Zabbix calculated item divide by zero

Zabbix calculated item divide by zero. While other trigger expressions as function parameters are limited to non-history functions in triggers, this limitation does not apply in calculated items. Calculated items share their syntax with trigger expressions. Jun 6, 2021 · Hi Team: I am generating a calculated item in Zabbix 5. The key is a unique item identifier (per host). I am trying to create a calculated item using this SNMPv1 value. radians: Converts a value from degrees to radians. Calculated items may be referenced by macros or other entities same as any other item type. rand: Return a random integer value. General design principles for the new syntax As simple as possible for new users of Zabbix Must support expressions as function parameters like func3(10*func1(), func2(), 123) Jun 29, 2018 · I am trying to create an item that is the sum of all the item X values for every host in a specific group. 1. 下面我们做个测试，来解决这个问题: 第一,建立一个测试的监控项: 第二,为监控项传值: Click on Items in the row of the host; Click on Create item in the upper right corner of the screen; Enter parameters of the item in the form; You can also create an item by opening an existing one, pressing the Clone button and then saving under a different name. Cannot evaluate expression [0/0]” Apr 16, 2020 · With calculated items, you can create calculations based on other items. Watch the video now. zero_division. The reason is given as "Cannot evaluate expression: division by zero. All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or Dec 27, 2016 · and this item shows 0 value, inspite of Access_switch2 cpu load (item . I have an agent check for "perf_counter[\DNS\Total Query Received]" for all the hosts in the group called "DNS" On each host, I have a calculated item using this Comment by Aleksandrs Saveljevs [ 2016 Feb 03] May be related to ZBX-4544. 000/0. Jan 30, 2020 · Could you please help me with a calculated item? He can't do the division. The values will be periodically calculated based on an arithmetical expression and done by the Zabbix server – nothing is performed on Zabbix agents or proxies. 0) shows max load is 65%. . Apr 21, 2016 · If you are having problems with Zabbix, post here. perf. Sep 16, 2022 · So, it takes change of total flush time, and divide by change of total flushes count (adding 1 if it iz zero). The value of this OID variable should be scaled by externalSensorDecimalDigits. Put the hosts into a group "mygroup" and then: grpmin["mygroup","temp1",last,0] If instead, you wanted the minimum of 3 items for the same host, don't do this in an item. vnx. Mar 12, 2020 · If a unit symbol is set, Zabbix will add post processing to the received value and display it with the set unit postfix. The highest value of the referenced item values. com/documentation/2. round: Round the value to decimal places. You can Feb 23, 2018 · Instead of adding yet another item (the calculated one), do the calculation right in the original item - set the custom multiplier to 0. Calculations may use both: single values of individual The values will be periodically calculated based on an arithmetical expression. Dec 4, 2013 · I have created few calculated Iems. I think the documentation is pretty clear, but somehow it isn’t working in my system. All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or Zabbix: handle calculated item with zero division. change(0)}/{item > 0. prev_value) Calculated items share their syntax with trigger expressions. hour Aug 8, 2019 · Is it possible to create a calculated item that calculates the sum of the last collected value of several items equal to zero? This is why our backup checks on a server return the exit code, and zero is successful. I wanted to divide two perf_counters: "perf_counter[\"\SQLServer:Access Methods\Index Searches/sec\"]"/ "perf_counter[\"\SQLServer:Access Methods\Full Scans/sec\"]". mod: The division remainder. 7 Calculated items Overview. Cannot evaluate expression [0. 4 with the following expression: 100- (last (//SwapFree)/last (//SwapTotal)) The problem is when the swap memory is equal to zero (SwapTotal = 0). However, when I tried creating a new aggregated item which is the ratio between two other aggregated items it didn't work. 8. What is wrong in my calculated item? Tags: calculated item , max cpu load Mar 9, 2019 · Hello Zabbix users, guru and creator, In a discovery context, I need complexes rules to manage sensors. We will discuss May 9, 2012 · Use this forum to ask questions about how to do things in Zabbix With calculated items you can create calculations on the basis of other items. 56. 