1 files changed, 7 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc
index 1690bc40e33..30bc045f7a1 100644
--- a/sql/sys_vars.cc
+++ b/sql/sys_vars.cc
@@ -5402,3 +5402,10 @@ static Sys_var_ulong Sys_log_tc_size(
        DEFAULT(my_getpagesize() * 6),
        BLOCK_SIZE(my_getpagesize()));
 #endif
+
+static Sys_var_ulonglong Sys_max_thread_mem(
+       "max_session_mem_used", "Amount of memory a single user session "
+       "is allowed to allocate. This limits the value of the "
+       "session variable MEM_USED", SESSION_VAR(max_mem_used),
+       CMD_LINE(REQUIRED_ARG), VALID_RANGE(8192,  ULONGLONG_MAX),
+       DEFAULT(LONGLONG_MAX), BLOCK_SIZE(1));