Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

#include "housekeeper.h"

​

#include "log.h"

#include "zbxnix.h"

#include "zbxself.h"

#include "zbxcacheconfig.h"

#include "zbxrtc.h"

#include "zbxnum.h"

#include "zbxtime.h"

#include "zbx_rtc_constants.h"

​

/* the maximum number of housekeeping periods to be removed per single housekeeping cycle */

#define HK_MAX_DELETE_PERIODS   4

​

/******************************************************************************

 *                                                                            *

 * Purpose: remove outdated information from historical table                 *

 *                                                                            *

 * Parameters: now - current timestamp                                        *

 *                                                                            *

 * Return value: number of rows records                                       *

 *                                                                            *

 ******************************************************************************/

static int  delete_history(const char *table, const char *fieldname, int now)

{

    DB_RESULT   result;

    DB_ROW      row;

    int     records = 0;

    zbx_uint64_t    lastid, maxid;

    char        *condition = NULL;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s() table:'%s' now:%d", __func__, table, now);

​

    zbx_db_begin();

​

    result = zbx_db_select(

            "select nextid"

            " from ids"

            " where table_name='%s'"

                " and field_name='%s'",

            table, fieldname);

​

    if (NULL == (row = zbx_db_fetch(result)))

        goto rollback;

​

    ZBX_STR2UINT64(lastid, row[0]);

    zbx_db_free_result(result);

​

    result = zbx_db_select("select max(id) from %s",

            table);

​

    if (NULL == (row = zbx_db_fetch(result)) || SUCCEED == zbx_db_is_null(row[0]))

        goto rollback;

​

    ZBX_STR2UINT64(maxid, row[0]);

    zbx_db_free_result(result);

​

    if (0 != CONFIG_PROXY_LOCAL_BUFFER)

        condition = zbx_dsprintf(NULL, " and clock<%d", now - CONFIG_PROXY_LOCAL_BUFFER * SEC_PER_HOUR);

​

    records = zbx_db_execute(

            "delete from %s"

            " where id<" ZBX_FS_UI64

                " and (clock<%d"

                    " or (id<=" ZBX_FS_UI64 "%s))",

            table, maxid,

            now - CONFIG_PROXY_OFFLINE_BUFFER * SEC_PER_HOUR,

            lastid,

            ZBX_NULL2EMPTY_STR(condition));

    zbx_free(condition);

​

    zbx_db_commit();