src/mysql.c

   1 /**
   2  * collectd - src/mysql.c
   3  * Copyright (C) 2006-2010  Florian octo Forster
   4  * Copyright (C) 2008       Mirko Buffoni
   5  * Copyright (C) 2009       Doug MacEachern
   6  * Copyright (C) 2009       Sebastian tokkee Harl
   7  * Copyright (C) 2009       Rodolphe Quiédeville
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; only version 2 of the License is applicable.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21  *
  22  * Authors:
  23  *   Florian octo Forster <octo at collectd.org>
  24  *   Mirko Buffoni <briareos at eswat.org>
  25  *   Doug MacEachern <dougm at hyperic.com>
  26  *   Sebastian tokkee Harl <sh at tokkee.org>
  27  *   Rodolphe Quiédeville <rquiedeville at bearstech.com>
  28  **/
  29
  30 #include "collectd.h"
  31 #include "common.h"
  32 #include "plugin.h"
  33 #include "configfile.h"
  34
  35 #ifdef HAVE_MYSQL_H
  36 #include <mysql.h>
  37 #elif defined(HAVE_MYSQL_MYSQL_H)
  38 #include <mysql/mysql.h>
  39 #endif
  40
  41 /* TODO: Understand `Select_*' and possibly do that stuff as well.. */
  42
  43 struct mysql_database_s /* {{{ */
  44 {
  45         char *instance;
  46         char *alias;
  47         char *host;
  48         char *user;
  49         char *pass;
  50         char *database;
  51         char *socket;
  52         int   port;
  53         int   timeout;
  54
  55         _Bool master_stats;
  56         _Bool slave_stats;
  57         _Bool innodb_stats;
  58
  59         _Bool slave_notif;
  60         _Bool slave_io_running;
  61         _Bool slave_sql_running;
  62
  63         MYSQL *con;
  64         _Bool  is_connected;
  65 };
  66 typedef struct mysql_database_s mysql_database_t; /* }}} */
  67
  68 static int mysql_read (user_data_t *ud);
  69
  70 void mysql_read_default_options(struct st_mysql_options *options,
  71                 const char *filename,const char *group);
  72
  73 static void mysql_database_free (void *arg) /* {{{ */
  74 {
  75         mysql_database_t *db;
  76
  77         DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
  78
  79         db = (mysql_database_t *) arg;
  80
  81         if (db == NULL)
  82                 return;
  83
  84         if (db->con != NULL)
  85                 mysql_close (db->con);
  86
  87         sfree (db->alias);
  88         sfree (db->host);
  89         sfree (db->user);
  90         sfree (db->pass);
  91         sfree (db->socket);
  92         sfree (db->instance);
  93         sfree (db->database);
  94         sfree (db);
  95 } /* }}} void mysql_database_free */
  96
  97 /* Configuration handling functions {{{
  98  *
  99  * <Plugin mysql>
 100  *   <Database "plugin_instance1">
 101  *     Host "localhost"
 102  *     Port 22000
 103  *     ...
