Perf 數據表的查詢
如需在 Azure 入口網站 中使用這些查詢的相關信息,請參閱Log Analytics教學課程。 如需 REST API,請參閱 查詢。
非 RDMA 活動
檢視叢集中節點的非 RDMA 活動。
//Select your log analytics workspace and replace enter nodename with the name of the node within a cluster on which you want to set the alert for Non-RDMA activity
Perf
| where ObjectName == "Network Interface"
| extend Nodename= tostring(split(Computer, ".")[0])
| where Nodename =~'enter nodename'
| summarize NetworkUsage = sum(CounterValue), Nodename = any(Nodename) by TimeGenerated
| summarize arg_max(TimeGenerated, Nodename, NetworkUsage)
RDMA 活動
檢視叢集中節點的 RDMA 活動。
//Select log analytics workspace and replace enter nodename with the name of the node within a cluster on which you want to set the alert for RDMA activity
Perf
| where ObjectName == "RDMA Activity"
| extend Nodename= tostring(split(Computer, ".")[0])
| where Nodename =~'enter nodename'
| summarize RdmaUsage = sum(CounterValue), Nodename = any(Nodename) by TimeGenerated
| summarize arg_max(TimeGenerated, Nodename, RdmaUsage)
會收集哪些資料?
列出收集的性能計數器和物件類型(Process、Memory、Processor)。
Perf
| summarize by ObjectName, CounterName
記憶體和 CPU 使用量
繪製過去一小時內所有計算機使用的記憶體和CPU圖表。
Perf
| where TimeGenerated > ago(1h)
| where (CounterName == "% Processor Time" and InstanceName == "_Total") or CounterName == "% Used Memory"
| project TimeGenerated, CounterName, CounterValue
| summarize avg(CounterValue) by CounterName, bin(TimeGenerated, 1m)
| render timechart
過去一天的CPU使用量趨勢
依百分位數計算所有計算機的CPU使用量模式。
Perf
| where ObjectName == "Processor" and CounterName == "% Processor Time" and InstanceName == "_Total"
| summarize percentiles(CounterValue, 50, 90, 99) by bin(TimeGenerated, 1h)
| render timechart
前 10 部具有最高磁碟空間的電腦
顯示前 10 部具有最高可用磁碟空間的電腦。
Perf
| where CounterName == "Free Megabytes" and InstanceName == "_Total"
| summarize arg_max(TimeGenerated, *) by Computer
| top 10 by CounterValue
會收集哪些資料?
列出收集的效能計數器和物件類型(行程、記憶體、處理器...)
Perf
| summarize by ObjectName, CounterName
虛擬機器可用記憶體
將一段時間的 VM 可用記憶體繪製成圖表。
// To create an alert for this query, click '+ New alert rule'
Perf
| where ObjectName == "Memory" and
(CounterName == "Available MBytes Memory" or // the name used in Linux records
CounterName == "Available MBytes") // the name used in Windows records
| summarize avg(CounterValue) by bin(TimeGenerated, 15min), Computer, _ResourceId // bin is used to set the time grain to 15 minutes
| render timechart
繪製 CPU 使用率趨勢圖表
計算過去一天的 CPU 使用率模式,依百分位數繪圖。
// To create an alert for this query, click '+ New alert rule'
Perf
| where CounterName == "% Processor Time"
| where ObjectName == "Processor"
| summarize avg(CounterValue) by bin(TimeGenerated, 15min), Computer, _ResourceId // bin is used to set the time grain to 15 minutes
| render timechart
// Perf table stores performance counters for Windows and Linux computers
// Counters are specified using ObjectName (performance object), InstanceName and CounterName
// % Processor Time captures CPU activity, ObjectNames can be Processor, Process and Process Information
虛擬機器可用磁碟空間
顯示每個執行個體的最新可用磁碟空間報告。
// To create an alert for this query, click '+ New alert rule'
Perf
| where ObjectName == "LogicalDisk" or // the object name used in Windows records
ObjectName == "Logical Disk" // the object name used in Linux records
| where CounterName == "Free Megabytes"
| summarize arg_max(TimeGenerated, *) by InstanceName // arg_max over TimeGenerated returns the latest record
