WL#16940 Log available Server resources at Startup

Description:
  The MySQL server uses different methods to identify the total number
of logical CPUs and total physical memory it can access. This worklog
allows the MySQL server to log this information at startup. This change
is seen only during normal startup i.e., when neither of `help`,
`validate-config`, `initialize` or `initialize-insecure` is passed. This
information is printed after the PID of the process is logged.

Change-Id: Ifb34a6c867f6a957f8ce2d7c66ce051d2cd35409

Author: ram1048

mysql-test/suite/perfschema/r/error_log.result

@@ -98,6 +98,8 @@ ORDER BY logged, error_code;
 prio	error_code	subsystem
 System	MY-015015	Server
 System	MY-010116	Server
+System	MY-015569	Server
+System	MY-015569	Server
 Warning	MY-010075	Server
 System	MY-013576	InnoDB
 Note	MY-012944	InnoDB
@@ -161,7 +163,7 @@ AND prio!="Note"
 "MY-000067", "MY-010159", "MY-013595", "MY-013602",
 "MY-010108", "MY-012363", "MY-013711", "MY-013908",
 "MY-013930", "MY-000068", "MY-015015", "MY-010101",
-"MY-010099", "MY-011070")
+"MY-010099", "MY-011070", "MY-015569")
 ORDER BY logged;
 prio	error_code	subsystem	data
 System	MY-013576	InnoDB	InnoDB initialization has started.

mysql-test/suite/perfschema/t/error_log.test

@@ -182,6 +182,7 @@ SELECT prio,error_code,subsystem
 # MY-010099: ER_SEC_FILE_PRIV_DIRECTORY_INSECURE
 # MY-010101: ER_SEC_FILE_PRIV_DIRECTORY_PERMISSIONS
 # MY-011070: ER_DEPRECATE_MSG_NO_REPLACEMENT
+# MY-015569: ER_SERVER_STARTING_WITH_RESOURCE, emits vcpus count and memory which varies with system
 SELECT prio,error_code,subsystem,data
   FROM performance_schema.error_log
  WHERE logged>=@startup
@@ -191,7 +192,7 @@ SELECT prio,error_code,subsystem,data
                          "MY-000067", "MY-010159", "MY-013595", "MY-013602",
                          "MY-010108", "MY-012363", "MY-013711", "MY-013908",
                          "MY-013930", "MY-000068", "MY-015015", "MY-010101",
-                         "MY-010099", "MY-011070")
+                         "MY-010099", "MY-011070", "MY-015569")
  ORDER BY logged;
 
 --echo

share/messages_to_error_log.txt

@@ -13137,6 +13137,9 @@ ER_VAR_REGISTRATION
 ER_VAR_DEREGISTRATION
   eng "Cannot unregister variable '%s.%s'. Please check if it was registered properly in the first place."
 
+ER_SERVER_STARTING_WITH_RESOURCE
+   eng "MySQL Server has access to %llu %s."
+
 ################################################################################
 # Error numbers 50000 to 51999 are reserved. Please do not use them for
 # other error messages.

sql/mysqld.cc

@@ -721,6 +721,7 @@ MySQL clients support the protocol:
 #include "myisam.h"
 #include "mysql/binlog/event/binlog_event.h"
 #include "mysql/binlog/event/control_events.h"
+#include "mysql/components/library_mysys/my_system.h"  // my_num_vcpus
 #include "mysql/components/services/bits/psi_bits.h"
 #include "mysql/components/services/log_builtins.h"
 #include "mysql/components/services/log_shared.h"
@@ -6579,6 +6580,20 @@ void unregister_server_telemetry_loggers() {
   mysql_log_client_unregister(err_loggers, std::size(err_loggers));
 }
 
+/**
+  Log the system resources available to the server. The resources includes the
+number of logical CPUs and total physical memory.
+*/
+static inline void print_available_resources() {
+  if (!(opt_help || opt_validate_config || opt_initialize ||
+        opt_initialize_insecure)) {
+    LogErr(SYSTEM_LEVEL, ER_SERVER_STARTING_WITH_RESOURCE, my_num_vcpus(),
+           "logical CPUs");
+    LogErr(SYSTEM_LEVEL, ER_SERVER_STARTING_WITH_RESOURCE, my_physical_memory(),
+           "bytes of physical memory");
+  }
+}
+
 int init_common_variables() {
 #if defined(HAVE_BUILD_ID_SUPPORT)
   my_find_build_id(server_build_id);
@@ -6779,6 +6794,8 @@ int init_common_variables() {
   DBUG_PRINT("info", ("%s  Ver %s for %s on %s\n", my_progname, server_version,
                       SYSTEM_TYPE, MACHINE_TYPE));
 
+  print_available_resources();
+
 #ifdef HAVE_LINUX_LARGE_PAGES
   /* Initialize large page size */
   if (opt_large_pages && (opt_large_page_size = my_get_large_page_size())) {