 104  *   </Database>
 105  * </Plugin>
 106  */
 107 static int mysql_config_database (oconfig_item_t *ci) /* {{{ */
 108 {
 109         mysql_database_t *db;
 110         int status = 0;
 111         int i;
 112
 113         if ((ci->values_num != 1)
 114             || (ci->values[0].type != OCONFIG_TYPE_STRING))
 115         {
 116                 WARNING ("mysql plugin: The `Database' block "
 117                          "needs exactly one string argument.");
 118                 return (-1);
 119         }
 120
 121         db = (mysql_database_t *) malloc (sizeof (*db));
 122         if (db == NULL)
 123         {
 124                 ERROR ("mysql plugin: malloc failed.");
 125                 return (-1);
 126         }
 127         memset (db, 0, sizeof (*db));
 128
 129         /* initialize all the pointers */
 130         db->alias    = NULL;
 131         db->host     = NULL;
 132         db->user     = NULL;
 133         db->pass     = NULL;
 134         db->database = NULL;
 135         db->socket   = NULL;
 136         db->con      = NULL;
 137         db->timeout  = 0;
 138
 139         /* trigger a notification, if it's not running */
 140         db->slave_io_running  = 1;
 141         db->slave_sql_running = 1;
 142
 143         status = cf_util_get_string (ci, &db->instance);
 144         if (status != 0)
 145         {
 146                 sfree (db);
 147                 return (status);
 148         }
 149         assert (db->instance != NULL);
 150
 151         /* Fill the `mysql_database_t' structure.. */
 152         for (i = 0; i < ci->children_num; i++)
 153         {
 154                 oconfig_item_t *child = ci->children + i;
 155
 156                 if (strcasecmp ("Alias", child->key) == 0)
 157                         status = cf_util_get_string (child, &db->alias);
 158                 else if (strcasecmp ("Host", child->key) == 0)
 159                         status = cf_util_get_string (child, &db->host);
 160                 else if (strcasecmp ("User", child->key) == 0)
 161                         status = cf_util_get_string (child, &db->user);
 162                 else if (strcasecmp ("Password", child->key) == 0)
 163                         status = cf_util_get_string (child, &db->pass);
 164                 else if (strcasecmp ("Port", child->key) == 0)
 165                 {
 166                         status = cf_util_get_port_number (child);
 167                         if (status > 0)
 168                         {
 169                                 db->port = status;
 170                                 status = 0;
 171                         }
 172                 }
 173                 else if (strcasecmp ("Socket", child->key) == 0)
 174                         status = cf_util_get_string (child, &db->socket);
 175                 else if (strcasecmp ("Database", child->key) == 0)
 176                         status = cf_util_get_string (child, &db->database);
 177                 else if (strcasecmp ("ConnectTimeout", child->key) == 0)
 178                         status = cf_util_get_int (child, &db->timeout);
 179                 else if (strcasecmp ("MasterStats", child->key) == 0)
 180                         status = cf_util_get_boolean (child, &db->master_stats);
 181                 else if (strcasecmp ("SlaveStats", child->key) == 0)
 182                         status = cf_util_get_boolean (child, &db->slave_stats);
 183                 else if (strcasecmp ("SlaveNotifications", child->key) == 0)
 184                         status = cf_util_get_boolean (child, &db->slave_notif);
 185                 else if (strcasecmp ("InnodbStats", child->key) == 0)
 186                         status = cf_util_get_boolean (child, &db->innodb_stats);
 187                 else
 188                 {
 189                         WARNING ("mysql plugin: Option `%s' not allowed here.", child->key);
 190                         status = -1;
 191                 }
 192
 193                 if (status != 0)
 194                         break;
 195         }
 196
 197         /* If all went well, register this database for reading */
 198         if (status == 0)
 199         {
 200                 user_data_t ud;
 201                 char cb_name[DATA_MAX_NAME_LEN];
 202
 203                 DEBUG ("mysql plugin: Registering new read callback: %s",
 204                                 (db->database != NULL) ? db->database : "<default>");
 205
 206                 memset (&ud, 0, sizeof (ud));
 207                 ud.data = (void *) db;
 208                 ud.free_func = mysql_database_free;
 209
 210                 if (db->instance != NULL)
 211                         ssnprintf (cb_name, sizeof (cb_name), "mysql-%s",
 212                                         db->instance);
 213                 else
 214                         sstrncpy (cb_name, "mysql", sizeof (cb_name));
 215
 216                 plugin_register_complex_read (/* group = */ NULL, cb_name,
 217                                               mysql_read,
 218                                               /* interval = */ NULL, &ud);
 219         }
 220         else
 221         {
