Questions tagged [performance]
Questions about server hardware and software performance, or network performance.
577
questions with no upvoted or accepted answers
0
votes
0
answers
677
views
Intermittent delay sending MSMQ message across network
I'm experiencing an intermittent problem when sending an MSMQ message from one server to another, where the message is sent from one service, but is not received by the consumer for up to 30 minutes.
...
- 101
0
votes
1
answer
78
views
VPS high traffic load
Hello everyone I am really new on this topic so most of my questions will be trivial.
I buyed a VPS from godaddy which has 4 CPUs 8GB Ram and 200 GB HDD. I set up a one domain and upload my web site ...
- 101
0
votes
1
answer
2k
views
KVM-QEMU Windows Guest Memory Speed
How to speed up memory in Windows guest running on KVM-QEMU hypervisor?
The memory speed differs between Ubuntu guest and Windows 2016 Server on the same node quite a lot. Same benchmark tool counts ...
- 1
0
votes
0
answers
20
views
How can I further improve Oracle 12.1 performance on RDS m4.large instance?
I'm having performance issues with my current Oracle setup. Queries are taking half a second and I can't figure out how to speed it up further.
I've upgraded my RDS instance from a t2.medium to m4....
- 1
0
votes
0
answers
561
views
SSD performance on Ubuntu + Nginx
I'm trying to improve the performance of server for nginx 100TB/month images distributions. But I have two problems: high CPU load and periodical splashes (I don't know why)
Hardware is quite poor (...
- 103
0
votes
0
answers
451
views
Is it worth using Nginx as an SSL/TLS terminator in front of Varnish, rather than just Nginx itself as a cache?
First off, as I understand it, Varnish Cache is only a HTTP accelerator, and thus does not support client-side or server-side (backend) connections over HTTPS, despite the existence of this whitepaper....
- 121
0
votes
1
answer
2k
views
Need help increasing performance of logstash
We are in the process of deploying an ELK stack and need advice and general recommendations regarding the performance of the cluster and more specifically, logstash.
So the current setup we have now ...
- 153
0
votes
1
answer
607
views
MySQL perf bad on SSD-based server. Small tables. MySQL config? RAID?
I have a couple of servers in an industrial setting (air-gapped network) that do some fairly light telemetry gathering. We generate about 10GB of telemetry history in ~30 days.
All telemetry goes ...
- 31
0
votes
1
answer
2k
views
Slow apache response time for json api (solved)
I've got an Apache server hosting several json APIs.
This server is running Ubuntu 16.04.4 LTS with Apache and Mysql.
Response times for all API are very good except for one! It takes about 5s to ...
- 1
0
votes
1
answer
132
views
GCE Persistent SSD disks allocate more IOPS than specified
I've been testing GCE and created a VM with a persistent SSD disk to test disk performance. Persistent SSD disk that I configured was 37GB, which was supposed to give me 1110 IOPS but when I run ...
google-cloud-platform
0
votes
0
answers
141
views
File Server performance with simultaneous read/write operation
I have a WORKGROUP network with 50+ devices, all the computers can access a Windows Server 2008 R2 server which hosts all the media in the network. When one or some of the users are copying files from ...
- 153
0
votes
0
answers
358
views
Server too slow due to DNS resolution issue
I have installed LAMP on Ubuntu 14.04.5 LTS on Digital Ocean Server.
The issue I am facing from last two weeks is:
The site becomes too slow(or say does not load for 5 minutes) at irregular intervals....
- 101
0
votes
0
answers
6k
views
OpenVPN slow over UDP
I am trying to create a site-to-site connection using OpenVPN. The setup in general is operative: I can reach all servers from every node in each network. The bandwidth within networks is high (>1Gbps)...
- 290
0
votes
0
answers
228
views
Why do I have very different read speeds at the same SSD?
In a Debian stretch, I did some quick tests for a 500GB Samsung SSD 840 read speed at all the different partitions and I cannot understand the results. My understanding so far was that the disk could ...
0
votes
0
answers
300
views
virtual machine performance issue
I have a customer with a virtual solution... a pair of session host servers, an exchange server, pair of domain controllers etc.
They reported the servers were misbehaving earlier today.
We couldn't ...
- 541
0
votes
1
answer
289
views
What factors affect the speed of a VPN connection?
What hardware/software factors affect the speed of a VPN connection between two computers (1 Gbps network cards) on a lan with just a 1 Gbps switch between them ?
More vague : Is it possible to ...
- 123
0
votes
0
answers
45
views
Switching application from SQL Auth to Windows Auth causes connection queing under stress
We're switching from using SQL auth to windows auth per microsoft best practices (https://support.microsoft.com/en-ca/help/2028697/recommendations-and-guidelines-on-configuring-the-authentication-mode)...
