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Golang bolt.BucketStats类代码示例

本文整理汇总了Golang中github.com/boltdb/bolt.BucketStats的典型用法代码示例。如果您正苦于以下问题:Golang BucketStats类的具体用法?Golang BucketStats怎么用?Golang BucketStats使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了BucketStats类的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: Stats

// Collect stats for all top level buckets matching the prefix.
func Stats(path, prefix string) {
	if _, err := os.Stat(path); os.IsNotExist(err) {
		fatal(err)
		return
	}

	db, err := bolt.Open(path, 0600)
	if err != nil {
		fatal(err)
		return
	}
	defer db.Close()

	err = db.View(func(tx *bolt.Tx) error {
		var s bolt.BucketStats
		var count int
		var prefix = []byte(prefix)
		tx.ForEach(func(name []byte, b *bolt.Bucket) error {
			if bytes.HasPrefix(name, prefix) {
				s.Add(b.Stats())
				count += 1
			}
			return nil
		})
		printf("Aggregate statistics for %d buckets\n\n", count)

		println("Page count statistics")
		printf("\tNumber of logical branch pages: %d\n", s.BranchPageN)
		printf("\tNumber of physical branch overflow pages: %d\n", s.BranchOverflowN)
		printf("\tNumber of logical leaf pages: %d\n", s.LeafPageN)
		printf("\tNumber of physical leaf overflow pages: %d\n", s.LeafOverflowN)

		println("Tree statistics")
		printf("\tNumber of keys/value pairs: %d\n", s.KeyN)
		printf("\tNumber of levels in B+tree: %d\n", s.Depth)

		println("Page size utilization")
		printf("\tBytes allocated for physical branch pages: %d\n", s.BranchAlloc)
		var percentage int
		if s.BranchAlloc != 0 {
			percentage = int(float32(s.BranchInuse) * 100.0 / float32(s.BranchAlloc))
		}
		printf("\tBytes actually used for branch data: %d (%d%%)\n", s.BranchInuse, percentage)
		printf("\tBytes allocated for physical leaf pages: %d\n", s.LeafAlloc)
		percentage = 0
		if s.LeafAlloc != 0 {
			percentage = int(float32(s.LeafInuse) * 100.0 / float32(s.LeafAlloc))
		}
		printf("\tBytes actually used for leaf data: %d (%d%%)\n", s.LeafInuse, percentage)

		println("Bucket statistics")
		printf("\tTotal number of buckets: %d\n", s.BucketN)
		percentage = int(float32(s.InlineBucketN) * 100.0 / float32(s.BucketN))
		printf("\tTotal number on inlined buckets: %d (%d%%)\n", s.InlineBucketN, percentage)
		percentage = 0
		if s.LeafInuse != 0 {
			percentage = int(float32(s.InlineBucketInuse) * 100.0 / float32(s.LeafInuse))
		}
		printf("\tBytes used for inlined buckets: %d (%d%%)\n", s.InlineBucketInuse, percentage)

		return nil
	})
	if err != nil {
		fatal(err)
		return
	}
}
开发者ID:sclasen,项目名称:event-shuttle,代码行数:68,代码来源:stats.go

示例2: Run

// Run executes the command.
func (cmd *StatsCommand) Run(args ...string) error {
	// Parse flags.
	fs := flag.NewFlagSet("", flag.ContinueOnError)
	help := fs.Bool("h", false, "")
	if err := fs.Parse(args); err != nil {
		return err
	} else if *help {
		fmt.Fprintln(cmd.Stderr, cmd.Usage())
		return ErrUsage
	}

	// Require database path.
	path, prefix := fs.Arg(0), fs.Arg(1)
	if path == "" {
		return ErrPathRequired
	} else if _, err := os.Stat(path); os.IsNotExist(err) {
		return ErrFileNotFound
	}

	// Open database.
	db, err := bolt.Open(path, 0666, nil)
	if err != nil {
		return err
	}
	defer db.Close()

	return db.View(func(tx *bolt.Tx) error {
		var s bolt.BucketStats
		var count int
		if err := tx.ForEach(func(name []byte, b *bolt.Bucket) error {
			if bytes.HasPrefix(name, []byte(prefix)) {
				s.Add(b.Stats())
				count += 1
			}
			return nil
		}); err != nil {
			return err
		}

		fmt.Fprintf(cmd.Stdout, "Aggregate statistics for %d buckets\n\n", count)

		fmt.Fprintln(cmd.Stdout, "Page count statistics")
		fmt.Fprintf(cmd.Stdout, "\tNumber of logical branch pages: %d\n", s.BranchPageN)
		fmt.Fprintf(cmd.Stdout, "\tNumber of physical branch overflow pages: %d\n", s.BranchOverflowN)
		fmt.Fprintf(cmd.Stdout, "\tNumber of logical leaf pages: %d\n", s.LeafPageN)
		fmt.Fprintf(cmd.Stdout, "\tNumber of physical leaf overflow pages: %d\n", s.LeafOverflowN)

		fmt.Fprintln(cmd.Stdout, "Tree statistics")
		fmt.Fprintf(cmd.Stdout, "\tNumber of keys/value pairs: %d\n", s.KeyN)
		fmt.Fprintf(cmd.Stdout, "\tNumber of levels in B+tree: %d\n", s.Depth)

		fmt.Fprintln(cmd.Stdout, "Page size utilization")
		fmt.Fprintf(cmd.Stdout, "\tBytes allocated for physical branch pages: %d\n", s.BranchAlloc)
		var percentage int
		if s.BranchAlloc != 0 {
			percentage = int(float32(s.BranchInuse) * 100.0 / float32(s.BranchAlloc))
		}
		fmt.Fprintf(cmd.Stdout, "\tBytes actually used for branch data: %d (%d%%)\n", s.BranchInuse, percentage)
		fmt.Fprintf(cmd.Stdout, "\tBytes allocated for physical leaf pages: %d\n", s.LeafAlloc)
		percentage = 0
		if s.LeafAlloc != 0 {
			percentage = int(float32(s.LeafInuse) * 100.0 / float32(s.LeafAlloc))
		}
		fmt.Fprintf(cmd.Stdout, "\tBytes actually used for leaf data: %d (%d%%)\n", s.LeafInuse, percentage)

		fmt.Fprintln(cmd.Stdout, "Bucket statistics")
		fmt.Fprintf(cmd.Stdout, "\tTotal number of buckets: %d\n", s.BucketN)
		percentage = 0
		if s.BucketN != 0 {
			percentage = int(float32(s.InlineBucketN) * 100.0 / float32(s.BucketN))
		}
		fmt.Fprintf(cmd.Stdout, "\tTotal number on inlined buckets: %d (%d%%)\n", s.InlineBucketN, percentage)
		percentage = 0
		if s.LeafInuse != 0 {
			percentage = int(float32(s.InlineBucketInuse) * 100.0 / float32(s.LeafInuse))
		}
		fmt.Fprintf(cmd.Stdout, "\tBytes used for inlined buckets: %d (%d%%)\n", s.InlineBucketInuse, percentage)

		return nil
	})
}
开发者ID:rgeronimi,项目名称:bolt,代码行数:82,代码来源:main.go


注:本文中的github.com/boltdb/bolt.BucketStats类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。