 222                 mysql_database_free (db);
 223                 return (-1);
 224         }
 225
 226         return (0);
 227 } /* }}} int mysql_config_database */
 228
 229 static int mysql_config (oconfig_item_t *ci) /* {{{ */
 230 {
 231         int i;
 232
 233         if (ci == NULL)
 234                 return (EINVAL);
 235
 236         /* Fill the `mysql_database_t' structure.. */
 237         for (i = 0; i < ci->children_num; i++)
 238         {
 239                 oconfig_item_t *child = ci->children + i;
 240
 241                 if (strcasecmp ("Database", child->key) == 0)
 242                         mysql_config_database (child);
 243                 else
 244                         WARNING ("mysql plugin: Option \"%s\" not allowed here.",
 245                                         child->key);
 246         }
 247
 248         return (0);
 249 } /* }}} int mysql_config */
 250
 251 /* }}} End of configuration handling functions */
 252
 253 static MYSQL *getconnection (mysql_database_t *db)
 254 {
 255         if (db->is_connected)
 256         {
 257                 int status;
 258
 259                 status = mysql_ping (db->con);
 260                 if (status == 0)
 261                         return (db->con);
 262
 263                 WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
 264                                 db->instance, mysql_error (db->con));
 265         }
 266         db->is_connected = 0;
 267
 268         if (db->con == NULL)
 269         {
 270                 db->con = mysql_init (NULL);
 271                 if (db->con == NULL)
 272                 {
 273                         ERROR ("mysql plugin: mysql_init failed: %s",
 274                                         mysql_error (db->con));
 275                         return (NULL);
 276                 }
 277         }
 278
 279         /* Configure TCP connect timeout (default: 0) */
 280         db->con->options.connect_timeout = db->timeout;
 281
 282         if (mysql_real_connect (db->con, db->host, db->user, db->pass,
 283                                 db->database, db->port, db->socket, 0) == NULL)
 284         {
 285                 ERROR ("mysql plugin: Failed to connect to database %s "
 286                                 "at server %s: %s",
 287                                 (db->database != NULL) ? db->database : "<none>",
 288                                 (db->host != NULL) ? db->host : "localhost",
 289                                 mysql_error (db->con));
 290                 return (NULL);
 291         }
 292
 293         INFO ("mysql plugin: Successfully connected to database %s "
 294                         "at server %s (server version: %s, protocol version: %d)",
 295                         (db->database != NULL) ? db->database : "<none>",
 296                         mysql_get_host_info (db->con),
 297                         mysql_get_server_info (db->con),
 298                         mysql_get_proto_info (db->con));
 299
 300         db->is_connected = 1;
 301         return (db->con);
 302 } /* static MYSQL *getconnection (mysql_database_t *db) */
 303
 304 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
 305 {
 306         if (db->alias)
 307                 sstrncpy (buf, db->alias, buflen);
 308         else if ((db->host == NULL)
 309                         || (strcmp ("", db->host) == 0)
 310                         || (strcmp ("127.0.0.1", db->host) == 0)
 311                         || (strcmp ("localhost", db->host) == 0))
 312                 sstrncpy (buf, hostname_g, buflen);
 313         else
 314                 sstrncpy (buf, db->host, buflen);
 315 } /* void set_host */
 316
 317 static void submit (const char *type, const char *type_instance,
 318                 value_t *values, size_t values_len, mysql_database_t *db)
 319 {
 320         value_list_t vl = VALUE_LIST_INIT;
 321
 322         vl.values     = values;
 323         vl.values_len = values_len;
 324
 325         set_host (db, vl.host, sizeof (vl.host));
 326
 327         sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
 328
 329         /* Assured by "mysql_config_database" */
 330         assert (db->instance != NULL);
 331         sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
 332
 333         sstrncpy (vl.type, type, sizeof (vl.type));
 334         if (type_instance != NULL)
 335                 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 336
 337         plugin_dispatch_values (&vl);
 338 } /* submit */
 339
 340 static void counter_submit (const char *type, const char *type_instance,
 341                 derive_t value, mysql_database_t *db)
 342 {
 343         value_t values[1];
 344
 345         values[0].derive = value;
 346         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 347 } /* void counter_submit */
 348
 349 static void gauge_submit (const char *type, const char *type_instance,
 350                 gauge_t value, mysql_database_t *db)
 351 {
 352         value_t values[1];
 353
 354         values[0].gauge = value;
 355         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 356 } /* void gauge_submit */
 357
