Add pg_stat_statements WAL usage: implement in 'profile'.

cmd/report/report.go

@@ -155,6 +155,8 @@ func selectReport(opts options) string {
 			return "statements_temp"
 		case "l":
 			return "statements_local"
+		case "w":
+			return "statements_wal"
 		}
 	case opts.showProgress != "":
 		switch opts.showProgress {

cmd/report/report_test.go

@@ -48,6 +48,7 @@ func Test_selectReport(t *testing.T) {
 		{opts: options{showStatements: "i"}, want: "statements_io"},
 		{opts: options{showStatements: "t"}, want: "statements_temp"},
 		{opts: options{showStatements: "l"}, want: "statements_local"},
+		{opts: options{showStatements: "w"}, want: "statements_wal"},
 		{opts: options{showProgress: "v"}, want: "progress_vacuum"},
 		{opts: options{showProgress: "c"}, want: "progress_cluster"},
 		{opts: options{showProgress: "i"}, want: "progress_index"},

report/describe.go

@@ -387,6 +387,25 @@ Details: https://www.postgresql.org/docs/current/pgstatstatements.html
 
 * - extended value, based on origin and calculated using additional functions.
 
+Details: https://www.postgresql.org/docs/current/pgstatstatements.html
+`
+
+	// pgStatStatementsWalDescription is the detailed description of pg_stat_statements section about WAL usage
+	pgStatStatementsWalDescription = `Statements WAL usage statistics based on pg_stat_statements:
+
+  column	origin			description
+- user		rolname			Name of of user who executed the statement
+- database	datname			Name of database in which the statement was executed
+- t_wal		wal_bytes		Total amount of WAL bytes generated by the statement, in kB
+- wal		wal_bytes		Total amount of WAL bytes generated by the statement, in kB/s
+- wal_records	wal_records		Total number of WAL records generated by the statement, in records/s
+- wal_fpi	wal_fpi			Total number of WAL full page images generated by the statement, in fpi/s
+- calls		calls			Number of times query executed, calls/s
+- queryid*	rolname,datname,query	Fake queryid based on username, datname and text of the statement
+- query		query			Text of a representative statement
+
+* - extended value, based on origin and calculated using additional functions.
+
 Details: https://www.postgresql.org/docs/current/pgstatstatements.html
 `
 )

report/report.go

@@ -412,6 +412,7 @@ func describeReport(w io.Writer, report string) error {
 		"statements_io":       pgStatStatementsIODescription,
 		"statements_local":    pgStatStatementsTempDescription,
 		"statements_temp":     pgStatStatementsLocalDescription,
+		"statements_wal":      pgStatStatementsWalDescription,
 	}
 
 	if description, ok := m[report]; ok {

report/report_test.go

@@ -83,6 +83,11 @@ func Test_app_doReport(t *testing.T) {
 			config:   Config{ReportType: "statements_temp", TruncLimit: 32, Rate: time.Second},
 			wantFile: "testdata/report_statements_temp.golden",
 		},
+		{
+			start: "2021-01-23 15:31:00", end: "2021-01-23 15:32:00",
+			config:   Config{ReportType: "statements_wal", TruncLimit: 32, Rate: time.Second},
+			wantFile: "testdata/report_statements_wal.golden",
+		},
 		{
 			start: "2021-01-23 15:31:00", end: "2021-01-23 15:32:00",
 			config:   Config{ReportType: "progress_vacuum", TruncLimit: 32, Rate: time.Second},

top/menu_test.go

@@ -11,7 +11,7 @@ func Test_selectMenuStyle(t *testing.T) {
 		want int
 	}{
 		{menu: menuNone, want: 0},
-		{menu: menuPgss, want: 5},
+		{menu: menuPgss, want: 6},
 		{menu: menuProgress, want: 5},
 		{menu: menuConf, want: 4},
 	}