performance_schema/file_summary_by_instance/file_summary_by_instance_row.go

   1 // This file contains the library routines for managing the
   2 // file_summary_by_instance table.
   3 package file_summary_by_instance
   4
   5 import (
   6         "database/sql"
   7         "fmt"
   8         "log"
   9         "regexp"
  10         "sort"
  11
  12         "github.com/sjmudd/pstop/lib"
  13 )
  14
  15 /*
  16 CREATE TABLE `file_summary_by_instance` (
  17   `FILE_NAME` varchar(512) NOT NULL,
  18   `EVENT_NAME` varchar(128) NOT NULL,                           // not collected
  19   `OBJECT_INSTANCE_BEGIN` bigint(20) unsigned NOT NULL,         // not collected
  20   `COUNT_STAR` bigint(20) unsigned NOT NULL,
  21   `SUM_TIMER_WAIT` bigint(20) unsigned NOT NULL,
  22   `MIN_TIMER_WAIT` bigint(20) unsigned NOT NULL,
  23   `AVG_TIMER_WAIT` bigint(20) unsigned NOT NULL,
  24   `MAX_TIMER_WAIT` bigint(20) unsigned NOT NULL,
  25   `COUNT_READ` bigint(20) unsigned NOT NULL,
  26   `SUM_TIMER_READ` bigint(20) unsigned NOT NULL,
  27   `MIN_TIMER_READ` bigint(20) unsigned NOT NULL,
  28   `AVG_TIMER_READ` bigint(20) unsigned NOT NULL,
  29   `MAX_TIMER_READ` bigint(20) unsigned NOT NULL,
  30   `SUM_NUMBER_OF_BYTES_READ` bigint(20) NOT NULL,
  31   `COUNT_WRITE` bigint(20) unsigned NOT NULL,
  32   `SUM_TIMER_WRITE` bigint(20) unsigned NOT NULL,
  33   `MIN_TIMER_WRITE` bigint(20) unsigned NOT NULL,
  34   `AVG_TIMER_WRITE` bigint(20) unsigned NOT NULL,
  35   `MAX_TIMER_WRITE` bigint(20) unsigned NOT NULL,
  36   `SUM_NUMBER_OF_BYTES_WRITE` bigint(20) NOT NULL,
  37   `COUNT_MISC` bigint(20) unsigned NOT NULL,
  38   `SUM_TIMER_MISC` bigint(20) unsigned NOT NULL,
  39   `MIN_TIMER_MISC` bigint(20) unsigned NOT NULL,
  40   `AVG_TIMER_MISC` bigint(20) unsigned NOT NULL,
  41   `MAX_TIMER_MISC` bigint(20) unsigned NOT NULL
  42 ) ENGINE=PERFORMANCE_SCHEMA DEFAULT CHARSET=utf8
  43 1 row in set (0.00 sec)
  44 */
  45
  46 type file_summary_by_instance_row struct {
  47         FILE_NAME string
  48
  49         COUNT_STAR  int
  50         COUNT_READ  int
  51         COUNT_WRITE int
  52         COUNT_MISC  int
  53
  54         SUM_TIMER_WAIT  int
  55         SUM_TIMER_READ  int
  56         SUM_TIMER_WRITE int
  57         SUM_TIMER_MISC  int
  58
  59         SUM_NUMBER_OF_BYTES_READ  int
  60         SUM_NUMBER_OF_BYTES_WRITE int
  61 }
  62
  63 // represents a table or set of rows
  64 type file_summary_by_instance_rows []file_summary_by_instance_row
  65
  66 // Return the name using the FILE_NAME attribute.
  67 func (r *file_summary_by_instance_row) name() string {
  68         return r.FILE_NAME
  69 }
  70
  71 // Return a formatted pretty name for the row.
  72 func (r *file_summary_by_instance_row) pretty_name() string {
  73         s := r.name()
  74         if len(s) > 30 {
  75                 s = s[:29]
  76         }
  77         return fmt.Sprintf("%-30s", s)
  78 }
  79
  80 func (r *file_summary_by_instance_row) headings() string {
  81         return fmt.Sprintf("%-30s %10s %6s|%6s %6s %6s|%8s %8s|%8s %6s %6s %6s",
  82                 "Table Name",
  83                 "Latency",
  84                 "%",
  85                 "Read",
  86                 "Write",
  87                 "Misc",
  88                 "Rd bytes",
  89                 "Wr bytes",
  90                 "Ops",
  91                 "R Ops",
  92                 "W Ops",
  93                 "M Ops")
  94 }
  95
  96 // generate a printable result
  97 func (row *file_summary_by_instance_row) row_content(totals file_summary_by_instance_row) string {
  98         var name string
  99
 100         // We assume that if COUNT_STAR = 0 then there's no data at all...
