++ b/src/osal.c
@@ -621,8 +621,12 @@ MDBX_INTERNAL_FUNC int osal_ioring_create(osal_ioring_t *ior,
 #endif /* !Windows */
 
 #if MDBX_HAVE_PWRITEV && defined(_SC_IOV_MAX)
-  if (!osal_iov_max)
+  if (!osal_iov_max) {
     osal_iov_max = sysconf(_SC_IOV_MAX);
+    if (RUNNING_ON_VALGRIND && osal_iov_max > 64)
+      /* чтобы не описывать все 1024 исключения в valgrind_suppress.txt */
+      osal_iov_max = 64;
+  }
 #endif
 
   ior->boundary = (char *)(ior->pool + ior->allocated);
diff --git a/test/valgrind_suppress.txt b/test/valgrind_suppress.txt
index 2eb3142b..2a95ff0f 100644
--- a/test/valgrind_suppress.txt
+++ b/test/valgrind_suppress.txt
@@ -33,16 +33,22 @@
 
 # memcmp() inside iov_write() as workaround for todo4recovery://erased_by_github/libmdbx/issues/269
 {
-   write-page-check-bcmp
+   iov-pagecheck-1
    Memcheck:Cond
    fun:bcmp
-   fun:iov_write*
+   fun:iov_callback4dirtypages
+   fun:osal_ioring_walk
+   fun:iov_complete
+   fun:iov_write
 }
 {
-   write-page-check-memcmp
+   iov-pagecheck-2
    Memcheck:Cond
    fun:memcmp*
-   fun:iov_write*
+   fun:iov_callback4dirtypages
+   fun:osal_ioring_walk
+   fun:iov_complete
+   fun:iov_write
 }
 
 # single-page flush by pwrite()