· · · · · · · · · · · 1207 7.7.20 Does TiCDC support replicating large transactions? Is there any risk? 1208 7.7.21 Does TiCDC replicate data changes caused by lossy DDL operations to the downstream? #56005 @ghazalfamilyusa • Increase the cost of table scans in the cost model for scenarios with a high risk of suboptimal execution plans, making the optimizer prefer indexes #56012 @terry1purcell • TiDB supports statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual

expiration. After this policy is enabled, you must change your passwords periodically. This reduces the risk of password leakage due to long-term use and improves password security. For more information, see within a specified period or the most recent several passwords that you have used. This reduces the risk of password leakage due to repeated use of passwords and improves password security. For more information Dashboard on the internet does not involve the privileged inter- faces of PD. Therefore, the security risk of the cluster is reduced. 37 For more information, see documentation. • Performance Overview dashboard

#56005 @ghazalfamilyusa • Increase the cost of table scans in the cost model for scenarios with a high risk of suboptimal execution plans, making the optimizer prefer indexes #56012 @terry1purcell • TiDB supports statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual following aspects of SQL statements: • Security: Because parameters and statements are separated, the risk of SQL injection attacks is avoided. • Performance: Because the statement is parsed in advance on

statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual following aspects of SQL statements: • Security: Because parameters and statements are separated, the risk of SQL injection attacks is avoided. • Performance: Because the statement is parsed in advance on concatenating parameters into a SQL statement. However, this method poses a potential SQL Injection risk to the security of the application. To deal with such queries, use a Prepared statement instead of

statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual following aspects of SQL statements: • Security: Because parameters and statements are separated, the risk of SQL injection attacks is avoided. • Performance: Because the statement is parsed in advance on concatenating parameters into a SQL statement. However, this method poses a potential SQL Injection risk to the security of the application. To deal with such queries, use a Prepared statement instead of

statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual following aspects of SQL statements: • Security: Because parameters and statements are separated, the risk of SQL injection attacks is avoided. • Performance: Because the statement is parsed in advance on concatenating parameters into a SQL statement. However, this method poses a potential SQL Injection risk to the security of the application. To deal with such queries, use a Prepared statement instead of

Fix the issue that retrying prewrite requests in the pessimistic transaction mode might cause the risk of data inconsistency in rare cases #11187 – Fix the issue that GC scan causes memory overflow #11410 20:15:00'; before you execute the query. This makes less TiFlash queries encounter a lock and mitigates the risk of unstable query time. 8.14.4 Some queries return the Region Unavailable error If the load pressure files. [2020/11/30 15:25:17.252 +08:00] [WARN] [memory_usage_alarm.go:141] [" �→ tidb-server has the risk of OOM. Running SQLs and heap profile �→ will be recorded in record path"] ["is server-memory-quota

Fix the issue that retrying prewrite requests in the pessimistic transaction mode might cause the risk of data inconsistency in rare cases #11187 @MyonKeminta • PD • Fix the issue that evict-leader-scheduler statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual following aspects of SQL statements: • Security: Because parameters and statements are separated, the risk of SQL injection attacks is avoided. • Performance: Because the statement is parsed in advance on

statistical information TiDB uses statistical information to determine index selection. There is a high risk that the index is not correctly selected after a large volume of data is deleted. You can use manual following aspects of SQL statements: • Security: Because parameters and statements are separated, the risk of SQL injection attacks is avoided. • Performance: Because the statement is parsed in advance on concatenating parameters into a SQL statement. However, this method poses a potential SQL Injection risk to the security of the application. To deal with such queries, use a Prepared statement instead of

Next to v2.0.x, the new DM version is v5.3.0, and you can upgrade from v2.0.x to v5.3.0 without any risk. 41 • The default deployed version of Prometheus is upgraded from v2.8.1 to v2.27.1, which is released 20:15:00'; before you execute the query. This makes less TiFlash queries encounter a lock and mitigates the risk of unstable query time. 8.13.4 Some queries return the Region Unavailable error If the load pressure files. [2020/11/30 15:25:17.252 +08:00] [WARN] [memory_usage_alarm.go:141] [" �→ tidb-server has the risk of OOM. Running SQLs and heap profile �→ will be recorded in record path"] ["is server-memory-quota