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NetVizura needs dedicated server
For security reason, make sure that your server or VM doesn't have anything installed on it before NetVizura installation. Other software of services running on the same server can impact installation.
NetVizura needs correct time
Before installing NetVizura make sure to set the time on your server correctly. Time change after the installation will invalidate the license!
NetVizura installation needs internet access
NetVizura requires working connection to the internet to install required dependent software. After installation is successful you can turn off internet access for NetVizura server.
Before installing NetVizura you will have to install: Java 1.8, Tomcat 7 or higher and PostgreSQL 9.5 or higher (9.6 recommended), in that order. The installation process has been tested on Windows Server 2008 R2 (64bit), Windows Server 2012 R2 (64bit), Windows Server 2016 R2 (64bit) and Windows Server 2019 (64bit) .
To install NetVizura on Windows follow these steps:
Step 1: Download and install Oracle Java 8 from Oracle official website www.oracle.com/technetwork/java/javase/downloads/index.html , or if you don't have support agreement with Oracle,you can download openJDK build from :https://github.com/ojdkbuild/ojdkbuild . In openJDK case,you should download .msi file eg. https://github.com/ojdkbuild/ojdkbuild/releases/download/18.104.22.168-1/java-1.8.0-openjdk-22.214.171.124-1.b04.ojdkbuild.windows.x86_64.msi .
Only 64-bit Java is supported, so choose Windows x64 installer. We recommend JDK package because it helps with troubleshooting.
Step 2: Download and install Tomcat 7 (or higher) as a service from Tomcat official website tomcat.apache.org. 32-bit/64-bit Windows Service Installer is available on the downloads page.
- Make sure to install Tomcat as a service, otherwise NetVizura installation won't be able to complete successfully.
- Make sure you have exactly one version of Tomcat installed on your system, otherwise application might not work as expected.
When prompted for the installation type, choose Full installation. This will enable Tomcat to start on boot.
Step 3: Download and install PostgreSQL 9.5+ from PostgreSQL official website https://www.enterprisedb.com/downloads/postgres-postgresql-downloads
- While installing PostgreSQL you will be prompted for password; make sure that you type in postgres
- Make sure you have exactly one version of PostgreSQL installed on your system, otherwise NetVizura might not work as expected or at all.
Step 4: Download NetVizura Windows Installer from NetVizura website and run installer with administrative privileges
Step 5: Follow the installation steps
Step 6: Verify installation
Now you can go to NetVizura web interface . Default login credentials: For example, if your server IP is 126.96.36.199 then point your browser to
Default login credentials:
For example, if your server IP is 188.8.131.52 then point your browser to
Post Install Steps
After installation tweaking of configuration files is required in order to utilize the installed RAM to the fullest extent. The main consumers of RAM are operating system, PostgreSQL database and Tomcat. General rule for distributing memory is to split it in ratio 2:1 between PostgreSQL and Tomcat with 1 GB or more reserved for operating system. For instance:
|4 GB||2 GB||1 GB||1 GB|
|16 GB||10 GB||5 GB||1 GB|
Tweaking PostgreSQL for best performance is a topic on which many books were written, but the following are some common sense suggestions. For the curious ones recommended reads (among countless others) are PostgreSQL Optimization Guide, PostgreSQL Tuning Guide, this article and this book.
In order to apply following tweaks edit file
postgresql.conf, this file is usually located in PostgreSQL data folder. You will need to restart the PostgreSQL service after done editing. Almost all of the following parameters are commented with carron character (
#). Be aware that if you comment out the parameter that has been changed, PostgreSQL will revert to the default value.
In the following example it is assumed that 4 GB of RAM is allocated for PostgreSQL. Before changing any parameters in postgresql configuration read the provided comments in the table below for more information regarding specific parameter. The recommended amount is The formula used is Increasing
parameter recommended value comment
30 NetVizura rarely uses more than 10 connections simultaneously, but it is good to have some reserve.
1024MB The recommended amount is
RAM/2, possibly even
RAM * 3/4.
0.7 This parameter can take values between 0 and 1. Default is set to 0.5, which means that the write phase of checkpoint process will take half of the checkpoint timeout time. Increasing this value will provide more time for checkpoint write phase to finish, thus decreasing IO usage.
max_connections*work_mem <= RAM/4, but using a bit more is still fine.
256MB Speeds up DB self clean process. Usually 4*work_mem or something in that ballpark
wal_buffers is helpful for write-heavy systems. Usually this is 16MB.
1GB If WAL files are under this size, files will be recycled for future checkpoints.
2GB Maximum size of WAL files, after that CHECKPOINT command is be issued and files are written to disk.
2 Number of simultaneous request that can be handled efficiently by disk subsystem.
off Turning this parameter off speeds up normal operation, but might lead to either unrecoverable data corruption, or silent data corruption, after power outage, OS or HDD failure. The risks are similar to turning off
fsync, though smaller.
off Don't wait for HDD to finish previous write operation. This brings the most benefit, but if there is power outage, OS or HDD failure in exact instant when PSQL issues write command to HDD, that data will be lost and the DB itself could be corrupted. On the other hand, DB can issue several magnitude more write commands in the same time period and consider all these done, thus improving write performance immensely.
off Similarly to "fsync" but with less benefit. Parallel system optimization (PSQL => 9.6)
2 Number of cores
1 Number of cores/2
(PSQL > 9.6) max_paralllel_workers
2 Number of cores
Before changing any parameters in postgresql configuration read the provided comments in the table below for more information regarding specific parameter.
The recommended amount is
The formula used is
Note that NetVizura demands postgresql installer which includes Microsoft Visual C++ pre-installation. Make sure that the postgresql installer you have downloaded installs Microsoft Visual C++ before postgres installation starts. Otherwise, you will need to install it manually.
Tomcat Memory Allocation
During installation NetVizura automatically allocates memory for Tomcat process. The amount allocated to Tomcat process is calculated according to the formula:
(RAMtotal - 1GB) / 3 but no less than 1GB.
|3 GB||1 GB|
|4 GB||1 GB|
|16 GB||5 GB|
However, if you need to tweak Tomcat RAM allocation differently (the example for 2048MB):
- Double click on Apache Tomcat Properties in system tray
- In Java tab under Java options modify the
-Xmxparameter to allocate additional memory to Tomcat. Additionally, set parameter
-Xmsto the same amount. Also set Initial memory pool and Maximum memory pool to the same amount. This should look like on picture below.
- Back to the General tab, click Stop and Start to restart Tomcat.
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