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3 Database upgrade to primary keys
Overview
Since Zabbix 6.0, primary keys are used for all tables in new installations.
This section provides instructions for manually upgrading the history tables in existing installations to primary keys.
Instructions are available for:
Important notes
- Make sure to back up the database before the upgrade
- If your database uses partitions, contact your DB administrator or Zabbix support team for help
- The CSV files can be removed after a successful upgrade to primary keys
MySQL
Export and import must be performed in tmux/screen, so that the session isn't dropped.
See also: Important notes
MySQL 5.7+/8.0+
- Rename old tables, create new tables by running
history_pk_prepare.sql.
mysql -uzabbix -p<password> zabbix < /usr/share/doc/zabbix-sql-scripts/mysql/history_pk_prepare.sql- Export and import data
mysqlsh should be installed. mysqlsh should be able to connect to the DB. If connection is done through socket, it could be needed to explicitly state a path to it.
Connect via mysqlsh:
Run (CSVPATH should/could be tweaked according to needs):
CSVPATH="/var/lib/mysql-files";
util.exportTable("history_old", CSVPATH + "/history.csv", { dialect: "csv" });
util.importTable(CSVPATH + "/history.csv", {"dialect": "csv", "table": "history" });
util.exportTable("history_uint_old", CSVPATH + "/history_uint.csv", { dialect: "csv" });
util.importTable(CSVPATH + "/history_uint.csv", {"dialect": "csv", "table": "history_uint" });
util.exportTable("history_str_old", CSVPATH + "/history_str.csv", { dialect: "csv" });
util.importTable(CSVPATH + "/history_str.csv", {"dialect": "csv", "table": "history_str" });
util.exportTable("history_log_old", CSVPATH + "/history_log.csv", { dialect: "csv" });
util.importTable(CSVPATH + "/history_log.csv", {"dialect": "csv", "table": "history_log" });
util.exportTable("history_text_old", CSVPATH + "/history_text.csv", { dialect: "csv" });
util.importTable(CSVPATH + "/history_text.csv", {"dialect": "csv", "table": "history_text" });Verify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;MySQL <5.7, MariaDB (or if mysqlsh cannot be used for some reason)
This option is slower and more time consuming, use only if there is a reason not to use mysqlsh.
- Rename old tables, create new tables by running
history_pk_prepare.sql.
mysql -uzabbix -p<password> zabbix < /usr/share/doc/zabbix-sql-scripts/mysql/history_pk_prepare.sql- Export and import data
Check if import/export is enabled only for files in the specific path:
mysql> SELECT @@secure_file_priv;
+-----------------------+
| @@secure_file_priv |
+-----------------------+
| /var/lib/mysql-files/ |
+-----------------------+If the value is a path to directory, export/import could be performed for files in that directory. In this case paths to files in queries should be edited accordingly. Alternatively, secure_file_priv could be disabled (set to empty string) during upgrade. If the value is empty, export/import could be performed to/from files that could be located anywhere.
max_execution_time should be disabled before exporting data to avoid timeout during export.
SET @@max_execution_time=0;
SELECT * INTO OUTFILE '/var/lib/mysql-files/history.csv' FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n' FROM history_old;
LOAD DATA INFILE '/var/lib/mysql-files/history.csv' IGNORE INTO TABLE history FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n';
SELECT * INTO OUTFILE '/var/lib/mysql-files/history_uint.csv' FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n' FROM history_uint_old;
LOAD DATA INFILE '/var/lib/mysql-files/history_uint.csv' IGNORE INTO TABLE history_uint FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n';
SELECT * INTO OUTFILE '/var/lib/mysql-files/history_str.csv' FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n' FROM history_str_old;
LOAD DATA INFILE '/var/lib/mysql-files/history_str.csv' IGNORE INTO TABLE history_str FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n';
SELECT * INTO OUTFILE '/var/lib/mysql-files/history_log.csv' FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n' FROM history_log_old;
LOAD DATA INFILE '/var/lib/mysql-files/history_log.csv' IGNORE INTO TABLE history_log FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n';
SELECT * INTO OUTFILE '/var/lib/mysql-files/history_text.csv' FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n' FROM history_text_old;
LOAD DATA INFILE '/var/lib/mysql-files/history_text.csv' IGNORE INTO TABLE history_text FIELDS TERMINATED BY ',' ESCAPED BY '"' LINES TERMINATED BY '\n';Verify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;Improving performance
Additional hints for improving performance in both cases:
- Increase bulk_insert_buffer_size buffer in the configuration file inside [mysqld] section or set it before import with SET:
[mysqld]
bulk_insert_buffer_size=256M
mysql cli > SET SESSION bulk_insert_buffer_size= 1024 * 1024 * 256;
mysql cli > ... import queries ... See "Optimizing InnoDB bulk data loading": (MySQL 5.7, MySQL 8.0)
Disable binary logging (should not be used in case of a slave servers, since will not replicate data):
mysql cli > SET SESSION SQL_LOG_BIN=0;
mysql cli > ... import queries ...PostgreSQL
Export and import must be performed in tmux/screen, so that the session isn't dropped.
