add pg-spam

cmd/pg-spam/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"sync/atomic"
+	"time"
+
+	"gitea.bel.blue/bel/with"
+
+	_ "github.com/lib/pq"
+)
+
+func main() {
+	if err := with.Context(run); err != nil {
+		panic(err)
+	}
+}
+
+func run(ctx context.Context) error {
+	fs := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
+	c := fs.String("c", "sqlite://", "conn string")
+	rps := fs.Int("rps", 1, "connections per second")
+	if err := fs.Parse(os.Args[1:]); err != nil {
+		panic(err)
+	}
+
+	return with.SQL(ctx, *c, func(pg *sql.DB) error {
+		stderr := log.Writer()
+		log.SetOutput(io.Discard)
+
+		var okays atomic.Uint64
+		var errs atomic.Uint64
+		d := time.Second / time.Duration(*rps)
+		go with.Every(ctx, 1*time.Second, func() {
+			fmt.Fprintf(stderr, "%v connections, %v failures\n", okays.Load(), errs.Load())
+		})
+		with.GoEvery(ctx, d, func() {
+			if err := with.SQL(ctx, *c, func(pg *sql.DB) error {
+				return nil
+			}); err != nil {
+				fmt.Fprintf(stderr, "err: %v\n", err)
+				errs.Add(1)
+			} else {
+				okays.Add(1)
+			}
+		})
+		return ctx.Err()
+	})
+}