| project TimeGenerated, InstanceName, CounterValue, Computer, _ResourceId
依 CPU 使用率的前 10 名虛擬機器
在過去 7 天內依 CPU 使用率尋找前 10 部 VM。
Perf
| where TimeGenerated > ago(7d)
| where CounterName == "% Processor Time" and InstanceName == "_Total"
| project TimeGenerated, Computer, ObjectName, CounterName, InstanceName, round(CounterValue, 2)
| summarize arg_max(TimeGenerated, *) by Computer
| top 10 by CounterValue
最低前 10 個可用磁碟空間百分比
最後 10 部可用磁碟空間 % 由電腦,過去 7 天。
Perf
| where TimeGenerated > ago(7d)
| where (ObjectName == "Logical Disk" or ObjectName == "LogicalDisk") and CounterName contains "%" and InstanceName != "_Total" and InstanceName != "HarddiskVolume1"
| project TimeGenerated, Computer, ObjectName, CounterName, InstanceName, CounterValue
| summarize arg_max(TimeGenerated, *) by Computer
| top 10 by CounterValue desc
容器 CPU
檢視平均超過 30 分鐘的所有容器 CPU 使用量。
// To create an alert for this query, click '+ New alert rule'
//Select the Line chart display option: can we calculate percentage?
Perf
| where ObjectName == "K8SContainer" and CounterName == "cpuUsageNanoCores"
| summarize AvgCPUUsageNanoCores = avg(CounterValue) by bin(TimeGenerated, 30m), InstanceName, _ResourceId
容器記憶體
檢視平均超過 30 分鐘間隔的容器 CPU。
// To create an alert for this query, click '+ New alert rule'
//Select the Line chart display option: can we calculate percentage?
let threshold = 75000000; // choose a threshold
Perf
| where ObjectName == "K8SContainer" and CounterName == "memoryRssBytes"
| summarize AvgUsedRssMemoryBytes = avg(CounterValue) by bin(TimeGenerated, 30m), InstanceName, _ResourceId
| where AvgUsedRssMemoryBytes > threshold
| render timechart
實例平均 CPU 使用量從上周成長
依實例在上周依遞減順序顯示平均 CPU 成長。
// To create an alert for this query, click '+ New alert rule'
//Show which instances grew CPU usage from last week to current
Perf
| where TimeGenerated > ago(7d) //This week Average CPU Usage Nano Cores
| where ObjectName == "K8SContainer" and CounterName == "cpuUsageNanoCores"
| summarize ThisWeekAvgCPU = avg(CounterValue) by InstanceName, _ResourceId
| join kind= leftouter (
//Previous week Average CPU Usage Nano Cores
Perf
| where TimeGenerated > ago(14d) and TimeGenerated <= ago(7d)
| where ObjectName == "K8SContainer" and CounterName == "cpuUsageNanoCores"
| summarize PrevWeekAvgCPU = avg(CounterValue) by InstanceName, _ResourceId
) on InstanceName, _ResourceId
| extend InstanceNameParts = split(InstanceName, "/") //array of the parts of the instance name
| extend ShortInstanceName = InstanceNameParts[(array_length(InstanceNameParts)-1)] //extract the last part of the instance name
| extend ThisWeekAvgCPU = round(ThisWeekAvgCPU,0)
| extend PrevWeekAvgCPU = round(iff(isempty(PrevWeekAvgCPU),0.0,PrevWeekAvgCPU),0) //When doing join with kind=leftouter, missing matches has empty value. To calculate growth, it should be converted to zero. In this case, empty value means that instance did not exist in the previous week
| extend AvgCPUGrowth = round(ThisWeekAvgCPU - PrevWeekAvgCPU , 0) //Calculate growth
| project-away InstanceName1,InstanceNameParts //Remove redundant fields
| order by AvgCPUGrowth desc
在 Perf 中尋找
在 Perf 中尋找以搜尋 Perf 資料表中的特定值。/nNote 指出此查詢需要更新 <SeachValue> 參數以產生結果
// This query requires a parameter to run. Enter value in SearchValue to find in table.
let SearchValue = "<SearchValue>";//Please update term you would like to find in the table.
Perf
| where * contains tostring(SearchValue)
| take 1000