See also: Important notes
Upgrading tables
- Rename tables using
history_pk_prepare.sql.
sudo -u zabbix psql zabbix < /usr/share/doc/zabbix-sql-scripts/postgresql/history_pk_prepare.sql- Export current history, import it to the temp table, and insert it into new tables while ignoring duplicates
\copy history_old TO '/tmp/history.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
value DOUBLE PRECISION DEFAULT '0.0000' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
\copy temp_history FROM '/tmp/history.csv' DELIMITER ',' CSV
INSERT INTO history SELECT * FROM temp_history ON CONFLICT (itemid,clock,ns) DO NOTHING;
\copy history_uint_old TO '/tmp/history_uint.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history_uint (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
value numeric(20) DEFAULT '0' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
\copy temp_history_uint FROM '/tmp/history_uint.csv' DELIMITER ',' CSV
INSERT INTO history_uint SELECT * FROM temp_history_uint ON CONFLICT (itemid,clock,ns) DO NOTHING;
\copy history_str_old TO '/tmp/history_str.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history_str (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
value varchar(255) DEFAULT '' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
\copy temp_history_str FROM '/tmp/history_str.csv' DELIMITER ',' CSV
INSERT INTO history_str (itemid,clock,value,ns) SELECT * FROM temp_history_str ON CONFLICT (itemid,clock,ns) DO NOTHING;
\copy history_log_old TO '/tmp/history_log.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history_log (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
timestamp integer DEFAULT '0' NOT NULL,
source varchar(64) DEFAULT '' NOT NULL,
severity integer DEFAULT '0' NOT NULL,
value text DEFAULT '' NOT NULL,
logeventid integer DEFAULT '0' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
\copy temp_history_log FROM '/tmp/history_log.csv' DELIMITER ',' CSV
INSERT INTO history_log SELECT * FROM temp_history_log ON CONFLICT (itemid,clock,ns) DO NOTHING;
\copy history_text_old TO '/tmp/history_text.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history_text (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
value text DEFAULT '' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
\copy temp_history_text FROM '/tmp/history_text.csv' DELIMITER ',' CSV
INSERT INTO history_text SELECT * FROM temp_history_text ON CONFLICT (itemid,clock,ns) DO NOTHING;Verify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;Consider using the following tips to improve insert performance:
TimescaleDB v1.x
Export and import must be performed in tmux/screen, so that the session isn't dropped.
See also: Important notes
Upgrading tables
- Rename tables using
history_pk_prepare.sql.
