mirror of https://github.com/etcd-io/bbolt.git
55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
package main
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import (
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"os"
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"github.com/boltdb/bolt"
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)
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// Keys retrieves a list of keys for a given bucket.
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func Stats(path, name string) {
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if _, err := os.Stat(path); os.IsNotExist(err) {
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fatal(err)
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return
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}
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db, err := bolt.Open(path, 0600)
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if err != nil {
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fatal(err)
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return
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}
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defer db.Close()
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err = db.View(func(tx *bolt.Tx) error {
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// Find bucket.
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b := tx.Bucket([]byte(name))
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if b == nil {
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fatalf("bucket not found: %s", name)
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return nil
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}
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// Iterate over each key.
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s := b.Stats()
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println("Page count statistics")
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printf("\tNumber of logical branch pages: %d\n", s.BranchPageN)
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printf("\tNumber of physical branch overflow pages: %d\n", s.BranchOverflowN)
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printf("\tNumber of logical leaf pages: %d\n", s.LeafPageN)
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printf("\tNumber of physical leaf overflow pages: %d\n", s.LeafOverflowN)
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println("Tree statistics")
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printf("\tNumber of keys/value pairs: %d\n", s.KeyN)
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printf("\tNumber of levels in B+tree: %d\n", s.Depth)
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println("Page size utilization")
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printf("\tBytes allocated for physical branch pages: %d\n", s.BranchAlloc)
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printf("\tBytes actually used for branch data: %d\n", s.BranchInuse)
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printf("\tBytes allocated for physical leaf pages: %d\n", s.LeafAlloc)
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printf("\tBytes actually used for leaf data: %d\n", s.LeafInuse)
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return nil
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})
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if err != nil {
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fatal(err)
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return
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}
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}
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