--- /dev/null
+// This file contains the library routines for managing the
+// table_io_waits_by_table table.
+package table_io_waits_summary_by_table
+
+import (
+ "database/sql"
+ "fmt"
+ "log"
+ "sort"
+ "strings"
+
+ "github.com/sjmudd/pstop/lib"
+)
+
+// a row from performance_schema.table_io_waits_summary_by_table
+type table_io_waits_summary_by_table_row struct {
+ // Note: upper case names to match the performance_schema column names
+ // This type is _not_ exported.
+
+ OBJECT_TYPE string // in theory redundant but keep anyway
+ OBJECT_SCHEMA string // in theory redundant but keep anyway
+ OBJECT_NAME string // in theory redundant but keep anyway
+
+ SUM_TIMER_WAIT uint64
+ SUM_TIMER_READ uint64
+ SUM_TIMER_WRITE uint64
+ SUM_TIMER_FETCH uint64
+ SUM_TIMER_INSERT uint64
+ SUM_TIMER_UPDATE uint64
+ SUM_TIMER_DELETE uint64
+
+ COUNT_STAR uint64
+ COUNT_READ uint64
+ COUNT_WRITE uint64
+ COUNT_FETCH uint64
+ COUNT_INSERT uint64
+ COUNT_UPDATE uint64
+ COUNT_DELETE uint64
+}
+type table_io_waits_summary_by_table_rows []table_io_waits_summary_by_table_row
+
+// // return the table name from the columns as '<schema>.<table>'
+func (r *table_io_waits_summary_by_table_row) name() string {
+ var n string
+ if len(r.OBJECT_SCHEMA) > 0 {
+ n += r.OBJECT_SCHEMA
+ }
+ if len(n) > 0 {
+ if len(r.OBJECT_NAME) > 0 {
+ n += "." + r.OBJECT_NAME
+ }
+ } else {
+ if len(r.OBJECT_NAME) > 0 {
+ n += r.OBJECT_NAME
+ }
+ }
+ return n
+}
+
+func (r *table_io_waits_summary_by_table_row) pretty_name() string {
+ s := r.name()
+ if len(s) > 30 {
+ s = s[:29]
+ }
+ return fmt.Sprintf("%-30s", s)
+}
+
+func (r *table_io_waits_summary_by_table_row) latency_headings() string {
+ return fmt.Sprintf("%-30s %10s %6s|%6s %6s %6s %6s", "Table Name", "Latency", "%", "Fetch", "Insert", "Update", "Delete")
+}
+func (r *table_io_waits_summary_by_table_row) ops_headings() string {
+ return fmt.Sprintf("%-30s %10s %6s|%6s %6s %6s %6s", "Table Name", "Ops", "%", "Fetch", "Insert", "Update", "Delete")
+}
+
+// generate a printable result
+func (r *table_io_waits_summary_by_table_row) latency_row_content(totals table_io_waits_summary_by_table_row) string {
+ // assume the data is empty so hide it.
+ name := r.pretty_name()
+ if r.COUNT_STAR == 0 {
+ name = ""
+ }
+
+ return fmt.Sprintf("%-30s %10s %6s|%6s %6s %6s %6s",
+ name,
+ lib.FormatTime(r.SUM_TIMER_WAIT),
+ lib.FormatPct(lib.MyDivide(r.SUM_TIMER_WAIT, totals.SUM_TIMER_WAIT)),
+ lib.FormatPct(lib.MyDivide(r.SUM_TIMER_FETCH, r.SUM_TIMER_WAIT)),
+ lib.FormatPct(lib.MyDivide(r.SUM_TIMER_INSERT, r.SUM_TIMER_WAIT)),
+ lib.FormatPct(lib.MyDivide(r.SUM_TIMER_UPDATE, r.SUM_TIMER_WAIT)),
+ lib.FormatPct(lib.MyDivide(r.SUM_TIMER_DELETE, r.SUM_TIMER_WAIT)))
+}
+
+// generate a printable result for ops
+func (r *table_io_waits_summary_by_table_row) ops_row_content(totals table_io_waits_summary_by_table_row) string {
+ // assume the data is empty so hide it.