7 Here are the working values: Mar 16, 2011 · My end goal is to calculate input and output port ethernet port utilization on our core switches, right now I am just trying to get the last function to work correctly. After that, check if you have any Red Cross over the list of Items in Host configuration and fix any Aug 18, 2018 · One scenario for item) and we would like to have a calculated item that represents the worst of these monitoring (meaning if at least one service is down the whole application is off ). zabbix. You can May 28, 2020 · Hi, the calculated item "ZFS ARC Cache Hit Ratio" with the key zfs. There is a "formula" field for an item object, but its type is int/float as stated in the document. Thus, calculated items are a way of creating virtual data sources. As an example. Jan 3, 2017 · I’m trying to create a calculated item from values in interface discovery, but I haven’t really figured out how yet. I tried to solve this by defining a bunch of constants in the Dashboard variables for each cluster I have. in that I have something like this. I would like an item to sum and alert if the total was less than the total backups. These two items are synchronized (push togheter), so they have the same time in zabbix server. Calculations may use both: single values of individual Hi, dears! Could you please help me with a calculated item? He can't do the division. To use calculated items, choose the item type Calculated. second item is calculated based on first item and its formula is : (abschange("KeyName"))/60 for example: if values of first item are these: 5,8,16,34,68,71,93,102, then second item must 計算アイテム(Calculated Items)とは、設定された計算式によって、他のアイテムから新たな値を生成することができるアイテムタイプです。 Zabbix 1. prev_value) In the item configuration you can click on preprocessing and use a customer multiplier to divide a value, but I am not sure if that what you want. Comment by Bart Dopheide [ 2016 Feb 03] 7 Calculated items Overview. 3. last_value - item1. For example, you may want to calculate the hourly average of some item value or to calculate the total value for a group of items. 0/manual/config/items/itemtypes/aggregate. Answer. The resulting data will be stored in the Zabbix database as for any other item - this means storing both history and trend values for fast graph generation. arcstats_hit_ratio has become unsupported on one of my monitored hosts. I have two items, the first one is the value, the second one is the decimal digit (The sensor reading as a signed integer. CALCULATED Itmes result = item1/Item2 but errot it was showing that Division by zero. You can everything: triggers, calculated and aggregated items. Their names : With calculated items you can create calculations on the basis of other items. The values will be periodically calculated based on an arithmetical expression. That might get you where you need to be. For example, if the Unlike trigger expressions, Zabbix processes calculated items according to the item update interval, not upon receiving a new value. Please report bugs here . power: The power of a value. We added the expression 'count("requests. 76 Kbps. Jun 29, 2021 · This syntax is very similar to that used in the Linux file system — it starts with the forward slash, then comes the host name, and the item key with the interval (including shifting) after the first comma. for example: if values of first item are these: 5,8,16,34,68,71,93,102, then second item must return: 3,8,18,34,. Zabbix acceptance Zabbix will support new syntax for trigger expressions, calculated and aggregated items. Calculations may use both: single values of individual Jul 5, 2018 · Hello, i'm trying to evolve the VMware ESX Standalone Template ans I have difficulties to create an item prototype calculated on Zabbix 3. Zabbix: handle calculated item with zero division. If the calculation result is a float value it will be trimmed to an integer if the calculated item type of information is Numeric (unsigned) . The Item tab contains general item attributes. previous. Otherwise, Zabbix alters the calculated item to "unsupported" if at least one item is not available or a division by zero appears and reactivates the item after the configured value for "Refresh unsupported items". prev_value) / (item2. Calculations may use both: single values of individual Jan 22, 2010 · It seems that all the pieces are there, it is possible to calculate a ratio in triggers, so Zabbix knows how to do that, and it also has the concept of aggregated items, which are calculated based on other items. That is what a calculated item is for. The first push the total number of invocation of the webservice and the second the total execution time. By default, if the raw value exceeds 1000, it is divided by 1000 and displayed accordingly. I think I can multiply all values (zero means out so the final product would be zero if at least on is out) in a calculated item to achieve this. Jan 18, 2022 · I have 2 items in zabbix version 5. For simplicity, let's write as: x := last("X") y := last("Y") c := count(Y,#1,0) The answer is in the documentation here http://www. With calculated items you can create calculations on the basis of other items. Calculations may use both: single values of individual With calculated items you can create calculations on the basis of other items. 9. To start viewing messages, select the forum that you want to visit from the selection below. 0125. 