Questions tagged [performance-monitoring]

Questions about monitoring server hardware and software performance, or network performance.

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1answer
89 views

How can I isolate resources from a VM in VMware-Esxi to do load testing?

We have some web services running on a VM in VMWare-ESXi. We would like to see how the system behaves under certain amount of users. How can we configure the VM to provide accurate results without ...
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0answers
16 views

TTFB slow on EC2 instance until reboot. What is the cause and how can I monitor this with notifications?

I have a T2 micro on AWS EC2 running Ubuntu Linux. The response times have fine been for a long time. Tested some pages today and page load time was 20 seconds or longer. I checked the "st&...
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1answer
31 views

Double call to root path “/” in a website

I'm checking my web page performance, but some strange reason it double calls to root path. Any idea why this is happening? Thank you.
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1answer
80 views

Reducing idle CPU usage of Windows Server 2019 Datacenter Core VM

I'm moving a few installations to Windows Server Datacenter Core 2019 running in KVM VMs on Linux hosts. My first Windows VM has, when it's idle, a bit more than 32000 VM exits per second, half of ...
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1answer
57 views

Monitor the nginx deployed on GKE cluster

I want to monitor the nginx requests (5xx, 4xx, 3xx, 2xx) where multiple applications are running with different domain urls. Nginx is deployed as Kind : Deployment. Is there a way for real time ...
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1answer
39 views

Track outgoing bandwidth usage of single IIS website on my VPS

I want to track OUTGOING bandwidth consumption from a single website in IIS to my site visitors (no internal traffic), e.g. CSS, images, HTML. The reason is that I want to know which package would be ...
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0answers
55 views

Linux - performance stats and count instances of a process - log all to single line in text

I'm trying to analyse the performance of a file processing setup. Client is given files, sends to server for processing, records result and moves files into two folders depending on whether the file ...
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2answers
29 views

How to setup Server to Monitor Resource Usage Over Period of Time & Generate Report

I am working on a research project and we usually start a job on a server and it takes about a day or two to run and then we go and look back at the results. The problem is that in some cases we are ...
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1answer
563 views

The causes for frozen server

We built one windows 2012R2 server (it has enough free memory/disk space, high performance of CPU), but it would be frozen for around half hour every 12 hours. The symptoms: couldn't access the ...
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0answers
15 views

Apache processes consuming to much memory

Am suspecting apache is consuming too much memory on my server,, Here is a screenshot for htop The is lots of calls to /usr/bin/apache2 -k start , why too many calls to start apache while apache is ...
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0answers
32 views

Determine number of Kubernetes CPUs utilised over time

I have spent a bit of time in Kubernetes monitoring on GCP (https://cloud.google.com/stackdriver/docs/solutions/gke/observing) and cannot find where to see how many CPUs were used by a particular ...
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0answers
10 views

Comparing perf-tool's bitesize vs sar -d output's avgrq-sz

Here are two outputs from the same time. sar -d -p 10:14:19 AM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util 10:14:20 AM sdc 0.00 0.00 ...
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1answer
30 views

How to load one physical CPU in a system with virtual cores?

I have an AMD processor with 4 physical cores and SMT enabled. Because of the latter, I see 8 virtual cores in a Linux box. For example, stress command can spawn a number of workers spinning on sqrt()....
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1answer
196 views

NVMe disk problems - smartctl 0x2002 status

My NVMe disk works but it is very slow compared to what it was. I benchmarked it 6 months ago at 2000MB/s using fio, the exact same test now is giving me 350MB/s I ran smartctl but it's giving a ...
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2answers
90 views

Is it “common” for an IT department to provide a Network SLA to the business internally? [closed]

Service Level Agreements (SLAs) are pretty common when services are being purchased, we all expect that our business grade ISP, cloud providers, etc will offer a guarantee of 99.9% uptime, X amount of ...
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0answers
25 views

Can I use wildcard in Performance Monitor on windows server?

I have a batch job which has performance issue, I would like to use Performance monitor to get some information. the troubles are: this job could start between at 1 am - 3am , I would like to avoid ...
0
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1answer
44 views

Can Performance Co-Pilot serve as a standalone NMS solution?

