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105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
package bstore
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// StatsKV represent operations on the underlying BoltDB key/value store.
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type StatsKV struct {
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Get uint
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Put uint // For Stats.Bucket, this counts calls of CreateBucket.
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Delete uint
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Cursor uint // Any cursor operation: Seek/First/Last/Next/Prev.
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}
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// Stats tracks DB/Tx/Query statistics, mostly counters.
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type Stats struct {
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// Number of read-only or writable transactions. Set for DB only.
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Reads uint
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Writes uint
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Bucket StatsKV // Use of buckets.
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Records StatsKV // Use of records bucket for types.
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Index StatsKV // Use of index buckets for types.
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// Operations that modify the database. Each record is counted, e.g.
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// for a query that updates/deletes multiple records.
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Get uint
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Insert uint
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Update uint
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Delete uint
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Queries uint // Total queries executed.
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PlanTableScan uint // Full table scans.
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PlanPK uint // Primary key get.
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PlanUnique uint // Full key Unique index get.
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PlanPKScan uint // Scan over primary keys.
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PlanIndexScan uint // Scan over index.
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Sort uint // In-memory collect and sort.
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LastType string // Last type queried.
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LastIndex string // Last index for LastType used for a query, or empty.
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LastOrdered bool // Whether last scan (PK or index) use was ordered, e.g. for sorting or because of a comparison filter.
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LastAsc bool // If ordered, whether last index scan was ascending.
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}
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func (skv *StatsKV) add(n StatsKV) {
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skv.Get += n.Get
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skv.Put += n.Put
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skv.Delete += n.Delete
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skv.Cursor += n.Cursor
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}
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func (skv *StatsKV) sub(n StatsKV) {
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skv.Get -= n.Get
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skv.Put -= n.Put
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skv.Delete -= n.Delete
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skv.Cursor -= n.Cursor
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}
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func (st *Stats) add(n Stats) {
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st.Reads += n.Reads
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st.Writes += n.Writes
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st.Bucket.add(n.Bucket)
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st.Records.add(n.Records)
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st.Index.add(n.Index)
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st.Get += n.Get
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st.Insert += n.Insert
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st.Update += n.Update
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st.Delete += n.Delete
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st.Queries += n.Queries
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st.PlanTableScan += n.PlanTableScan
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st.PlanPK += n.PlanPK
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st.PlanUnique += n.PlanUnique
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st.PlanPKScan += n.PlanPKScan
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st.PlanIndexScan += n.PlanIndexScan
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st.Sort += n.Sort
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st.LastType = n.LastType
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st.LastIndex = n.LastIndex
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st.LastOrdered = n.LastOrdered
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st.LastAsc = n.LastAsc
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}
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// Sub returns st with the counters from o subtracted.
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func (st Stats) Sub(o Stats) Stats {
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st.Reads -= o.Reads
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st.Writes -= o.Writes
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st.Bucket.sub(o.Bucket)
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st.Records.sub(o.Records)
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st.Index.sub(o.Index)
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st.Get -= o.Get
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st.Insert -= o.Insert
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st.Update -= o.Update
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st.Delete -= o.Delete
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st.Queries -= o.Queries
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st.PlanTableScan -= o.PlanTableScan
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st.PlanPK -= o.PlanPK
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st.PlanUnique -= o.PlanUnique
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st.PlanPKScan -= o.PlanPKScan
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st.PlanIndexScan -= o.PlanIndexScan
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st.Sort -= o.Sort
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return st
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}
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