14159265358979). log” there is a error like “error: Division by zero. GitHub Gist: instantly share code, notes, and snippets. The formula is as follows: Key: varpop. last_value - item2. com One Item I used in zabbix is calculated, it ‘s formula is last("To_SAA-CSJCZ1_UDP-RTTSum") / last("To_SAA-CSJCZ1_UDP-NumOfRTT") But in the log file “zabbix_server. You may have to REGISTER before you can post. second item is calculated based on first item and its formula is : (abschange("KeyName"))/60. Configurable fields. DiskUtilization[{#DISKPERFDEV With calculated items, you can create calculations on the basis of other items. Which is probably not what expected :-) Which is probably not what expected :-) And here is what they should be: With calculated items you can create calculations on the basis of other items. See full list on zabbix. In case it is not possible another approach would be a calculated item with a comparator, for example {last(anotherkey) > 20 So while I can query those at the same time, when I come to do a Transform on that data the times don’t align so I get the infinity symbol appear which I’m assuming is a divide by zero. All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or 7 Calculated items Overview. zabbix的监控类型支持一种calculate的方式，可以对几个item结果进行简单的计算，但有时会出现分母为零的情况，这时候监控项就会报错 Cannot evaluate expression: division by zero. Problem. In addition, previously, we did have the aggregated items. first item as a trapper and it will be updated every one minute and Its value is ascending. last("X") * (1 - count("Y",#1,0)) / (last("Y") + count("Y",#1,0)) Reason. Calculated items may be used in trigger expressions, referenced by macros or other entities same as any other Sep 9, 2014 · All, I have 2 items collecting decimal data every minute. Error: Cannot evaluate expression: division by zero Item calculated: emc. So where do I put the formula needed by a calculated item?enter image description here Calculated items share their syntax with trigger expressions. 5 The problem however is in case when previous value is 0, we get division by zero Powered by a free Atlassian Jira open source If you use a custom multiplier or store value as Change per second for items with the type of information set to Numeric (unsigned) and the resulting calculated value is actually a float number, the calculated value is still accepted as a correct one by trimming the decimal part and storing the value as an integer; Jul 18, 2018 · I am familiar with creating a calculated item with the GUI, but now I want to do it with the API. min: The lowest value of the referenced item values. Configuration. 6. All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or Jan 18, 2022 · I have 2 items in zabbix version 5. signum 7 Calculated items Overview. 4. They are stored in delta (single change). time. A calculated item allows to create a calculation based on the values of some existing items. In Zabbix, calculating the variance is simple, since there is a specific formula for it via a calculated item. Aug 31, 2021 · In this video, we will learn how to perform calculations and utilize predictive functions by using collected data with Calculated item type. 000000] offcourse it 0/0 can't be divisible, But in this case for me expected result is '0' how can i make this work? how can i correct his? please advise. Want to create a calculated item with last("X") / last("Y") . All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or Sep 9, 2014 · All, I have 2 items collecting decimal data every minute. I have an SNMPv1 value that is working properly with the key name of ifspeed1. You can 7 Calculated items Overview. This was configured differently in earlier versions of Zabbix, see the corresponding version in the manual if using something older than 3. " With calculated items you can create calculations on the basis of other items. 1 からサポートされています。 ドキュメントにも利用例がいくつか掲載されていますが、 Nov 28, 2013 · For this, we send for each webservices 2 items trapper every 30 seconds. Jun 23, 2014 · Usually calculated item appeared after (Update interval of first element + Update interval of second element + . All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or Calculated items share their syntax with trigger expressions. For example, if you set bps and receive a value of 881764, it will be displayed as 881. response. The referenced item must be in a supported state (except for nodata() function, which is calculated for unsupported items as well). Error: Cannot evaluate expression: division by zero Item calculated: Feb 9, 2015 · If this is your first visit, be sure to check out the FAQ by clicking the link above. Instead, take a look at your item and set the (Type of information) to numeric float if you have not done so already. Thus, calculated items are a way of creating virtual data sources. So, I need to see incoming packets per second (pps) on all interfaces on a router. I am looking to create a calculated item to keep result of a calculation: (item1. I’m running Zabbix 2. All calculations are done by the Zabbix server - nothing related to calculated items is performed on Zabbix agents or The host and item key can be specified as /host/key. +Update interval of CALCULATED item) To make you more happy, change all Update intervals to 1 and wait for a couple of minutes. 2. I have created two calculated items and the 60 second or 1min value always stays zero Feb 9, 2018 · HI, I would like to know if is possible to create a calculated item representing the trigger status of another item ? For example, this new calculated item would value 0 if the trigger is not triggered and 1 otherwise. count",#1,0)' to prevent a division by zero. Comparison to strings is allowed in calculated items. md. When Y = 0, the result should be 0. Jul 11, 2023 · The variance is a way to calculate the dispersion of data, considering its average. The values Jan 8, 2011 · {item . Now, the same syntax is used for triggers and calculated items. pi: The Pi constant (3. nemsrp gehp pjct bqvcyj xauw jlhmof tesenl jud vxvi wpbhqysc