I was wondering whether Performance Co-Pilot (PCP) be set up in the way that it has all the features of NMS application, ie. Nagios or Zabbix. I was using it to extract metrics from a host and plot ...
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1answer
219 views

pidstat: difference between task and process?

The pidstat command has options relating to tasks and others relating to processes (e.g. -C and -G). What's the difference?
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1answer
56 views

ESXi (Free Versions) Notifications when there is sustained high CPU usage

I'm looking for a way to have the free version of ESXi notify me (Email is fine) when CPU usage is over 60% for at least 60 minutes. Generally, my CPU usage is around 25%. If it stays high for a ...
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0answers
44 views

Monitor performance of IIS UrlRewrite Extensibility Sample SQL Custom Rewrite Provider

I've implemented the SQL provider from IIS UrlRewrite Extensibility Samples and it seems to work well, but I'm wondering about the performance impact of IIS calling a stored procedure on an Azure SQL ...
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0answers
40 views

Variance in memory reported with perfmon vs Task Manager in Windows

I am recording Memory\% Committed Bytes In Use with perfmon every 15 seconds but I see that it doesn't always tie to task manager's reported memory %. They almost always tie but when memory starts to ...
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0answers
493 views

Monitoring SLA/SLO/SLI using Prometheus

I have done much research about monitoring SLI metrics with Prometheus. I have found only how to monitor a cluster using Kubernetes. I'm hoping to find a response here for simple monitoring. I also ...
2
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1answer
634 views

AWS CloudWatch alarm not populating data points - Insufficient state always

I am configuring CloudWatch alarm from the custom metric. Custom metric for disk space is configured, and I can see that every 5 minutes I am able to see the data. But when I set the alarm, the data ...
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1answer
357 views

Slow initial connection to database (php / mssql)

Our webserver and database server are on a local network and the webserver uses an IP address to connect to the database. $con = new \PDO('sqlsrv:Server=10.200.2.1\sql2017;Database=dbname, $user, $...
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4answers
2k views

Rsync to /dev/null overwrites it

I am seeing a random behavior when copying from one server to another using rsync to the /dev/null of the destination server. This is as part my network performance testing, and I want to avoid Disk I/...
8
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1answer
473 views

How to record and replay htop?

TL;DR Is there an option to run htop in a way that will generate some report and the load it using htop later? Similar to perf record and perf report. I'm a big fan of htop. I use it quite a lot when ...
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0answers
55 views

How can I count EC2 instances over time in AWS?

I want to know the number of EC2 instances I have running over time. I am able to view this data from the following menu: ec2 dashboard Auto Scaling Groups select my group from the table of groups ...
3
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1answer
1k views

how to gracefully kill linux perf tool process

I'm trying to use the linux performance tool perf to monitor kvm events on a host where a guest VM exists. The command I invoke perf is perf kvm stat record After some time, I'll press Ctrl + C to ...
0
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1answer
136 views

How to identify the source of growing blocked processes on a system container (LXC/OpenVZ)

When the number of blocked processes grow indefinitely, how to identify exactly what are these processes. Since I'm inside a system container (LXC/OpenVZ), I can't modify the hosts' kernel modules to ...
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0answers
42 views

Profiling CPU, memory, networking performance and generating reports

Background I have a performance-intensive (i.e. consumes a lot of CPU cycles, memory, and network resources) application. Multiple instances of this application, along with some third-party vendor-...
19
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6answers
9k views

Why the discrepancy between Speedtest and Wget?

My customer complains about low internet speeds. When measured with Speedtest.net speeds are acceptable. Periodic measured downloads are 10% to 30% of the nominal speed. I cannot explain that. Some ...
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0answers
729 views

Unexplainable high load average on a QNAP NAS

we have two QNAP TS-1635 NASes (one per location), running at identical configuration and firmware versions. However, one of them has ever higher and higher load averages and actually needs to be ...
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0answers
44 views

Icinga configuring error

After configuring Icinga host list in host conf i got error like root@server scripts]# icinga2 feature list Disabled features: api gelf influxdb opentsdb Enabled features: checker command compatlog ...
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0answers
82 views

High wa but no IO usage

My VPS is having extremely high wa (around 90), but there is no IO usage taking place. htop: iotop: nethogs: What can be the problem here?
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2answers
396 views

Can a high load on a VPS be caused by the underlying infrastructure?