 101         // when we have no data we really don't want to show the name either.
 102         if row.COUNT_STAR == 0 {
 103                 name = ""
 104         } else {
 105                 name = row.pretty_name()
 106         }
 107
 108         return fmt.Sprintf("%-30s %10s %6s|%6s %6s %6s|%8s %8s|%8s %6s %6s %6s",
 109                 name,
 110                 lib.FormatTime(row.SUM_TIMER_WAIT),
 111                 lib.FormatPct(lib.MyDivide(row.SUM_TIMER_WAIT, totals.SUM_TIMER_WAIT)),
 112                 lib.FormatPct(lib.MyDivide(row.SUM_TIMER_READ, row.SUM_TIMER_WAIT)),
 113                 lib.FormatPct(lib.MyDivide(row.SUM_TIMER_WRITE, row.SUM_TIMER_WAIT)),
 114                 lib.FormatPct(lib.MyDivide(row.SUM_TIMER_MISC, row.SUM_TIMER_WAIT)),
 115                 lib.FormatAmount(row.SUM_NUMBER_OF_BYTES_READ),
 116                 lib.FormatAmount(row.SUM_NUMBER_OF_BYTES_WRITE),
 117                 lib.FormatAmount(row.COUNT_STAR),
 118                 lib.FormatPct(lib.MyDivide(row.COUNT_READ, row.COUNT_STAR)),
 119                 lib.FormatPct(lib.MyDivide(row.COUNT_WRITE, row.COUNT_STAR)),
 120                 lib.FormatPct(lib.MyDivide(row.COUNT_MISC, row.COUNT_STAR)))
 121 }
 122
 123 func (this *file_summary_by_instance_row) add(other file_summary_by_instance_row) {
 124         this.COUNT_STAR += other.COUNT_STAR
 125         this.COUNT_READ += other.COUNT_READ
 126         this.COUNT_WRITE += other.COUNT_WRITE
 127         this.COUNT_MISC += other.COUNT_MISC
 128
 129         this.SUM_TIMER_WAIT += other.SUM_TIMER_WAIT
 130         this.SUM_TIMER_READ += other.SUM_TIMER_READ
 131         this.SUM_TIMER_WRITE += other.SUM_TIMER_WRITE
 132         this.SUM_TIMER_MISC += other.SUM_TIMER_MISC
 133
 134         this.SUM_NUMBER_OF_BYTES_READ += other.SUM_NUMBER_OF_BYTES_READ
 135         this.SUM_NUMBER_OF_BYTES_WRITE += other.SUM_NUMBER_OF_BYTES_WRITE
 136 }
 137
 138 func (this *file_summary_by_instance_row) subtract(other file_summary_by_instance_row) {
 139         this.COUNT_STAR -= other.COUNT_STAR
 140         this.COUNT_READ -= other.COUNT_READ
 141         this.COUNT_WRITE -= other.COUNT_WRITE
 142         this.COUNT_MISC -= other.COUNT_MISC
 143
 144         this.SUM_TIMER_WAIT -= other.SUM_TIMER_WAIT
 145         this.SUM_TIMER_READ -= other.SUM_TIMER_READ
 146         this.SUM_TIMER_WRITE -= other.SUM_TIMER_WRITE
 147         this.SUM_TIMER_MISC -= other.SUM_TIMER_MISC
 148
 149         this.SUM_NUMBER_OF_BYTES_READ -= other.SUM_NUMBER_OF_BYTES_READ
 150         this.SUM_NUMBER_OF_BYTES_WRITE -= other.SUM_NUMBER_OF_BYTES_WRITE
 151 }
 152
 153 // return the totals of a slice of rows
 154 func (t file_summary_by_instance_rows) totals() file_summary_by_instance_row {
 155         var totals file_summary_by_instance_row
 156         totals.FILE_NAME = "TOTALS"
 157
 158         for i := range t {
 159                 totals.add(t[i])
 160         }
 161
 162         return totals
 163 }
 164
 165 // clean up the given path reducing redundant stuff and return the clean path
 166 func cleanup_path(path string) string {
 167         //     foo/../bar --> bar       perl: $new =~ s{[^/]+/\.\./}{/};
 168         //     foo/./bar  --> foo/bar   perl: $new =~ s{/\./}{};
 169         //     //         --> /         perl: $new =~ s{//}{/};
 170         const (
 171                 double_slash_re        = `//`
 172                 slash_dot_slash_re     = `/\./`
 173                 slash_dot_dot_slash_re = `[^/]+/\.\./`
 174         )
 175         for {
 176                 orig_path := path
 177
 178                 r := regexp.MustCompile(double_slash_re)
 179                 path = r.ReplaceAllString(path, "")
 180                 r = regexp.MustCompile(slash_dot_slash_re)
 181                 path = r.ReplaceAllString(path, "")
 182                 r = regexp.MustCompile(slash_dot_dot_slash_re)
 183                 path = r.ReplaceAllString(path, "")
 184                 if orig_path == path { // no change so give up
 185                         break
 186                 }
 187         }
 188
 189         return path
 190 }
 191
 192 // From the original FILE_NAME we want to generate a simpler name to use.