- 619
0
votes
1
answer
533
views
Server performance affected by MySQL memory consuption and CPU usage
Everyday during the peak time my server getting slow or down. Our hosting provider insisting us to upgrade the server but I think some performance tuning issue is there.
Adding the process ...
- 1
0
votes
0
answers
1k
views
Nginx SSL config is slow
I'm having some issues with my SSL configuration being slow. Generally, my site responds in under 125ms when I'm connecting via HTTP, but over 400ms when connecting over HTTPS. I've tried tweaking the ...
- 135
0
votes
1
answer
460
views
ieprf vs iperf3 metrics does not match
I am not a network expert but I was measuring the network between to physical hosts using iperf and I got different results depending of the version I was using.
Server configuration:
CPU:
...
- 205
0
votes
1
answer
78
views
What faster proxy_pass or redirect to resource
I transfer my website to new webserver, without assets. I have flolowing links: site.com/img/image.png on new website but now, it's got 404 error
also I have old server with images on the same paths, ...
- 101
0
votes
0
answers
371
views
centos dedicated server backup strategy for mongodb and elasticsearch db
I have a main server (dedicated CentOS 7, XFS file system, 2X1TB SSD, software RAID1) connected via LAN to my backup server (dedicated CentOS 7, XFS file system, 2X2TB HDD, software RAID1) in my setup....
- 117
0
votes
2
answers
169
views
cpufrequency on Debian 8 (Jessie)
I'm running a database benchmark (TPC-H) and because of this, I need my processor not to have variable-speed. I know there are modes:
Powersave
Conservative
Ondemand
Usespace
Performance
On S.O. Red ...
- 101
0
votes
0
answers
81
views
Analyze performance issues, client, server, and database without source code?
I work in a support and have now found performance problems from a customer. There is a Windows client application where the customer works in that communicate with a Windows Server and a MS SQL ...
- 95
0
votes
1
answer
941
views
svchost suddenly overloading CPU on many servers
it seems that on many servers (w2k8 and w2k12) in our environment suddenly svchost hosting Dhcp, EventLog, lmhosts, Wcmsvc services started to use 1 CPU core by 100%. Sometimes it is also WmiPrvSe. It ...
- 157
0
votes
0
answers
147
views
Cannot get performance improvement with Haproxy
I have 4 web servers with a ruby web server running, and a server running haproxy.
I can get a RPS(request per second) of 300 against one web server using ab.
But I can only get a RPS of 340 against ...
- 459
0
votes
1
answer
341
views
Backuppc performance dropped dramatically
I've got a tiny server in my house which I use for file server and hosting test web sites for my clients, among other things. It uses backuppc for backups. The machine is a MSI Cubi N, backing up to a ...
- 553
0
votes
1
answer
964
views
How can I identify the cause of packet loss in DNS?
We have upgraded some of our routers to Ubuntu 16.04 and are now getting some performance problems with DNS. It seems that packets are sometimes truncated, but I have no clue what else I can do:
This ...
- 187
0
votes
1
answer
517
views
Syslog-NG is spooling messages
I am currently using Balabit's Syslog-NG to concentrate my IT logs and convey them in a remote server, via a TCP connection, which can allow one listening port only.
Thing is, my log volume is really ...
- 498
0
votes
1
answer
90
views
Server appears to have little free memory despite apparent low memory usage in userspace
A Linux server I administer has been experiencing serious performance degradations as of late, becoming particularly apparent several weeks after each time it is rebooted. In particular Jenkins jobs ...
0
votes
0
answers
43
views
Find out which process blocks my server
I have a VPS with some Docker containers running, and something strange happens about once a day:
The server stops responding to anything (ping, cloud, ssh, mail, etc.) and when I go to the cloud ...
- 191
0
votes
1
answer
153
views
EXPLAIN (BUFFER,ANALYZE) understading
I am using PostgreSQL 9.3
Can some one help me what i can do to improve this.
The max number of records in db table is approx 5000 to 7000 varies daily basis.
shared_buffers setting in PGsql DB is =...
- 3
0
votes
1
answer
3k
views
Windows file server got slow response and high latency even ping localhost by running about 7 days after rebooting
We have a file server of Windows Server 2012 R2 on DELL PowerEdge R720, and get a very weird issue in recent days about network/disk performance. The box have a RAID-1 disk group for OS (disk0) under ...
0
votes
0
answers
518
views
The fio shows iops very less for CentOS6.0 vm running in kvm with backend disk SSD
Disk "iops" is very less with "fio" disk benchmark tool for CentOS 6.0 virtual machine running on KVM. When I execute same on CentOS 6.7 and CentOS 7.2, the iops is as expected. ...
