voltage and load. PingCAP TiDB • TiDB by HTTP - monitoring of TiDB server of TiDB cluster via HTTP; • TiDB PD by HTTP - monitoring of PD server of TiDB cluster via HTTP; • TiDB TiKV by HTTP - monitor TiKV TiKV server of TiDB cluster via HTTP. See setup instructions for HTTP templates. You can get these templates: • In Configuration → Templates in new installations; • If you are upgrading from previous Zabbix SNMP agent; • TiDB by HTTP - monitoring of TiDB server of TiDB cluster via HTTP (see setup instructions for HTTP templates); • TiDB PD by HTTP - monitoring of PD server of TiDB cluster via HTTP (see

floor, log, log10, mod, pi, power, radians, rand, round, signum, sin, sinh, sqrt, tan, truncate Operator functions between, in Prediction functions - String functions ascii, bitlength, bytelength, char from the current object/element; only definite paths are supported. @.name Supported operators: Operator Type Description Result - binary Subtraction. Number. + binary Addition. Number. / binary Division parameter or operator. A more complex formula may use a combination of functions, operators and brackets. You can use all functions and operators supported in trigger expressions. The logic and operator precedence

max, min, mod, pi, power, radians, rand, round, signum, sin, sinh, sqrt, sum, tan, truncate Operator functions between, in Prediction functions forecast, timeleft 282 Function group Functions String (/host/key,(sec|#num)<:time shift>,<operator>,) 295 FUNCTION Number of values within the defined evalua- tion period. See common parame- ters. operator (optional; must be double- (/host/key,(sec|#num)<:time shift>,<operator>,) 297 FUNCTION Number of unique values within the defined evalua- tion period. See common parame- ters. operator (optional; must be double-

function（函数）应用于监控项的一些参数。该函数返回一个与阈值比较后的结果，使用运算符和常数。 一个简单有用的表达式的语法是 function(/host/key,parameter)<operator>. 例如: min(/Zabbix server/net.if.in[eth0,bytes],5m)>100K 如果在最后五分钟期间接收到的网络字节数最小值超过 100 ))<... 或像 forecast(/host/item,(...))>... 此外，如果监控项值为负是正常的，则 -1 可能是有效的预测。但是在现实世界中这种情况的概率可以忽略不计 (看看 operator =如何工作)。因此，如果您想要或不想分别将 -1 视为问题，可以添加 ... 或 forecast(/host/item,(...))=-1 或... and forecast(/host/item 主机使用. TiDB by HTTP {$TIDB.PORT} - TiDB 服务器指标信息 web 端点的端口 (默认: 10080) {$TIDB.URL} - TiDB 服务器 UR (默认: localhost). 模板适用于 PingCAP TiDB 集群的 TiDB 服务器. 内部指标将从 TiDB /metrics 和 TiDB 监控 API 中采集. TiDB PD by

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from the current object/element; only definite paths are supported. @.name Supported operators: Operator Type Description Result - binary Subtraction. Number. + binary Addition. Number. / binary Division parameter or operator. A more complex formula may use a combination of functions, operators and brackets. You can use all functions and operators supported in trigger expressions. The logic and operator precedence result that is compared to the threshold, using an operator and a constant. The syntax of a simple useful expression is function(/host/key,parameter)<operator>. For example: min(/Zabbix server/net

from the current object/element; only definite paths are supported. @.name Supported operators: Operator Type Description Result - binary Subtraction. Number. + binary Addition. Number. / binary Division parameter or operator. A more complex formula may use a combination of functions, operators and brackets. You can use all functions and operators supported in trigger expressions. The logic and operator precedence result that is compared to the threshold, using an operator and a constant. The syntax of a simple useful expression is function(/host/key,parameter)<operator>. For example: min(/Zabbix server/net

count_foreach functions. • The count and count_foreach aggregate functions support optional parameters operator and pattern, which can be used to fine-tune item filtering and only count values that match given count_foreach functions. • The count and count_foreach aggregate functions support optional parameters operator and pattern, which can be used to fine-tune item filtering and only count values that match given current object/element; only definite paths are supported. Example: @.name Supported operators: Operator Type Description Result - Binary Subtraction Number + Binary Addition Number / Binary Division

from the current object/element; only definite paths are supported. @.name Supported operators: Operator Type Description Result - binary Subtraction. Number. + binary Addition. Number. / binary Division Division. Number. * binary Multiplication. Number. == binary Is equal to. Boolean (1 or 0). 183 Operator Type Description Result != binary Is not equal to. Boolean (1 or 0). binary Is less than. Boolean parameter or operator. A more complex formula may use a combination of functions, operators and brackets. You can use all functions and operators supported in trigger expressions. The logic and operator precedence