 358 static void derive_submit (const char *type, const char *type_instance,
 359                 derive_t value, mysql_database_t *db)
 360 {
 361         value_t values[1];
 362
 363         values[0].derive = value;
 364         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 365 } /* void derive_submit */
 366
 367 static void traffic_submit (derive_t rx, derive_t tx, mysql_database_t *db)
 368 {
 369         value_t values[2];
 370
 371         values[0].derive = rx;
 372         values[1].derive = tx;
 373
 374         submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
 375 } /* void traffic_submit */
 376
 377 static MYSQL_RES *exec_query (MYSQL *con, const char *query)
 378 {
 379         MYSQL_RES *res;
 380
 381         int query_len = strlen (query);
 382
 383         if (mysql_real_query (con, query, query_len))
 384         {
 385                 ERROR ("mysql plugin: Failed to execute query: %s",
 386                                 mysql_error (con));
 387                 INFO ("mysql plugin: SQL query was: %s", query);
 388                 return (NULL);
 389         }
 390
 391         res = mysql_store_result (con);
 392         if (res == NULL)
 393         {
 394                 ERROR ("mysql plugin: Failed to store query result: %s",
 395                                 mysql_error (con));
 396                 INFO ("mysql plugin: SQL query was: %s", query);
 397                 return (NULL);
 398         }
 399
 400         return (res);
 401 } /* exec_query */
 402
 403 static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
 404 {
 405         MYSQL_RES *res;
 406         MYSQL_ROW  row;
 407
 408         char *query;
 409         int   field_num;
 410         unsigned long long position;
 411
 412         query = "SHOW MASTER STATUS";
 413
 414         res = exec_query (con, query);
 415         if (res == NULL)
 416                 return (-1);
 417
 418         row = mysql_fetch_row (res);
 419         if (row == NULL)
 420         {
 421                 ERROR ("mysql plugin: Failed to get master statistics: "
 422                                 "`%s' did not return any rows.", query);
 423                 mysql_free_result (res);
 424                 return (-1);
 425         }
 426
 427         field_num = mysql_num_fields (res);
 428         if (field_num < 2)
 429         {
 430                 ERROR ("mysql plugin: Failed to get master statistics: "
 431                                 "`%s' returned less than two columns.", query);
 432                 mysql_free_result (res);
 433                 return (-1);
 434         }
 435
 436         position = atoll (row[1]);
 437         counter_submit ("mysql_log_position", "master-bin", position, db);
 438
 439         row = mysql_fetch_row (res);
 440         if (row != NULL)
 441                 WARNING ("mysql plugin: `%s' returned more than one row - "
 442                                 "ignoring further results.", query);
 443
 444         mysql_free_result (res);
 445
 446         return (0);
 447 } /* mysql_read_master_stats */
 448
 449 static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
 450 {
 451         MYSQL_RES *res;
 452         MYSQL_ROW  row;
 453
 454         char *query;
 455         int   field_num;
 456
 457         /* WTF? libmysqlclient does not seem to provide any means to
 458          * translate a column name to a column index ... :-/ */
 459         const int READ_MASTER_LOG_POS_IDX   = 6;
 460         const int SLAVE_IO_RUNNING_IDX      = 10;
 461         const int SLAVE_SQL_RUNNING_IDX     = 11;
 462         const int EXEC_MASTER_LOG_POS_IDX   = 21;
 463         const int SECONDS_BEHIND_MASTER_IDX = 32;
 464
 465         query = "SHOW SLAVE STATUS";
 466
 467         res = exec_query (con, query);
 468         if (res == NULL)
 469                 return (-1);
 470
 471         row = mysql_fetch_row (res);
 472         if (row == NULL)
 473         {
 474                 ERROR ("mysql plugin: Failed to get slave statistics: "
 475                                 "`%s' did not return any rows.", query);
 476                 mysql_free_result (res);
 477                 return (-1);
 478         }
 479
 480         field_num = mysql_num_fields (res);
 481         if (field_num < 33)
 482         {
 483                 ERROR ("mysql plugin: Failed to get slave statistics: "
 484                                 "`%s' returned less than 33 columns.", query);
 485                 mysql_free_result (res);
 486                 return (-1);
 487         }
 488
 489         if (db->slave_stats)
 490         {
 491                 unsigned long long counter;
 492                 double gauge;
 493
 494                 counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
 495                 counter_submit ("mysql_log_position", "slave-read", counter, db);
 496
 497                 counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
 498                 counter_submit ("mysql_log_position", "slave-exec", counter, db);
 499
 500                 if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
 501                 {
 502                         gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
