本文整理汇总了Golang中github.com/boltdb/bolt.BucketStats类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
}
}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
})
}