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Before installing NetVizura make sure to set the time on your server correctly. Time change after the installation will invalidate the license! 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. |
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Before installing NetVizura you will have to install: Oracle Java 1.8, Apache Tomcat 6 and PostgreSQL 9.3 or higher, in that order. The installation process has been tested on CentOS 6.6. |
NetVizura Installation Steps
To install NetVizura follow these steps:
Step 1: sudo and wget installation: yum -y install sudo wget
Step 2: Apache Tomcat 6 package installation:
- execute command
yum install tomcat6 add Tomcat service to system startup:
chkconfig tomcat6 on
Step 3: PostgreSQL package installation:
edit file /etc/yum.repos.d/CentOS-Base.repo
in section [base] add line "exclude=postgresql*"
in section [updates] add line "exclude=postgresql*"
go to http://yum.postgresql.org/ and choose stable PostgreSQL package in regard to your CentOS version and architecture.
CentOS 6, 64 bit example: https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-x86_64/pgdg-centos95-9.5-2.noarch.rpmin the folder where the file is downloaded execute command
yum -y localinstall pgdg-centos95-9.5-2.noarch.rpmexecute command
yum -y install postgresql95-serverexecute command
service postgresql-9.5 initdbexecute command
service postgresql-9.5 startverify that PostgreSQL is running properly with the command
service postgresql-9.5 statusadd PostgreSQL service to system startup:
chkconfig postgresql-9.5 on
Step 4: Installing NetVizura package
yum -y localinstall downloaded_file_name.rpmStep 5: Verify installation
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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:
| Installed RAM | PostgreSQL | Tomcat | OS |
|---|---|---|---|
| 4 GB | 2 GB | 1 GB | 1 GB |
| 16 GB | 10 GB | 5 GB | 1 GB |
Tweaking PostgreSQL
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 /var/lib/pgsql/PG_VERSION_NUMBER/data/postgresql.conf. You will need to restart the PostgreSQL service after done editing with command: service postgresql restart. 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.
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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.
For instance:
| Total RAM | Tomcat |
|---|---|
| 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):
- Edit file
/etc/tomcat6/tomcat6.conf - Locate
JAVA_OPTSenvironment variable that defines memory This line looks something like the following:JAVA_OPTS="${JAVA_OPTS} -Xmx1024m -Xms1024m" - Modify the
-Xmxand-Xmsto the same amount. This should look something like:JAVA_OPTS="${JAVA_OPTS} -Xmx2048M -Xms2048M" - Save the file and restart Tomcat:
service tomcat6 restart
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