 503                         gauge_submit ("time_offset", NULL, gauge, db);
 504                 }
 505         }
 506
 507         if (db->slave_notif)
 508         {
 509                 notification_t n = { 0, cdtime (), "", "",
 510                         "mysql", "", "time_offset", "", NULL };
 511
 512                 char *io, *sql;
 513
 514                 io  = row[SLAVE_IO_RUNNING_IDX];
 515                 sql = row[SLAVE_SQL_RUNNING_IDX];
 516
 517                 set_host (db, n.host, sizeof (n.host));
 518
 519                 /* Assured by "mysql_config_database" */
 520                 assert (db->instance != NULL);
 521                 sstrncpy (n.plugin_instance, db->instance, sizeof (n.plugin_instance));
 522
 523                 if (((io == NULL) || (strcasecmp (io, "yes") != 0))
 524                                 && (db->slave_io_running))
 525                 {
 526                         n.severity = NOTIF_WARNING;
 527                         ssnprintf (n.message, sizeof (n.message),
 528                                         "slave I/O thread not started or not connected to master");
 529                         plugin_dispatch_notification (&n);
 530                         db->slave_io_running = 0;
 531                 }
 532                 else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
 533                                 && (! db->slave_io_running))
 534                 {
 535                         n.severity = NOTIF_OKAY;
 536                         ssnprintf (n.message, sizeof (n.message),
 537                                         "slave I/O thread started and connected to master");
 538                         plugin_dispatch_notification (&n);
 539                         db->slave_io_running = 1;
 540                 }
 541
 542                 if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
 543                                 && (db->slave_sql_running))
 544                 {
 545                         n.severity = NOTIF_WARNING;
 546                         ssnprintf (n.message, sizeof (n.message),
 547                                         "slave SQL thread not started");
 548                         plugin_dispatch_notification (&n);
 549                         db->slave_sql_running = 0;
 550                 }
 551                 else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
 552                                 && (! db->slave_sql_running))
 553                 {
 554                         n.severity = NOTIF_OKAY;
 555                         ssnprintf (n.message, sizeof (n.message),
 556                                         "slave SQL thread started");
 557                         plugin_dispatch_notification (&n);
 558                         db->slave_sql_running = 1;
 559                 }
 560         }
 561
 562         row = mysql_fetch_row (res);
 563         if (row != NULL)
 564                 WARNING ("mysql plugin: `%s' returned more than one row - "
 565                                 "ignoring further results.", query);
 566
 567         mysql_free_result (res);
 568
 569         return (0);
 570 } /* mysql_read_slave_stats */
 571
 572 static int mysql_read (user_data_t *ud)
 573 {
 574         mysql_database_t *db;
 575         MYSQL     *con;
 576         MYSQL_RES *res;
 577         MYSQL_ROW  row;
 578         char      *query;
 579
 580         derive_t qcache_hits          = 0;
 581         derive_t qcache_inserts       = 0;
 582         derive_t qcache_not_cached    = 0;
 583         derive_t qcache_lowmem_prunes = 0;
 584         gauge_t qcache_queries_in_cache = NAN;
 585
 586         gauge_t threads_running   = NAN;
 587         gauge_t threads_connected = NAN;
 588         gauge_t threads_cached    = NAN;
 589         derive_t threads_created = 0;
 590
 591         unsigned long long traffic_incoming = 0ULL;
 592         unsigned long long traffic_outgoing = 0ULL;
 593
 594         if ((ud == NULL) || (ud->data == NULL))
 595         {
 596                 ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
 597                 return (-1);
 598         }
 599
 600         db = (mysql_database_t *) ud->data;
 601
 602         /* An error message will have been printed in this case */
 603         if ((con = getconnection (db)) == NULL)
 604                 return (-1);
 605
 606         query = "SHOW STATUS";
 607         if (mysql_get_server_version (con) >= 50002)
 608                 query = "SHOW GLOBAL STATUS";
 609
 610         res = exec_query (con, query);
 611         if (res == NULL)
 612                 return (-1);
 613
 614         while ((row = mysql_fetch_row (res)))
 615         {
 616                 char *key;
 617                 unsigned long long val;
 618
 619                 key = row[0];
 620                 val = atoll (row[1]);
 621
 622                 if (strncmp (key, "Com_",
 623                                   strlen ("Com_")) == 0)
 624                 {
 625                         if (val == 0ULL)
 626                                 continue;
 627
 628                         /* Ignore `prepared statements' */
 629                         if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
