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-rw-r--r--storage/xtradb/include/os0file.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/storage/xtradb/include/os0file.h b/storage/xtradb/include/os0file.h
index a75091589c6..1ab71d80829 100644
--- a/storage/xtradb/include/os0file.h
+++ b/storage/xtradb/include/os0file.h
@@ -168,8 +168,8 @@ enum os_file_create_t {
#define OS_FILE_LOG 256 /* This can be ORed to type */
/* @} */
-#define OS_AIO_N_PENDING_IOS_PER_THREAD 256 /*!< Windows might be able to handle
-more */
+#define OS_AIO_N_PENDING_IOS_PER_THREAD 32 /*!< Win NT does not allow more
+ than 64 */
/** Modes for aio operations @{ */
#define OS_AIO_NORMAL 21 /*!< Normal asynchronous i/o not for ibuf