Questions tagged [performance-monitoring]
Questions about monitoring server hardware and software performance, or network performance.
530
questions
0
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48
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Undersubscribed ESXI host shows 100% CPU
I guess the question is more theoretical one. We have ESXI host with 48 Logical Cores (HT enabled, 24 real cores). We run 4 machines each provisioned with 8 vCpu. Each machine operates on 75% CPU on ...
- 175
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2
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88
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How to use top without interactivity?
I want to periodically monitor the CPU usage and plot in time series. Not having much knowledge, I plan to use the top command, something like this question (Monitor cpu usage (and perhaps memory ...
- 225
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1
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141
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Does frequent ping affect local network speed?
(Sorry for my english)
Hi, I am about to set up a monitoring server and wanted to know if pinging the network devices could significantly affect the speed of the local network.
I want to ping every ...
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0
votes
1
answer
289
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Is there any tool or any way to get all processes which are queued in windows?
Is there any tool or any way to get all processes which are queued in windows? i have value of CPU Queue very high
i have few apps running on server. the CPU Queue continue to reach sometimes 3000, ...
- 4,289
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27
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Measure Memory Requests to RAM (Linux)
How can I measure the number of requests per second issued (not MB/s) to RAM on Linux?
Background: DDR4-2933 purportedly can issue 2933.33 MT/s and I want to ensure a program completely saturates the ...
1
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0
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574
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kswapd0 jumps near 100%, freezes an EC2 t2.micro instance
I have an EC2 t2.micro instance that I use as a test instance for a web app,
OS: Ubuntu 22.04.1 LTS
the CPU consumption of kswapd0 the process jumps near 100% once in a while, causes a freezes of the ...
- 561
0
votes
1
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125
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Identifying source of memory drain on Windows Server 2019
Every Saturday night around midnight the server in question experiences a sudden loss of available memory. Over the course of about 35-40 minutes the available memory drops until the OS is unable to ...
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326
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How to monitor memory usage of all processes individually (in Windows)
I looked through the forum suggestions for my question but they were all Unix-based.
I'm trying to troubleshoot a Windows Server 2019 system that keeps locking up due to a "lack of resources"...
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-1
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1
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299
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Is there a way to monitor remotly multiple windows server for hardware performance? [closed]
We have 5 server installed as VM with "Windows Server 2016" on VMWware. These servers are configured as RDS, means multiple users are working on it. Users which are connected on these ...
- 107
0
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1
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253
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How to monitor ubuntu server resources consumption history
I'm working with a new web application installed on Ubuntu 20.04 server.
The web application is still in testing status and I need to check if the machine resources are enought during the day.
How can ...
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2
votes
1
answer
258
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Windows Server Command Line for Remotly Measure Data Disk IOPS,CPU,RAM Monitoring
I want to measure data usage like IOPS, CPU, RAM ,Capacity ,Bandwidth ETC from Remote Server.
I Know, that it is possible to measure it localy with the Typeperf Command.
However, again, i want to ...
- 133
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1
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805
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Comparision trigger in Zabbix
I got two items created for showing certain values. One of them is shoving value from today and the other one from week ago. How can I create trigger that compares them and alert when one of them is ...
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1
answer
417
views
Monitoring Byte Usage of Large MySQL InnoDB Buffer Pools?
I am trying to monitor the total number of used bytes in a MySQL 5.7 InnoDB Buffer Pool, that can go up to 100GB, using Innodb_buffer_pool_bytes_data but it seems that this status variable is a 32-bit ...
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308
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Apache crashing because of high memory usage
CPU[|||| 3.3%] Tasks: 71, 155 thr; 1 running
Mem[|||||||||||||||||||||||||||||||||||||||||||||||||1261/1875MB] Load average: 0.00 0.02 0.01 ...
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1
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1
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656
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How to write pidstat output to a sadc file for analysis later (sar)
How can I write the output of pidstat to a file for analysis later?
In sar, you can monitor usage and write-out to a file for later analysis using the -o argument. From the man page:
If ...
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1
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99
views
Obtaining the CPU L2 shared memory percentual of usage on Linux machine
On Linux based systems, how can I estimate or maybe read the CPU L2 shared memory % of usage?
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76
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What defines the "interval" when playing back Performance Co-Pilot data in pcp-atop?
I have PCP (Performance Co-Pilot) recording performance metrics on a RHEL 7 host. The recording cadence is set to Y seconds here:
/etc/pcp/pmlogger/control.d/local
When I copy the performance metrics ...
1
vote
1
answer
497
views
MySQL RDS Performance Insight got stuck
We are using AWS MySQL RDS. Quite recently, we are saw MySQL RDS Performance Insight got stuck with
SET `@slave_uuid` = ?
Like the following image
The second one that follows the above is
Use `...
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0
answers
87
views
Monitoring (summarizing) network usage of a single application (process) (Linux)
I have a single application that seems to be a network pig (based on a casual glance at its logs - it seems awfully chatty). I'd like to find out what its bandwidth usage is - preferably in the form ...
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1
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42
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Is there a program to diagnose and summarize why my mchine is slow? [closed]
Is there a program that will tell me why my server is slow? What is being over utilized? CPU / Memory / Disk / Network ... and what processes are driving that utilization? I want a program that can ...
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1
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155
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How can I isolate resources from a VM in VMware-Esxi to do load testing? [closed]
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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50
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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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1
answer
865
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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1
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199
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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 ...
google-cloud-platform
0
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1
answer
654
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 ...
- 257
1
vote
2
answers
121
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 ...
- 113
-1
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1
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3k
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 ...
- 161
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0
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44
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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1
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356
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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3
answers
2k
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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2
answers
103
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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138
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 ...
- 143
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1
answer
1k
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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1
answer
150
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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1
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0
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188
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 ...
- 111
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0
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795
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 ...
- 111
2
votes
1
answer
1k
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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2
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982
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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5
answers
4k
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/...
- 31
8
votes
1
answer
2k
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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3
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0
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1k
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
...
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votes
1
answer
3k
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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 ...
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1
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231
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 ...
- 618
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0
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106
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-...
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6
answers
14k
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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0
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1k
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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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68
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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0
answers
170
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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2
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752
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 ...
- 151
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votes
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738
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 ...
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