 193 // This simpler name may also merge several different filenames into one.
 194 func (t file_summary_by_instance_row) simple_name(global_variables map[string]string) string {
 195         const (
 196                 auto_cnf_re  = `/auto\.cnf$`
 197                 binlog_re    = `/binlog\.(\d{6}|index)$`
 198                 charset_re   = `/share/charsets/Index\.xml$`
 199                 db_opt_re    = `/db\.opt$`
 200                 error_msg_re = `/share/[^/]+/errmsg\.sys$`
 201                 ibdata_re    = `/ibdata\d+$`
 202                 redo_log_re  = `/ib_logfile\d+$`
 203                 pid_file_re  = `/[^/]+\.pid$`
 204                 //              relay_log_re  = `/mysql-relay-bin.(\d{6}|index)$`
 205                 relative_path_re = `^\.\./`
 206                 current_dir_re   = `^\./`
 207                 slowlog_re       = `/slowlog$`
 208                 table_file_re    = `/([^/]+)/([^/]+)\.(frm|ibd|MYD|MYI|CSM|CSV|par)$`
 209                 temp_table_re    = `#sql-[0-9_]+`
 210                 part_table_re    = `(.+)#P#p\d+`
 211         )
 212
 213         path := t.FILE_NAME
 214
 215         // this should probably be ordered from most expected regexp to least
 216         re := regexp.MustCompile(table_file_re)
 217         if m1 := re.FindStringSubmatch(path); m1 != nil {
 218                 // we may match temporary tables so check for them
 219                 re2 := regexp.MustCompile(temp_table_re)
 220                 if m2 := re2.FindStringSubmatch(m1[2]); m2 != nil {
 221                         return "<temp_table>"
 222                 }
 223
 224                 // we may match partitioned tables so check for them
 225                 re3 := regexp.MustCompile(part_table_re)
 226                 if m3 := re3.FindStringSubmatch(m1[2]); m3 != nil {
 227                         return m1[1] + "." + m3[1] // <schema>.<table> (less partition info)
 228                 }
 229
 230                 return m1[1] + "." + m1[2] // <schema>.<table>
 231         }
 232         if regexp.MustCompile(ibdata_re).MatchString(path) == true {
 233                 return "<ibdata>"
 234         }
 235         if regexp.MustCompile(redo_log_re).MatchString(path) == true {
 236                 return "<redo_log>"
 237         }
 238         if regexp.MustCompile(binlog_re).MatchString(path) == true {
 239                 return "<binlog>"
 240         }
 241         if regexp.MustCompile(db_opt_re).MatchString(path) == true {
 242                 return "<db_opt>"
 243         }
 244         if regexp.MustCompile(slowlog_re).MatchString(path) == true {
 245                 return "<slow_log>"
 246         }
 247         if regexp.MustCompile(auto_cnf_re).MatchString(path) == true {
 248                 return "<auto_cnf>"
 249         }
 250         // relay logs are a bit complicated. If a full path then easy to
 251         // identify,but if a relative path we may need to add $datadir,
 252         // but also if as I do we have a ../blah/somewhere/path then we
 253         // need to make it match too.
 254         if len(global_variables["relay_log"]) > 0 {
 255                 relay_log := global_variables["relay_log"]
 256                 if relay_log[0] != '/' { // relative path
 257                         relay_log = cleanup_path(global_variables["datadir"] + relay_log) // datadir always ends in /
 258                 }
 259                 relay_log_re := relay_log + `\.(\d{6}|index)$`
 260                 if regexp.MustCompile(relay_log_re).MatchString(path) == true {
 261                         return "<relay_log>"
 262                 }
 263         }
 264         if regexp.MustCompile(pid_file_re).MatchString(path) == true {
 265                 return "<pid_file>"
 266         }
 267         if regexp.MustCompile(error_msg_re).MatchString(path) == true {
 268                 return "<errmsg>"
 269         }
 270         if regexp.MustCompile(charset_re).MatchString(path) == true {
 271                 return "<charset>"
 272         }
 273         return path
 274 }
 275
 276 // Convert the imported "table" to a merged one with merged data.