My VPS started to have random stints of high load (around 2-3, but the system becomes extremely slow, running ls takes like 30 seconds). I hadn’t changed anything on it, there was pretty much nothing ...
3
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0answers
230 views

How to get PCI Tx/Rx byte counters?

I know how to read statistics about the configured network interfaces, for example via cat /proc/net/dev. Is there a way to read similar byte counters of PCI or PCIe traffic? Apparently, according ...
1
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1answer
3k views

Windows Performance Monitoring - “Packets Received Discarded” Never Changes

I wrote the following short PowerShell script to help diagnose some performance issues on a server: $counters = @("\Process(*)\% Processor Time","\Process(*)\Working Set","\Process(*)\IO Read Bytes/...
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5answers
1k views

Configure JMeter to test a proxy service

I have developed a proxy service using ballerina language by referring the following [1] and [2]. It works perfectly fine. Now I want to run a load test via JMeter. That is JMeter should be configured ...
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2answers
1k views

How to backtrace slowness of a shared hosting web server

I have a shared hosting plan (godaddy), and time to time I suffer slowness problem. When this happens, I try to login to cpanel to double check if the problem is me or the server, and it also takes 1-...
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0answers
32 views

How to sort the system calls by frequency generated by the perf command?

I have collected the perf syscall events using the perf tool by executing the command perf record -F 99 -e 'syscalls:*' -p <pid> The perf report command displays the system calls and its ...
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2answers
68 views

Can Perfmon be configured to survive a hard-reset or flush reports on the go?

I am having trouble configuring perfmon here (Windows Server 2016 if it's relevant). My situation: our server recently get random hit and we are diagnosing the problem, so I put a Data Collector Set. ...
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1answer
1k views

iperf3 UDP not reliable with iptables drop random

I'm performing some local test on my network with iperf3 using UDP connections between 2 Ubuntu 18.04 hosts. But it seems that the UDP iperf3 connections it is not robust to support a random packet ...
3
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1answer
2k views

How to get load average in Windows

In linux by "uptime" command you can get the load average in last 15 minutes. But how to get that in windows? Many had suggested alternative found here. But it is about CPU utilization where load ...
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2answers
1k views

docker container linux-tools-generic package

My goal is to use perf to run performance tests on some Docker images. By default, the images I'm using don't come with perf. As such, I tried apt-get update apt-get install linux-tools-generic to ...
0
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1answer
41 views

What's the significance of the *initially* displayed data when launching atop?

I've just started using atop to try to get to the bottom of some system bottlenecks. I've found https://linux.die.net/man/1/atop which is very useful and explains most of what it does just fine. ...
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1answer
47 views

Azure reporting metrics via powershell driving the Stop-AzureRmVM command

Good afternoon all, I am apparently in search of a unicorn. I've been through Azure Metrics, not wide enough... I've been through automation and the automation library... nada I have a basic ...
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3answers
11k views

sar: enable data collecting

I've just installed the sysstat package on Manjaro. When running sar for the first time I see: Cannot open /var/log/sa/sa21: No such file or directory Please check if data collecting is enabled How ...
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1answer
2k views

Docker performance monitoring - how to query I/O busy time and exact block reads/writes?

The "docker stats" command provides some basic info about containers. For example: CONTAINER ID NAME CPU % MEM USAGE / LIMIT ...
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0answers
170 views

Cant remote manage server “Access is denied”

Im trying to work with performance monitor on windows server 2016 core. I have my PC a VM a new or was atleast new Installation of server core and i got some other VMs running. All im trying to do is ...
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1answer
1k views

Performance monitor access is denied

I've been seaching for about the last 5 hour about perforamce monitor and how it works, and it has been a pain. I'm trying to get Performance monitor working on Windows Hyper-v Server 2016. I also ...

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