 630                                 counter_submit ("mysql_commands",
 631                                                 key + strlen ("Com_"),
 632                                                 val, db);
 633                 }
 634                 else if (strncmp (key, "Handler_",
 635                                         strlen ("Handler_")) == 0)
 636                 {
 637                         if (val == 0ULL)
 638                                 continue;
 639
 640                         counter_submit ("mysql_handler",
 641                                         key + strlen ("Handler_"),
 642                                         val, db);
 643                 }
 644                 else if (strncmp (key, "Qcache_",
 645                                         strlen ("Qcache_")) == 0)
 646                 {
 647                         if (strcmp (key, "Qcache_hits") == 0)
 648                                 qcache_hits = (derive_t) val;
 649                         else if (strcmp (key, "Qcache_inserts") == 0)
 650                                 qcache_inserts = (derive_t) val;
 651                         else if (strcmp (key, "Qcache_not_cached") == 0)
 652                                 qcache_not_cached = (derive_t) val;
 653                         else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
 654                                 qcache_lowmem_prunes = (derive_t) val;
 655                         else if (strcmp (key, "Qcache_queries_in_cache") == 0)
 656                                 qcache_queries_in_cache = (gauge_t) val;
 657                 }
 658                 else if (strncmp (key, "Bytes_",
 659                                         strlen ("Bytes_")) == 0)
 660                 {
 661                         if (strcmp (key, "Bytes_received") == 0)
 662                                 traffic_incoming += val;
 663                         else if (strcmp (key, "Bytes_sent") == 0)
 664                                 traffic_outgoing += val;
 665                 }
 666                 else if (strncmp (key, "Threads_",
 667                                         strlen ("Threads_")) == 0)
 668                 {
 669                         if (strcmp (key, "Threads_running") == 0)
 670                                 threads_running = (gauge_t) val;
 671                         else if (strcmp (key, "Threads_connected") == 0)
 672                                 threads_connected = (gauge_t) val;
 673                         else if (strcmp (key, "Threads_cached") == 0)
 674                                 threads_cached = (gauge_t) val;
 675                         else if (strcmp (key, "Threads_created") == 0)
 676                                 threads_created = (derive_t) val;
 677                 }
 678                 else if (strncmp (key, "Table_locks_",
 679                                         strlen ("Table_locks_")) == 0)
 680                 {
 681                         counter_submit ("mysql_locks",
 682                                         key + strlen ("Table_locks_"),
 683                                         val, db);
 684                 }
 685                 else if (db->innodb_stats && strncmp (key, "Innodb_", strlen ("Innodb_")) == 0)
 686                 {
 687                         /* buffer pool */
 688                         if (strcmp (key, "Innodb_buffer_pool_pages_data") == 0)
 689                                 gauge_submit ("mysql_bpool_pages", "data", val, db);
 690                         else if (strcmp (key, "Innodb_buffer_pool_pages_dirty") == 0)
 691                                 gauge_submit ("mysql_bpool_pages", "dirty", val, db);
 692                         else if (strcmp (key, "Innodb_buffer_pool_pages_flushed") == 0)
 693                                 counter_submit ("mysql_bpool_counters", "flushed", val, db);
 694                         else if (strcmp (key, "Innodb_buffer_pool_pages_free") == 0)
 695                                 gauge_submit ("mysql_bpool_pages", "free", val, db);
 696                         else if (strcmp (key, "Innodb_buffer_pool_pages_misc") == 0)
 697                                 gauge_submit ("mysql_bpool_pages", "misc", val, db);
 698                         else if (strcmp (key, "Innodb_buffer_pool_pages_total") == 0)
 699                                 gauge_submit ("mysql_bpool_pages", "total", val, db);
 700                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_rnd") == 0)
 701                                 counter_submit ("mysql_bpool_counters", "read_ahead_rnd", val, db);
 702                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead") == 0)
 703                                 counter_submit ("mysql_bpool_counters", "read_ahead", val, db);
 704                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_evicted") == 0)
 705                                 counter_submit ("mysql_bpool_counters", "read_ahead_evicted", val, db);
 706                         else if (strcmp (key, "Innodb_buffer_pool_read_requests") == 0)
 707                                 counter_submit ("mysql_bpool_counters", "read_requests", val, db);