sudo -u zabbix psql zabbix < /usr/share/doc/zabbix-sql-scripts/postgresql/history_pk_prepare.sql- Example of upgrading for one table:
-- Verify that there is enough space to allow export of uncompressed data
select sum(before_compression_total_bytes)/1024/1024 as before_compression_total_mbytes, sum(after_compression_total_bytes)/1024/1024 as after_compression_total_mbytes FROM chunk_compression_stats('history_uint_old');
-- Export data
\copy (select * from history_uint_old) TO '/tmp/history_uint.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history_uint (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
value numeric(20) DEFAULT '0' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
-- Import data
\copy temp_history_uint FROM '/tmp/history_uint.csv' DELIMITER ',' CSV
-- Create hypertable and populate it
select create_hypertable('history_uint', 'clock', chunk_time_interval => 86400, migrate_data => true);
INSERT INTO history_uint SELECT * FROM temp_history_uint ON CONFLICT (itemid,clock,ns) DO NOTHING;
-- Enable compression
select set_integer_now_func('history_uint', 'zbx_ts_unix_now', true);
alter table history_uint set (timescaledb.compress,timescaledb.compress_segmentby='itemid',timescaledb.compress_orderby='clock,ns');
-- Job id will returned, it should be passed to run_job
select add_compress_chunks_policy('history_uint', (
select (p.older_than).integer_interval from _timescaledb_config.bgw_policy_compress_chunks p
inner join _timescaledb_catalog.hypertable h on (h.id=p.hypertable_id) where h.table_name='history_uint'
)::integer
);
select alter_job((select job_id from timescaledb_information.jobs where hypertable_schema='public' and hypertable_name='history_uint'), scheduled => true);
-- Run compression job
call run_job(<JOB_ID>);
-- May show 'NOTICE: no chunks for hypertable public.history_uint that satisfy compress chunk policy', it is fine.Verify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;See also: Tips for improving PostgreSQL insert performance
TimescaleDB v2.x
Export and import must be performed in tmux/screen, so that the session isn't dropped.
See also: Important notes
Upgrading tables
- Rename tables using
history_pk_prepare.sql.
sudo -u zabbix psql zabbix < /usr/share/doc/zabbix-sql-scripts/postgresql/history_pk_prepare.sql- Example of upgrading for one table:
-- Verify that there is enough space to allow export of uncompressed data
select sum(before_compression_total_bytes)/1024/1024 as before_compression_total_mbytes, sum(after_compression_total_bytes)/1024/1024 as after_compression_total_mbytes FROM chunk_compression_stats('history_uint_old');
-- Export data
\copy (select * from history_uint_old) TO '/tmp/history_uint.csv' DELIMITER ',' CSV
CREATE TEMP TABLE temp_history_uint (
itemid bigint NOT NULL,
clock integer DEFAULT '0' NOT NULL,
value numeric(20) DEFAULT '0' NOT NULL,
ns integer DEFAULT '0' NOT NULL
);
-- Import data
\copy temp_history_uint FROM '/tmp/history_uint.csv' DELIMITER ',' CSV
-- Create hypertable and populate it
select create_hypertable('history_uint', 'clock', chunk_time_interval => 86400, migrate_data => true);
INSERT INTO history_uint SELECT * FROM temp_history_uint ON CONFLICT (itemid,clock,ns) DO NOTHING;
-- Enable compression
select set_integer_now_func('history_uint', 'zbx_ts_unix_now', true);
alter table history_uint set (timescaledb.compress,timescaledb.compress_segmentby='itemid',timescaledb.compress_orderby='clock,ns');
-- Substitute your schema in hypertable_schema
-- Job id will returned, it should be passed to run_job
select add_compression_policy('history_uint', (
select extract(epoch from (config::json->>'compress_after')::interval) from timescaledb_information.jobs where application_name like 'Compression%%' and hypertable_schema='public' and hypertable_name='history_uint_old'
)::integer
);
select alter_job((select job_id from timescaledb_information.jobs where hypertable_schema='public' and hypertable_name='history_uint'), scheduled => true);
-- Run compression job
call run_job(<JOB_ID>);
-- May show 'NOTICE: no chunks for hypertable public.history_uint that satisfy compress chunk policy', it is fine.Verify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;See also: Tips for improving PostgreSQL insert performance
Oracle
Export and import must be performed in tmux/screen, so that the session isn't dropped.
See also: Important notes
Importing/exporting history tables in one attempt
- Install Oracle Data Pump (Instant Client Tools package contains it).
Additionally, consider performance tips for Oracle Data Pump.