0
votes
1
answer
229
views
Performance issue on drupal
I am running a drupal 7 website on a Linux server (with 4 cores and 12GB RAM) with LEMP (nginx+php5-fpm+mysql).
The drupal installation has a large number of modules enabled(all of which are needed).
...
- 1
0
votes
1
answer
170
views
Performance drop with Xeon v4 procs
So I have a bit of a mystery. We have an in-house built video processing application that is, naturally, very process intensive. I got my hands on a server with 2x E5-2640v3 processors and I was able ...
- 195
0
votes
1
answer
690
views
Why is Haproxy hitting (variable) connection limits?
I'm trying to understand some numbers I'm seeing as well as why Haproxy seems to be hitting variable limits on requests/s.
The test set up is pretty straightforward:
20 backend servers running on ...
- 101
0
votes
0
answers
256
views
Not sure if high response time is caused by uploading images
Log:
439 <158>1 2016-11-06T15:45:55.783260+00:00 heroku router - - at=info method=PUT path="/api/users/1770954736492550?GciOiJIUzI1NiJ9.eyJ1aWQiOiIxNzcwOTU0NzM2NDkyNTUwIn0.HwT1Di67QLhaZD2jOnV-...
- 113
0
votes
1
answer
125
views
Internet routing through linux speeds down
I'm having the most odd problem:
I'm providing internet routing for a network of pcs through a server based on linux. I used a broadband modem and everything worked fine.
Now, to the question, I got ...
- 1
0
votes
1
answer
42
views
Riak CS - Number of replicas
From the official Riak documentation: "In a Riak CS system, any node can respond to client requests - there is no master node and each node has the same responsibilities. Since data is replicated (...
- 439
0
votes
0
answers
402
views
RDS performance on alter table
I'm doing some performance testing on RDS with MySQL 5.5 My test consists of running liquibase changesets (mostly alters, some updates, some create table) on big table ( most tables have millions of ...
0
votes
1
answer
88
views
SBS 2011, Server Performance plunged after activating administrator account
After activating the built in "administrator account" on a SBS 2011 server, the performance of the server went down to almost un-usable in the GUI. Can log on as another user, but performance is ...
- 1
0
votes
0
answers
631
views
How much cpu (and RAM) is used to rebuild an Intel RSTe RAID 5 (firmware/bios/fake)?
Let's say I have a dual CPU system with:
2 x Intel Xeon E5-2667 v4 3.20GHz 25MB Cache
3 x 1TB SATA3 Seagate Enterprise class in RAID5 on the Intel C612 RSTe Controller
Total final storage is: 2TB
...
- 101
0
votes
0
answers
638
views
OpenVPN: Weird file transfer issues
I am having issues with OpenVPN while transferring a file through the SMB protocol.
The issue is that the speed begins high for the file transfer, goes down and then it keeps going up and down at ...
0
votes
0
answers
3k
views
ESXi Guest OS network transfer rate slow?
TLDR = I have proven data transfer from virtual machines to physical machines is a fraction of what it is from physical machine to physical machine. ESXi boasts "gigabit adapters" so, it seems it ...
- 348
0
votes
1
answer
983
views
Measure total wait time for a Windows executable
I am looking for a way to evaluate the degree to which performance is an issue for a certain application used by numerous users working on Windows Server 2003.
I know Windows 10 allows to display a ...
0
votes
0
answers
82
views
Remote server is ping-able but unreachable via TCP/UDP - how to debug?
I'm running a Debian Jessie server hosted by a company (so I only get to access it remotely) with several LXC based virtual machines running on it which in turn run several services from XMPP to IMAP, ...
- 141
0
votes
1
answer
325
views
Performance comparison of single RAID vs multiple filesystems
I'm trying to get maximum sequential disk throughput for an application on my Linux server. It has 7 SATA disks that I could put in one RAID0 or RAID5 using a hardware RAID controller (HP P420i). Or, ...
- 337
0
votes
0
answers
84
views
Gathering Performance Metrics (RAM, CPU, etc) AWS & Azure
We're developing a cross cloud plane performance metric harvester, to collect various performance metrics, but the top 3 being RAM usage, CPU Utilization and Disk Utilization. I know CloudWatch will ...
- 151
0
votes
0
answers
70
views
How to find which db/collection/query triggers disk read?
We're running a MongoDB 3.0 server with multiple users accessing it and we're experiencing very frequent disk reads by mongod process utilizing our SSD drives to 100%
During these peaks the page ...
- 241