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Restrictions

Max. Limit of Connections

MySQL

Instance Type Max. Connections
1-core 1GB 300
1-core 2GB 600
1-core 4GB 1200
2-core 8GB 2000
2-core 16GB 3000
4-core 16GB 4000
4-core 32GB 6000
8-core 32GB 8000
8-core 64GB 12000
16-core 64GB 16000
16-core 128GB 24000

Read-only JCS for MySQL Instance

Instance Type Max. Connections
1-core 1GB 300
1-core 2GB 600
1-core 4GB 1200
2-core 8GB 2000
2-core 16GB 3000
4-core 16GB 4000
4-core 32GB 6000
8-core 32GB 8000
8-core 64GB 12000
16-core 64GB 16000
16-core 128GB 24000

Functional Limits

Capacity Reduction Operation

  • The capacity reduction of the instance currently is not supported.

Database Version Upgrade

  • Database version cannot be upgraded currently. For example, JCS for MySQL 5.6 is upgraded to JCS for MySQL 5.7.

Instance Restore

  • Deleted instances cannot be recovered.

Instance Creation

  • There are limits on the number of instances in a single region. A region can support up to 5 instances by default. If there are more instances required, please submit the open ticket.

Reserved Keywords of Database Name

mysql,information_schema,performance_schema,sys,percona, admin, aurora, replicator, xtrabak, root, mysql, test, eagleye, information_schema, guest, add, analyze, asc, between, blob, call, change, check, condition, continue, cross, current_timestamp, database, day_microsecond, dec, default, desc, distinct, double, each, enclosed, exit, fetch, float8, foreign, goto, having, hour_minute, ignore, infile, insensitiv, int1, int4, interval, iterate, keys, leading, like, lines, localtimestamp, longblob, low_priority, mediumint, minute_microsecond, modifies, no_write_to_binlog, on, optionally, out, precision, purge, read, references, rename, require, revoke, schema, select, set, spatial, sqlexception, sql_big_result, ssl, table, tinyblob, to, true, unique, update, using, utc_timestamp, varchar, when, with, xor, all, and, asensitive, bigint, both, cascade, char, collate, connection, convert, current_date, current_user, databases, day_minute, decimal, delayed, describe, distinctrow, drop, else, escaped, explain, float, for, from, grant, high_priority, hour_second, in, inner, insert, int2, int8, into, join, kill, leave, limit, load, lock, longtext, match, mediumtext, minute_second, natural, null, optimize, or, outer, primary, raid0, reads, regexp, repeat, restrict, right, schemas, sensitive, show, specific, sqlstate, sql_calc_found_rows, starting, terminated, tinyint, trailing, undo, unlock, usage, utc_date, values, varcharacter, where, write, year_month, alter, as, before, binary, by, case, character, column, constraint, create, current_time, cursor, day_hour, day_second, declare, delete, deterministic, div, dual, elseif, exists, false, float4, force, fulltext, group, hour_microsecond, if, index, inout, int, int3, integer, is, key, label, left, linear, localtime, long, loop, mediumblob, middleint, mod, not, numeric, option, order, outfile, procedure, range, real, release, replace, return, rlike, second_microsecond, separator, smallint, sql, sqlwarning, sql_small_result, straight_join, then, tinytext, trigger, union, unsigned, use, utc_time, varbinary, varying, while, x509, zerofill, jcloud_yunding_db_push, jcloudv_push_rw, jcloudv_push_ro, jddb_percona

Reserved Keywords of Database Account

root,admin,os_admin,replicater,monitor,percona, admin, aurora, replicator, xtrabak, root, mysql, test, eagleye, information_schema, guest, add, analyze, asc, between, blob, call, change, check, condition, continue, cross, current_timestamp, database, day_microsecond, dec, default, desc, distinct, double, each, enclosed, exit, fetch, float8, foreign, goto, having, hour_minute, ignore, infile, insensitiv, int1, int4, interval, iterate, keys, leading, like, lines, localtimestamp, longblob, low_priority, mediumint, minute_microsecond, modifies, no_write_to_binlog, on, optionally, out, precision, purge, read, references, rename, require, revoke, schema, select, set, spatial, sqlexception, sql_big_result, ssl, table, tinyblob, to, true, unique, update, using, utc_timestamp, varchar, when, with, xor, all, and, asensitive, bigint, both, cascade, char, collate, connection, convert, current_date, current_user, databases, day_minute, decimal, delayed, describe, distinctrow, drop, else, escaped, explain, float, for, from, grant, high_priority, hour_second, in, inner, insert, int2, int8, into, join, kill, leave, limit, load, lock, longtext, match, mediumtext, minute_second, natural, null, optimize, or, outer, primary, raid0, reads, regexp, repeat, restrict, right, schemas, sensitive, show, specific, sqlstate, sql_calc_found_rows, starting, terminated, tinyint, trailing, undo, unlock, usage, utc_date, values, varcharacter, where, write, year_month, alter, as, before, binary, by, case, character, column, constraint, create, current_time, cursor, day_hour, day_second, declare, delete, deterministic, div, dual, elseif, exists, false, float4, force, fulltext, group, hour_microsecond, if, index, inout, int, int3, integer, is, key, label, left, linear, localtime, long, loop, mediumblob, middleint, mod, not, numeric, option, order, outfile, procedure, range, real, release, replace, return, rlike, second_microsecond, separator, smallint, sql, sqlwarning, sql_small_result, straight_join, then, tinytext, trigger, union, unsigned, use, utc_time, varbinary, varying, while, x509, zerofill, jcloud_yunding_db_push, jcloudv_push_rw, jcloudv_push_ro, jddbaclholder
Update Time:2019-08-20 19:16:31