stdx::interval, a library for intervals on totally ordered sets Eric Hughes, Meadhbh Hamrick stdx::interval, a library for intervals on totally ordered sets Eric Hughes, Meadhbh Hamrick In brief stdx::interval stdx::interval implements the mathematical sense of an interval on a totally ordered set. The library reasons about intervals as sets, not as interval expressions. The library is header-only and targets under the MIT License. Features Predicates Membership. Determine if a point is a member of the interval as a set. Equality. Compares the intervals as sets, not as specifications. Operations Point comparison

setHandler(SIGSEGV, onFault); for(Function* f: functions) { f->setTrap(); } setTimer(interval); int r = stabilizer_main(argc, argv); return r; } void setTimer(int msec) { struct 1000) / 1000; timer.it_value.tv_usec = 1000 * (msec % 1000); timer.it_interval.tv_sec = 0; timer.it_interval.tv_usec = 0; setitimer(ITIMER_REAL, &timer, 0); } A Typical performance setHandler(SIGSEGV, onFault); for(Function* f: functions) { f->setTrap(); } setTimer(interval); int r = stabilizer_main(argc, argv); return r; } void setTimer(int msec) { struct

Output C Input A Input B Output C Matrix Multiplication 58 fern::Interval (x, C.R_start, C.R_start + C.R_len, len_x)( fern::Interval (y, C.C_start, C.C_start + C.C_len, len_y)( fern::Compute( fern::Producer( void gemm(Matrix A,Matrix B,Matrix C); fern::Interval (x, out.x_start, out.x_start + out.x_len, l fern::Interval (y, out.y_start, out.y_start + out.y_len, l fern::Compute( fern::Producer(Input fern::Producer(Input A Input B Output C Matrix Multiplication 59 fern::Interval (x, C.R_start, C.R_start + C.R_len, len_x)( fern::Interval (y, C.C_start, C.C_start + C.C_len, len_y)( fern::Compute( fern::Producer(

of the changefeed’s 41 sync-point-interval configuration. This change lets you align Syncpoints across multiple changefeeds that have the same sync-point-interval configuration, simpli- fying and improving the issue that CDC and log-backup do not limit the timeout of check_leader using the advance-ts-interval configuration, causing the resolved_ts lag to be too large when TiKV restarts normally in some cases N N Dynamic pruning Y Y Y Y Y Y E E E E Range COLUMNS partitioning Y Y Y Y Y N N N N N Range INTERVAL partitioning Y Y Y Y E N N N N N Convert a partitioned table to a non-partitioned table Y Y Y N

panic during the startup of PD microservices #8406 @HuSharp • Fix the issue that the split-merge-interval configuration item might not take effect when you modify its value repeatedly (such as changing Dynamic pruning Y Y Y Y Y Y Y E E E E Range COLUMNS partitioning Y Y Y Y Y Y N N N N N Range INTERVAL partitioning Y Y Y Y Y E N N N N N Convert a partitioned table to a non-partitioned table Y Y Y page. 2. In the SQL Editor > MySQL Session section, configure the DBMS connection read timeout interval (in seconds) option. This sets the maximum amount of time (in seconds) that a query can take before

reduce the impact of network jitter on perfor- mance by setting a smaller value to shorten the retry interval. 69 Configuration file or compo- nent Configuration parame- ter Change type Description TiDB TiFlash #9444 @windtalker • Tools • Backup & Restore (BR) • Fix the issue that the PITR checkpoint interval in monitoring abnormally in- creased when TiDB nodes stopped, which does not reflect the actual Dynamic pruning Y Y Y Y Y Y Y Y E E E E Range COLUMNS partitioning Y Y Y Y Y Y Y N N N N N Range INTERVAL partitioning Y Y Y Y Y Y E N N N N N Convert a partitioned table to a non-partitioned table Y Y

N N N N Dynamic pruning Y Y Y Y Y E E E E Range COLUMNS partitioning Y Y Y Y N N N N N Range INTERVAL partitioning Y Y Y E N N N N N Convert a partitioned table to a non-partitioned table Y Y N N N page. 2. In the SQL Editor > MySQL Session section, configure the DBMS connection read timeout interval (in seconds) option. This sets the maximum amount of time (in seconds) that a query can take before attribute: CREATE TABLE t1 ( id int PRIMARY KEY, created_at TIMESTAMP ) TTL = `created_at` + INTERVAL 3 MONTH; The preceding example creates a table t1 and specifies created_at as the TTL times- tamp

reduce the impact of network jitter on perfor- mance by setting a smaller value to shorten the retry interval. 64 Configuration file or compo- nent Configuration parame- ter Change type Description TiDB TiFlash #9444 @windtalker • Tools • Backup & Restore (BR) • Fix the issue that the PITR checkpoint interval in monitoring abnormally in- creased when TiDB nodes stopped, which does not reflect the actual Dynamic pruning Y Y Y Y Y Y Y Y E E E E Range COLUMNS partitioning Y Y Y Y Y Y Y N N N N N Range INTERVAL partitioning Y Y Y Y Y Y E N N N N N Convert a partitioned table to a non-partitioned table Y Y

There must be some n × 10F inside the permissible interval.Tejú Jaguá - Ⅰ n × 10 F ≅ m × 2E 2E There must be some inside the permissible interval. n × 10F If is bad, then two consecutive numbers before and after the permissible interval and thus, . F u v v − u = 10 F > 2E u vTejú Jaguá - Ⅰ n × 10 F ≅ m × 2E 2E There must be some inside the permissible interval. n × 10F If is bad, then two permissible interval and thus, . F u v v − u = 10 F > 2E The larger , the shorter . F n u vTejú Jaguá - Ⅰ n × 10 F ≅ m × 2E 2E There must be some inside the permissible interval. n × 10F If

Syncpoint 对齐。从 v8.2.0 开始，为 changefeed 创建的 Syncpoint 是 changefeed 的 sync-point-interval 配置的倍数。这个调整可以让你对齐具有相同 sync-point-interval 配置的多个 changefeed 的 Syncpoint，简化和提高了对齐多个下游集群的能力。 更多信息，请参考用户文档。 38 • TiCDC #17176 @ekexium – 修复 tikv-ctl 的 raft region 命令的输出中未包含 Region 状态信息的问题 #17037 @glorv – 修复 advance-ts-interval 配置未被用于限制 CDC 和 log-backup 模块中 check_leader 操作的 timeout， 导致在某些情况下 TiKV 正常重启时 resolved_ts lag 过大的问题 PARTITION Y Y Y Y N N N N N N 动态裁剪 Y Y Y Y Y Y E E E E Range COLUMNS 分区 Y Y Y Y Y N N N N N Range INTERVAL 分区 Y Y Y Y E N N N N N 分区表转换为非分区表 Y Y Y N N N N N N N 对现有表进行分区 Y Y Y N N N N N N N 2.3.8 统计信息