+ name := r.pretty_name()
+ if r.COUNT_STAR == 0 {
+ name = ""
+ }
+
+ return fmt.Sprintf("%-30s %10s %6s|%6s %6s %6s %6s",
+ name,
+ lib.FormatAmount(r.COUNT_STAR),
+ lib.FormatPct(lib.MyDivide(r.COUNT_STAR, totals.COUNT_STAR)),
+ lib.FormatPct(lib.MyDivide(r.COUNT_FETCH, r.COUNT_STAR)),
+ lib.FormatPct(lib.MyDivide(r.COUNT_INSERT, r.COUNT_STAR)),
+ lib.FormatPct(lib.MyDivide(r.COUNT_UPDATE, r.COUNT_STAR)),
+ lib.FormatPct(lib.MyDivide(r.COUNT_DELETE, r.COUNT_STAR)))
+}
+
+func (this *table_io_waits_summary_by_table_row) add(other table_io_waits_summary_by_table_row) {
+ this.SUM_TIMER_WAIT += other.SUM_TIMER_WAIT
+ this.SUM_TIMER_FETCH += other.SUM_TIMER_FETCH
+ this.SUM_TIMER_INSERT += other.SUM_TIMER_INSERT
+ this.SUM_TIMER_UPDATE += other.SUM_TIMER_UPDATE
+ this.SUM_TIMER_DELETE += other.SUM_TIMER_DELETE
+ this.SUM_TIMER_READ += other.SUM_TIMER_READ
+ this.SUM_TIMER_WRITE += other.SUM_TIMER_WRITE
+
+ this.COUNT_STAR += other.COUNT_STAR
+ this.COUNT_FETCH += other.COUNT_FETCH
+ this.COUNT_INSERT += other.COUNT_INSERT
+ this.COUNT_UPDATE += other.COUNT_UPDATE
+ this.COUNT_DELETE += other.COUNT_DELETE
+ this.COUNT_READ += other.COUNT_READ
+ this.COUNT_WRITE += other.COUNT_WRITE
+}
+
+// subtract the countable values in one row from another
+func (this *table_io_waits_summary_by_table_row) subtract(other table_io_waits_summary_by_table_row) {
+ // check for issues here (we have a bug) and log it
+ // - this situation should not happen so there's a logic bug somewhere else
+ if this.SUM_TIMER_WAIT >= other.SUM_TIMER_WAIT {
+ this.SUM_TIMER_WAIT -= other.SUM_TIMER_WAIT
+ this.SUM_TIMER_FETCH -= other.SUM_TIMER_FETCH
+ this.SUM_TIMER_INSERT -= other.SUM_TIMER_INSERT
+ this.SUM_TIMER_UPDATE -= other.SUM_TIMER_UPDATE
+ this.SUM_TIMER_DELETE -= other.SUM_TIMER_DELETE
+ this.SUM_TIMER_READ -= other.SUM_TIMER_READ
+ this.SUM_TIMER_WRITE -= other.SUM_TIMER_WRITE
+
+ this.COUNT_STAR -= other.COUNT_STAR
+ this.COUNT_FETCH -= other.COUNT_FETCH
+ this.COUNT_INSERT -= other.COUNT_INSERT
+ this.COUNT_UPDATE -= other.COUNT_UPDATE
+ this.COUNT_DELETE -= other.COUNT_DELETE
+ this.COUNT_READ -= other.COUNT_READ
+ this.COUNT_WRITE -= other.COUNT_WRITE
+ } else {
+ lib.Logger.Println("WARNING: table_io_waits_summary_by_table_row.subtract() - subtraction problem! (not subtracting)")
+ lib.Logger.Println("this=", this)
+ lib.Logger.Println("other=", other)
+ }
+}
+
+func (t table_io_waits_summary_by_table_rows) totals() table_io_waits_summary_by_table_row {
+ var totals table_io_waits_summary_by_table_row
+ totals.OBJECT_SCHEMA = "TOTALS"
+
+ for i := range t {
+ totals.add(t[i])
+ }
+
+ return totals
+}
+
+func select_tiwsbt_rows(dbh *sql.DB) table_io_waits_summary_by_table_rows {
+ var t table_io_waits_summary_by_table_rows
+
+ // we collect all information even if it's mainly empty as we may reference it later
+ sql := "SELECT OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COUNT_STAR, SUM_TIMER_WAIT, COUNT_READ, SUM_TIMER_READ, COUNT_WRITE, SUM_TIMER_WRITE, COUNT_FETCH, SUM_TIMER_FETCH, COUNT_INSERT, SUM_TIMER_INSERT, COUNT_UPDATE, SUM_TIMER_UPDATE, COUNT_DELETE, SUM_TIMER_DELETE FROM table_io_waits_summary_by_table WHERE SUM_TIMER_WAIT > 0"
+
+ rows, err := dbh.Query(sql)
+ if err != nil {
+ log.Fatal(err)
+ }
+ defer rows.Close()
+
+ for rows.Next() {
+ var r table_io_waits_summary_by_table_row
+ if err := rows.Scan(
+ &r.OBJECT_TYPE,
+ &r.OBJECT_SCHEMA,
+ &r.OBJECT_NAME,
+ &r.COUNT_STAR,
+ &r.SUM_TIMER_WAIT,
