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/*
** ZABBIX
** Copyright (C) 2000-2005 SIA Zabbix
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
#include "common.h"
#include "cfg.h"
#include "db.h"
#include "log.h"
#include "housekeeper.h"
/******************************************************************************
* *
* Function: delete_history *
* *
* Purpose: remove outdated information from historical table *
* *
* Parameters: now - current timestamp *
* *
* Return value: number of rows records *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int delete_history(const char *table, const char *fieldname, int now)
{
DB_RESULT result;
DB_ROW row;
int minclock, records = 0;
zbx_uint64_t lastid;
zabbix_log(LOG_LEVEL_DEBUG, "In delete_history() [table:%s] [now:%d]",
table,
now);
DBbegin();
result = DBselect("select nextid from ids where table_name='%s' and field_name='%s'",
table,
fieldname);
if (NULL == (row = DBfetch(result)) || DBis_null(row[0]) == SUCCEED)
goto rollback;
lastid = zbx_atoui64(row[0]);
DBfree_result(result);
result = DBselect("select min(clock) from %s",
table);
if (NULL == (row = DBfetch(result)) || DBis_null(row[0]) == SUCCEED)
goto rollback;
minclock = atoi(row[0]);
DBfree_result(result);
records = DBexecute("delete from %s where clock<%d or (id<" ZBX_FS_UI64 " and clock<%d)",
table,
now - CONFIG_PROXY_OFFLINE_BUFFER * 3600,
lastid,
MIN(now - CONFIG_PROXY_LOCAL_BUFFER * 3600, minclock + 4 * CONFIG_HOUSEKEEPING_FREQUENCY * 3600));
DBcommit();
return records;
rollback:
DBfree_result(result);
DBrollback();
return 0;
}
/******************************************************************************
* *
* Function: housekeeping_history *
* *
* Purpose: remove outdated information from history and trends *
* *
* Parameters: now - current timestamp *
* *
* Return value: SUCCEED - information removed succesfully *
* FAIL - otherwise *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int housekeeping_history(int now)
{
int records = 0;
zabbix_log(LOG_LEVEL_DEBUG, "In housekeeping_history()");
records += delete_history("proxy_history", "history_lastid", now);
records += delete_history("proxy_dhistory", "dhistory_lastid", now);
return records;
}
int main_housekeeper_loop()
{
int records;
int start, sleeptime;
double sec;
if (CONFIG_DISABLE_HOUSEKEEPING == 1) {
zbx_setproctitle("housekeeper [disabled]");
for(;;) /* Do nothing */
sleep(3600);
}
for (;;) {
start = time(NULL);
zabbix_log(LOG_LEVEL_WARNING, "Executing housekeeper");
zbx_setproctitle("housekeeper [connecting to the database]");
DBconnect(ZBX_DB_CONNECT_NORMAL);
zbx_setproctitle("housekeeper [removing old history]");
sec = zbx_time();
records = housekeeping_history(start);
zabbix_log(LOG_LEVEL_WARNING, "Deleted %d records from history [%f seconds]",
records,
zbx_time() - sec);
DBclose();
sleeptime = CONFIG_HOUSEKEEPING_FREQUENCY * 3600 - (time(NULL) - start);
if (sleeptime > 0) {
zbx_setproctitle("housekeeper [sleeping for %d seconds]",
sleeptime);
zabbix_log(LOG_LEVEL_DEBUG, "Sleeping for %d seconds",
sleeptime);
sleep(sleeptime);
}
}
}
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