The real-time SQL monitoring is an Oracle database 11g new feature that enables you to monitor the performance of SQL statements while they are executing. Real-time SQL monitoring is automatically started when a SQL command runs in parallel or when it has consumed at least 5 seconds of CPU or I/O time in a single […]
Archives for September 2019
How to Configure Nagios NRPE Client for System Monitoring (CentOS/RHEL)
Question: How to configure CentOS/RHEL system as Nagios NRPE Client so it can be monitored from Nagios-Server for system health/performance? Enable EPEL REPO (Fedora Repository) and Install Required Packages 1. Download the epel repository packages for CentOS/RHEL 5 and 6. FOR CentOS/RHEL 6: # wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm For CentOS/RHEL 5: # wget http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm 2. Install Epel […]
“The requested URL returned error: 403 Forbidden” – yum update error
The Problem CentOS/RHEL/OEL 6 server’s configured to use local yum server for updates are getting following errors at time of yum update. Downloading Packages: (1/5): kernel-2.6.32-754.12.1.el6.x86_64.rpm | 32 MB 00:01 (2/5): kernel-headers-2.6.32-754.12.1.el6.x86_64.rpm | 4.6 MB 00:00 (3/5): kernel-uek-4.1.12-124.26.10.el6uek.x86_64.rpm | 42 MB 00:00 (4/5): kernel-uek-firmware-4.1.12-124.26.10.el6uek.noarch.rpm | 2.5 MB 00:00 http://localyum/yum/OracleLinux/OL6/latest/x86_64/getPackage/oraclelinux-release-el6-1.0-6.el6.noarch.rpm: [Errno 14] PYCURL ERROR 22 – […]
How to Set “dev_loss_tmo” Value Persistently Using Udev Rule
1. Check the attributes of the FC remote port(s) using the below command: # udevadm info –attribute-walk –path=/sys/class/fc_remote_ports/rport-x:y-z 2. Then create udev rules that match all viable rports by matching the ‘role’ mentioned in the attributes returned in the above command. For example, create /etc/udev/rules.d/99-tmo.rules and include the below contents. ACTION!=”add|change”, GOTO=”tmo_end” KERNELS==”rport-?*”, SUBSYSTEM==”XXXX”, ATTR{roles}==”XXXX”, […]
“Could not resolve proxy: https; Unknown error” – error with ‘yum update’
The Problem While executing: # yum update The following error occurs: One of the configured repositories failed (Unknown), and yum doesn’t have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work “fix” this: 1. Contact the upstream for the repository […]
How to Reinstall Corrupted Library with yum
This post will guide the user on how to reinstall a corrupted library via yum. In general, the command below will find which package the corrupted library belongs to: # yum provides \*/[so_file] In this example, we used this error message “/bin/login: error while loading shared libraries: /lib64/libcrypt.so.1: file too short” to identify the corrupted […]