+ &r.COUNT_READ,
+ &r.SUM_TIMER_READ,
+ &r.COUNT_WRITE,
+ &r.SUM_TIMER_WRITE,
+ &r.COUNT_FETCH,
+ &r.SUM_TIMER_FETCH,
+ &r.COUNT_INSERT,
+ &r.SUM_TIMER_INSERT,
+ &r.COUNT_UPDATE,
+ &r.SUM_TIMER_UPDATE,
+ &r.COUNT_DELETE,
+ &r.SUM_TIMER_DELETE); err != nil {
+ log.Fatal(err)
+ }
+ // we collect all information even if it's mainly empty as we may reference it later
+ t = append(t, r)
+ }
+ if err := rows.Err(); err != nil {
+ log.Fatal(err)
+ }
+
+ return t
+}
+
+func (t table_io_waits_summary_by_table_rows) Len() int { return len(t) }
+func (t table_io_waits_summary_by_table_rows) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
+
+// sort by value (descending) but also by "name" (ascending) if the values are the same
+func (t table_io_waits_summary_by_table_rows) Less(i, j int) bool {
+ return (t[i].SUM_TIMER_WAIT > t[j].SUM_TIMER_WAIT) ||
+ ((t[i].SUM_TIMER_WAIT == t[j].SUM_TIMER_WAIT) &&
+ (t[i].OBJECT_SCHEMA < t[j].OBJECT_SCHEMA) &&
+ (t[i].OBJECT_NAME < t[j].OBJECT_NAME))
+}
+
+// for sorting
+type ByOps table_io_waits_summary_by_table_rows
+
+func (t ByOps) Len() int { return len(t) }
+func (t ByOps) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
+func (t ByOps) Less(i, j int) bool {
+ return (t[i].COUNT_STAR > t[j].COUNT_STAR) ||
+ ((t[i].SUM_TIMER_WAIT == t[j].SUM_TIMER_WAIT) &&
+ (t[i].OBJECT_SCHEMA < t[j].OBJECT_SCHEMA) &&
+ (t[i].OBJECT_NAME < t[j].OBJECT_NAME))
+}
+
+func (t table_io_waits_summary_by_table_rows) Sort(want_latency bool) {
+ if want_latency {
+ sort.Sort(t)
+ } else {
+ sort.Sort(ByOps(t))
+ }
+}
+
+// remove the initial values from those rows where there's a match
+// - if we find a row we can't match ignore it
+func (this *table_io_waits_summary_by_table_rows) subtract(initial table_io_waits_summary_by_table_rows) {
+ initial_by_name := make(map[string]int)
+
+ // iterate over rows by name
+ for i := range initial {
+ initial_by_name[initial[i].name()] = i
+ }
+
+ for i := range *this {
+ this_name := (*this)[i].name()
+ if _, ok := initial_by_name[this_name]; ok {
+ initial_index := initial_by_name[this_name]
+ (*this)[i].subtract(initial[initial_index])
+ }
+ }
+}
+
+// if the data in t2 is "newer", "has more values" than t then it needs refreshing.
+// check this by comparing totals.
+func (t table_io_waits_summary_by_table_rows) needs_refresh(t2 table_io_waits_summary_by_table_rows) bool {
+ my_totals := t.totals()
+ t2_totals := t2.totals()
+
+ return my_totals.SUM_TIMER_WAIT > t2_totals.SUM_TIMER_WAIT
+}
+
+// describe a whole row
+func (r table_io_waits_summary_by_table_row) String() string {
+ return fmt.Sprintf("%-30s|%10s %10s %10s %10s %10s|%10s %10s|%10s %10s %10s %10s %10s|%10s %10s",
+ r.pretty_name(),
+ lib.FormatTime(r.SUM_TIMER_WAIT),
+ lib.FormatTime(r.SUM_TIMER_FETCH),
+ lib.FormatTime(r.SUM_TIMER_INSERT),
+ lib.FormatTime(r.SUM_TIMER_UPDATE),
+ lib.FormatTime(r.SUM_TIMER_DELETE),
+
+ lib.FormatTime(r.SUM_TIMER_READ),
+ lib.FormatTime(r.SUM_TIMER_WRITE),
+
+ lib.FormatAmount(r.COUNT_STAR),
+ lib.FormatAmount(r.COUNT_FETCH),
+ lib.FormatAmount(r.COUNT_INSERT),
+ lib.FormatAmount(r.COUNT_UPDATE),
+ lib.FormatAmount(r.COUNT_DELETE),
+
+ lib.FormatAmount(r.COUNT_READ),
+ lib.FormatAmount(r.COUNT_WRITE))
+}
+
+// describe a whole table
+func (t table_io_waits_summary_by_table_rows) String() string {
+ s := make([]string, len(t))
+
+ for i := range t {
+ s = append(s, t[i].String())
+ }
+
+ return strings.Join(s, "\n")
+}
git://git.iain.cx/iain / pstop.git / blobdiff