How db.Size function helps to decide how often to do GC

Users Badger
2 
package main

import (
	"fmt"
	"log"
	"time"

	"github.com/dgraph-io/badger/v3"
)

func main() {
	// Open the Badger database
	opts := badger.DefaultOptions("").WithInMemory(true)
	db, err := badger.Open(opts)
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	// Run a ticker to periodically check the size and run GC
	ticker := time.NewTicker(10 * time.Second)
	defer ticker.Stop()

	for range ticker.C {
		lsmSize, vlogSize := db.Size()

		fmt.Printf("LSM Size: %d bytes, Vlog Size: %d bytes\n", lsmSize, vlogSize)

		// Define a threshold for when to run GC
		const gcThreshold int64 = 100 * 1024 * 1024 // 100 MB

		if vlogSize > gcThreshold {
			fmt.Println("Running value log GC...")
			err := db.RunValueLogGC(0.5) // 0.5 is the discard ratio
			if err != nil {
				if err != badger.ErrNoRewrite {
					log.Printf("Error running GC: %v\n", err)
				}
			} else {
				fmt.Println("GC completed successfully")
			}
		}
	}
}```