• version_compile_zlib : Version of compiled-in zlib library. Added in MySQL 8.0.11. 

• windowing_use_high_precision : Whether to compute window functions to high precision. Added in MySQL 8.0.2. 

## Options and Variables Deprecated in MySQL 8.0 

The following system variables, status variables, and options have been deprecated in MySQL 8.0. 

• Compression : Whether client connection uses compression in client/server protocol. Deprecated in MySQL 8.0.18. 

• admin-ssl : Enable connection encryption. Deprecated in MySQL 8.0.26. 

• expire_logs_days : Purge binary logs after this many days. Deprecated in MySQL 8.0.3. 

• group_replication_ip_whitelist : List of hosts permitted to connect to group. Deprecated in MySQL 8.0.22. 

• have_openssl : Whether mysqld supports SSL connections. Deprecated in MySQL 8.0.26. 

• have_ssl : Whether mysqld supports SSL connections. Deprecated in MySQL 8.0.26. 

• innodb_undo_tablespaces : Number of tablespace files that rollback segments are divided between. Deprecated in MySQL 8.0.4. 

• log_bin_use_v1_row_events : Whether server is using version 1 binary log row events. Deprecated in MySQL 8.0.18. 

• log_syslog : Whether to write error log to syslog. Deprecated in MySQL 8.0.2. 

• master-info-file : Location and name of file that remembers source and where I/O replication thread is in source’s binary log. Deprecated in MySQL 8.0.18. 

• master_info_repository : Whether to write connection metadata repository, containing source information and replication I/O thread location in source’s binary log, to file or table. Deprecated in MySQL 8.0.23. 

• max_length_for_sort_data : Max number of bytes in sorted records. Deprecated in MySQL 8.0.20. 

• no-dd-upgrade : Prevent automatic upgrade of data dictionary tables at startup. Deprecated in MySQL 8.0.16. 

• relay_log_info_file : File name for applier metadata repository in which replica records information about relay logs. Deprecated in MySQL 8.0.18. 

• relay_log_info_repository : Whether to write location of replication SQL thread in relay logs to file or table. Deprecated in MySQL 8.0.23. 

• slave_compressed_protocol : Use compression of source/replica protocol. Deprecated in MySQL 8.0.18. 

• slave_rows_search_algorithms : Determines search algorithms used for replica update batching. Any 2 or 3 from this list: INDEX_SEARCH, TABLE_SCAN, HASH_SCAN. Deprecated in MySQL 8.0.18. 

• ssl : Enable connection encryption. Deprecated in MySQL 8.0.26. 

• symbolic-links : Permit symbolic links for MyISAM tables. Deprecated in MySQL 8.0.2. 

