Innodb-buffer-pool-instances-is-a-read-only-variable, related articles. how to change the innodb_log_file_size value in mysql/mariadb how to upgrade mysql 5.5 to 5.6/5.7 or mariadb 5.5 to 10.0/10.1/10.2/10.3 on linux?. Innodb read and write i/o threads in mysql. besides innodb_buffer_pool_instances, you can also increase the number of innodb read i/o threads and write i/o threads. these are configured with innodb_write_io_threads and innodb_read_io_threads.. both settings default to 4 threads. we can increase these to, for example, 8:, thanks. set global innodb_buffer_pool_instances=16; error 1238 (hy000): variable 'innodb_buffer_pool_instances' is a read only variable. i think it should be added in my.cnf and need a restart? – bhuvanesh sep 13 '17 at 4:48. yes. whenever given advice, it is a good idea to read the manual to make sure our free advice is right for you..

You can configure innodb buffer pool size offline (at startup) or online, while the server is running. behavior described in this section applies to both methods. for additional information about configuring buffer pool size online, see configuring innodb buffer pool size online.. when increasing or decreasing innodb_buffer_pool_size, the operation is performed in chunks., really frustrating issue. my innodb_buffer_pool_size is set to 32m, and i want to lower it. the variable in my.cnf is actually set to 2m, and i can't find any other overriding configuration files (....

System variables that are true or false can be enabled at server startup by naming them, or disabled by using a --skip- prefix. for example, to enable or disable the innodb adapti, the --innodb-status-file startup option controls whether innodb creates a file named in the data directory and writes show engine innodb status output to it every 15 seconds, approximately.. the file is not created by default. to create it, start mysqld with the --innodb-status-file option..

List of system variables., mariadb server is a community developed fork of mysql server. started by core members of the original mysql team, mariadb actively works with outside developers to deliver the most featureful, stable, and sanely licensed open sql server in the industry. - mariadb/server