Enable memory profiling at runtime #822

Added two new Admin command:
* PROXYSQL MEMPROFILE START
* PROXYSQL MEMPROFILE STOP

lib/ProxySQL_Admin.cpp

@@ -517,6 +517,21 @@ bool admin_handler_command_proxysql(char *query_no_space, unsigned int query_no_
 		return false;
 	}
 
+#ifndef NOJEM
+	if (query_no_space_length==strlen("PROXYSQL MEMPROFILE START") && !strncasecmp("PROXYSQL MEMPROFILE START",query_no_space, query_no_space_length)) {
+		bool en=true;
+		mallctl("prof.active", NULL, NULL, &en, sizeof(bool));
+		SPA->send_MySQL_OK(&sess->client_myds->myprot, NULL);
+		return false;
+	}
+	if (query_no_space_length==strlen("PROXYSQL MEMPROFILE STOP") && !strncasecmp("PROXYSQL MEMPROFILE STOP",query_no_space, query_no_space_length)) {
+		bool en=false;
+		mallctl("prof.active", NULL, NULL, &en, sizeof(bool));
+		SPA->send_MySQL_OK(&sess->client_myds->myprot, NULL);
+		return false;
+	}
+#endif
+
 	if (query_no_space_length==strlen("PROXYSQL KILL") && !strncasecmp("PROXYSQL KILL",query_no_space, query_no_space_length)) {
 		proxy_info("Received PROXYSQL KILL command\n");
 		exit(EXIT_SUCCESS);

src/main.cpp

@@ -131,7 +131,8 @@ static volatile int load_;
 //#ifdef DEBUG
 //const char *malloc_conf = "xmalloc:true,lg_tcache_max:16,purge:decay,junk:true,tcache:false";
 //#else
-const char *malloc_conf = "xmalloc:true,lg_tcache_max:16,purge:decay";
+//const char *malloc_conf = "xmalloc:true,lg_tcache_max:16,purge:decay";
+const char *malloc_conf = "xmalloc:true,lg_tcache_max:16,purge:decay,prof:true,prof_leak:true,lg_prof_sample:20,lg_prof_interval:30,prof_active:false";
 //#endif /* DEBUG */
 //const char *malloc_conf = "prof_leak:true,lg_prof_sample:0,prof_final:true,xmalloc:true,lg_tcache_max:16";