 277 // Combine all entries with the same "FILE_NAME" by adding their values.
 278 func merge_by_table_name(orig file_summary_by_instance_rows, global_variables map[string]string) file_summary_by_instance_rows {
 279         t := make(file_summary_by_instance_rows, 0, len(orig))
 280
 281         m := make(map[string]file_summary_by_instance_row)
 282
 283         // iterate over source table
 284         for i := range orig {
 285                 var file_name string
 286                 var new_row file_summary_by_instance_row
 287                 orig_row := orig[i]
 288
 289                 if orig_row.COUNT_STAR > 0 {
 290                         file_name = orig_row.simple_name(global_variables)
 291
 292                         // check if we have an entry in the map
 293                         if _, found := m[file_name]; found {
 294                                 new_row = m[file_name]
 295                         } else {
 296                                 new_row.FILE_NAME = file_name
 297                         }
 298                         new_row.add(orig_row)
 299                         m[file_name] = new_row // update the map with the new value
 300                 }
 301         }
 302
 303         // add the map contents back into the table
 304         for _, row := range m {
 305                 t = append(t, row)
 306         }
 307
 308         return t
 309 }
 310
 311 // Select the raw data from the database into file_summary_by_instance_rows
 312 // - filter out empty values
 313 // - merge rows with the same name into a single row
 314 // - change FILE_NAME into a more descriptive value.
 315 func select_fsbi_rows(dbh *sql.DB) file_summary_by_instance_rows {
 316         var t file_summary_by_instance_rows
 317
 318         sql := "SELECT FILE_NAME, COUNT_STAR, SUM_TIMER_WAIT, COUNT_READ, SUM_TIMER_READ, SUM_NUMBER_OF_BYTES_READ, COUNT_WRITE, SUM_TIMER_WRITE, SUM_NUMBER_OF_BYTES_WRITE, COUNT_MISC, SUM_TIMER_MISC FROM file_summary_by_instance"
 319
 320         rows, err := dbh.Query(sql)
 321         if err != nil {
 322                 log.Fatal(err)
 323         }
 324         defer rows.Close()
 325
 326         for rows.Next() {
 327                 var r file_summary_by_instance_row
 328
 329                 if err := rows.Scan(&r.FILE_NAME, &r.COUNT_STAR, &r.SUM_TIMER_WAIT, &r.COUNT_READ, &r.SUM_TIMER_READ, &r.SUM_NUMBER_OF_BYTES_READ, &r.COUNT_WRITE, &r.SUM_TIMER_WRITE, &r.SUM_NUMBER_OF_BYTES_WRITE, &r.COUNT_MISC, &r.SUM_TIMER_MISC); err != nil {
 330                         log.Fatal(err)
 331                 }
 332                 t = append(t, r)
 333         }
 334         if err := rows.Err(); err != nil {
 335                 log.Fatal(err)
 336         }
 337
 338         return t
 339 }
 340
 341 // remove the initial values from those rows where there's a match
 342 // - if we find a row we can't match ignore it
 343 func (this *file_summary_by_instance_rows) subtract(initial file_summary_by_instance_rows) {
 344         i_by_name := make(map[string]int)
 345
 346         // iterate over rows by name
 347         for i := range initial {
 348                 i_by_name[initial[i].name()] = i
 349         }
 350
 351         for i := range *this {
 352                 if _, ok := i_by_name[(*this)[i].name()]; ok {
 353                         initial_i := i_by_name[(*this)[i].name()]
 354                         (*this)[i].subtract(initial[initial_i])
 355                 }
 356         }
 357 }
 358
 359 func (t file_summary_by_instance_rows) Len() int      { return len(t) }
 360 func (t file_summary_by_instance_rows) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
 361 func (t file_summary_by_instance_rows) Less(i, j int) bool {
 362         return (t[i].SUM_TIMER_WAIT > t[j].SUM_TIMER_WAIT) ||
 363                 ((t[i].SUM_TIMER_WAIT == t[j].SUM_TIMER_WAIT) && (t[i].FILE_NAME < t[j].FILE_NAME))
 364 }
 365
 366 func (t *file_summary_by_instance_rows) sort() {
 367         sort.Sort(t)
 368 }
 369
 370 // if the data in t2 is "newer", "has more values" than t then it needs refreshing.
 371 // check this by comparing totals.
 372 func (t file_summary_by_instance_rows) needs_refresh(t2 file_summary_by_instance_rows) bool {
 373         my_totals := t.totals()
 374         t2_totals := t2.totals()
 375
 376         return my_totals.SUM_TIMER_WAIT > t2_totals.SUM_TIMER_WAIT
 377 }