Zabbix

/*

** Zabbix

** Copyright (C) 2001-2022 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 "common.h"

#include "zbxdb.h"

#include "dbcache.h"

#include "log.h"

#include "history_compress.h"

​

#if defined(HAVE_POSTGRESQL)

​

#define ZBX_TS_SEGMENT_BY   "itemid"

#define ZBX_TS_UNIX_NOW     "zbx_ts_unix_now"

#define ZBX_TS_UNIX_NOW_CREATE  "create or replace function "ZBX_TS_UNIX_NOW"() returns integer language sql" \

                " stable as $$ select extract(epoch from now())::integer $$"

​

#define COMPRESSION_TOLERANCE       (SEC_PER_HOUR * 2)

#define COMPRESSION_POLICY_REMOVE   (0 == ZBX_DB_TSDB_V1 ? "remove_compression_policy" : \

                    "remove_compress_chunks_policy")

#define COMPRESSION_POLICY_ADD      (0 == ZBX_DB_TSDB_V1 ? "add_compression_policy" : \

                    "add_compress_chunks_policy")

​

typedef enum

{

    ZBX_COMPRESS_TABLE_HISTORY = 0,

    ZBX_COMPRESS_TABLE_TRENDS

} zbx_compress_table_t;

​

typedef struct

{

    const char      *name;

    zbx_compress_table_t    type;

} zbx_history_table_compression_options_t;

​

static zbx_history_table_compression_options_t  compression_tables[] = {

    {"history",     ZBX_COMPRESS_TABLE_HISTORY},

    {"history_uint",    ZBX_COMPRESS_TABLE_HISTORY},

    {"history_str",     ZBX_COMPRESS_TABLE_HISTORY},

    {"history_text",    ZBX_COMPRESS_TABLE_HISTORY},

    {"history_log",     ZBX_COMPRESS_TABLE_HISTORY},

    {"trends",      ZBX_COMPRESS_TABLE_TRENDS},

    {"trends_uint",     ZBX_COMPRESS_TABLE_TRENDS}

};

​

static unsigned char    compression_status_cache = 0;

static int      compress_older_cache = 0;

​