 708                         else if (strcmp (key, "Innodb_buffer_pool_reads") == 0)
 709                                 counter_submit ("mysql_bpool_counters", "reads", val, db);
 710                         else if (strcmp (key, "Innodb_buffer_pool_write_requests") == 0)
 711                                 counter_submit ("mysql_bpool_counters", "write_requests", val, db);
 712
 713                         /* data */
 714                         if (strcmp (key, "Innodb_data_fsyncs") == 0)
 715                                 counter_submit ("mysql_innodb_data", "fsyncs", val, db);
 716                         else if (strcmp (key, "Innodb_data_read") == 0)
 717                                 counter_submit ("mysql_innodb_data", "read", val, db);
 718                         else if (strcmp (key, "Innodb_data_reads") == 0)
 719                                 counter_submit ("mysql_innodb_data", "reads", val, db);
 720                         else if (strcmp (key, "Innodb_data_writes") == 0)
 721                                 counter_submit ("mysql_bpool_counters", "writes", val, db);
 722                         else if (strcmp (key, "Innodb_data_written") == 0)
 723                                 counter_submit ("mysql_innodb_data", "written", val, db);
 724
 725                         /* double write */
 726                         else if (strcmp (key, "Innodb_dblwr_writes") == 0)
 727                                 counter_submit ("mysql_innodb_dblwr", "writes", val, db);
 728                         else if (strcmp (key, "Innodb_dblwr_pages_written") == 0)
 729                                 counter_submit ("mysql_innodb_dblwr", "written", val, db);
 730
 731                         /* rows */
 732                         else if (strcmp (key, "Innodb_rows_deleted") == 0)
 733                                 counter_submit ("mysql_innodb_rows", "deleted", val, db);
 734                         else if (strcmp (key, "Innodb_rows_inserted") == 0)
 735                                 counter_submit ("mysql_innodb_rows", "inserted", val, db);
 736                         else if (strcmp (key, "Innodb_rows_read") == 0)
 737                                 counter_submit ("mysql_innodb_rows", "read", val, db);
 738                         else if (strcmp (key, "Innodb_rows_updated") == 0)
 739                                 counter_submit ("mysql_innodb_rows", "updated", val, db);
 740                 }
 741                 else if (strncmp (key, "Select_",
 742                                         strlen ("Select_")) == 0)
 743                 {
 744                         counter_submit ("mysql_select",
 745                                         key + strlen ("Select_"),
 746                                         val, db);
 747                 }
 748                 else if (strncmp (key, "Sort_",
 749                                         strlen ("Sort_")) == 0)
 750                 {
 751                         counter_submit ("mysql_sort",
 752                                         key + strlen ("Sort_"),
 753                                         val, db);
 754                 }
 755         }
 756         mysql_free_result (res); res = NULL;
 757
 758         if ((qcache_hits != 0)
 759                         || (qcache_inserts != 0)
 760                         || (qcache_not_cached != 0)
 761                         || (qcache_lowmem_prunes != 0))
 762         {
 763                 derive_submit ("cache_result", "qcache-hits",
 764                                 qcache_hits, db);
 765                 derive_submit ("cache_result", "qcache-inserts",
 766                                 qcache_inserts, db);
 767                 derive_submit ("cache_result", "qcache-not_cached",
 768                                 qcache_not_cached, db);
 769                 derive_submit ("cache_result", "qcache-prunes",
 770                                 qcache_lowmem_prunes, db);
 771
 772                 gauge_submit ("cache_size", "qcache",
 773                                 qcache_queries_in_cache, db);
 774         }
 775
 776         if (threads_created != 0)
 777         {
 778                 gauge_submit ("threads", "running",
 779                                 threads_running, db);
 780                 gauge_submit ("threads", "connected",
 781                                 threads_connected, db);
 782                 gauge_submit ("threads", "cached",
 783                                 threads_cached, db);
 784
 785                 derive_submit ("total_threads", "created",
 786                                 threads_created, db);
 787         }
 788
 789         traffic_submit  (traffic_incoming, traffic_outgoing, db);
 790
 791         if (db->master_stats)
 792                 mysql_read_master_stats (db, con);
 793
 794         if ((db->slave_stats) || (db->slave_notif))
 795                 mysql_read_slave_stats (db, con);
 796
 797         return (0);
 798 } /* int mysql_read */
 799
 800 void module_register (void)
 801 {
 802         plugin_register_complex_config ("mysql", mysql_config);
 803 } /* void module_register */