- Rename tables using
history_pk_prepare.sql.
shell> cd /path/to/zabbix-sources/database/oracle
shell> sqlplus zabbix/[email protected]_host/ORCL
sqlplus> @history_pk_prepare.sql- Prepare directories for datapump
Example:
# mkdir -pv /export/history
# chown -R oracle:oracle /export- Create a directory object, grant permissions to it. Run the following under sysdba role:
create directory history as '/export/history';
grant read,write on directory history to zabbix;- Export tables. Replace N with your desired thread count.
expdp zabbix/[email protected]:1521/z \
DIRECTORY=history \
TABLES=history_old,history_uint_old,history_str_old,history_log_old,history_text_old \
PARALLEL=N- Import tables. Replace N with your desired thread count.
impdp zabbix/[email protected]:1521/z \
DIRECTORY=history \
TABLES=history_uint_old \
REMAP_TABLE=history_old:history,history_uint_old:history_uint,history_str_old:history_str,history_log_old:history_log,history_text_old:history_text \
data_options=SKIP_CONSTRAINT_ERRORS table_exists_action=APPEND PARALLEL=N CONTENT=data_onlyVerify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;Importing/exporting history tables individually
- Install Oracle Data Pump (Instant Client Tools package contains it).
Additionally, consider performance tips for Oracle Data Pump.
- Rename tables using
history_pk_prepare.sql.
shell> cd /path/to/zabbix-sources/database/oracle
shell> sqlplus zabbix/[email protected]_host/ORCL
sqlplus> @history_pk_prepare.sql- Prepare directories for datapump
Example:
# mkdir -pv /export/history /export/history_uint /export/history_str /export/history_log /export/history_text
# chown -R oracle:oracle /export- Create a directory object, grant permissions to it. Run the following under sysdba role:
create directory history as '/export/history';
grant read,write on directory history to zabbix;
create directory history_uint as '/export/history_uint';
grant read,write on directory history_uint to zabbix;
create directory history_str as '/export/history_str';
grant read,write on directory history_str to zabbix;
create directory history_log as '/export/history_log';
grant read,write on directory history_log to zabbix;
create directory history_text as '/export/history_text';
grant read,write on directory history_text to zabbix;- Export and import each table. Replace N with your desired thread count.
expdp zabbix/[email protected]:1521/xe DIRECTORY=history TABLES=history_old PARALLEL=N
impdp zabbix/[email protected]:1521/xe DIRECTORY=history TABLES=history_old REMAP_TABLE=history_old:history data_options=SKIP_CONSTRAINT_ERRORS table_exists_action=APPEND PARALLEL=N CONTENT=data_only
expdp zabbix/[email protected]:1521/xe DIRECTORY=history_uint TABLES=history_uint_old PARALLEL=N
impdp zabbix/[email protected]:1521/xe DIRECTORY=history_uint TABLES=history_uint_old REMAP_TABLE=history_uint_old:history_uint data_options=SKIP_CONSTRAINT_ERRORS table_exists_action=APPEND PARALLEL=N CONTENT=data_only
expdp zabbix/[email protected]:1521/xe DIRECTORY=history_str TABLES=history_str_old PARALLEL=N
impdp zabbix/[email protected]:1521/xe DIRECTORY=history_str TABLES=history_str_old REMAP_TABLE=history_str_old:history_str data_options=SKIP_CONSTRAINT_ERRORS table_exists_action=APPEND PARALLEL=N CONTENT=data_only
expdp zabbix/[email protected]:1521/xe DIRECTORY=history_log TABLES=history_log_old PARALLEL=N
impdp zabbix/[email protected]:1521/xe DIRECTORY=history_log TABLES=history_log_old REMAP_TABLE=history_log_old:history_log data_options=SKIP_CONSTRAINT_ERRORS table_exists_action=APPEND PARALLEL=N CONTENT=data_only
expdp zabbix/[email protected]:1521/xe DIRECTORY=history_text TABLES=history_text_old PARALLEL=N
impdp zabbix/[email protected]:1521/xe DIRECTORY=history_text TABLES=history_text_old REMAP_TABLE=history_text_old:history_text data_options=SKIP_CONSTRAINT_ERRORS table_exists_action=APPEND PARALLEL=N CONTENT=data_onlyVerify that everything works as supposed
Drop old tables
DROP TABLE history_old;
DROP TABLE history_uint_old;
DROP TABLE history_str_old;
DROP TABLE history_log_old;
DROP TABLE history_text_old;