IT Knowledge Base

Technical Repository

HowTo: MySQL thread_cache_size Tuning

MySQL> SHOW GLOBAL STATUS LIKE ‘Connections’; +—————+——-+ | Variable_name | Value | +—————+——-+ | Connections | 8608 | +—————+——-+ 1 row in set (0.01 sec) MySQL> SHOW GLOBAL STATUS LIKE ‘Threads_created’; +—————–+——-+ | Variable_name | Value | +—————–+——-+ | Threads_created | 102 | +—————–+——-+ 1 row in set (0.00 sec) MySQL> SHOW GLOBAL STATUS LIKE […]

Read More


HowTo: Enable Linux ZRAM Compression

ZRAM compression ( compressed swap residing in ram / over allocating memory ) A successor to compcache, zram is fully integrated in the Linux kernel and uses lzo compression. Compress memory on the fly to reduce swapping. Uses a small amount of cpu, however the reduced i/o usage more than makes up for this. Note: We […]

Read More


HowTo: Configure Windows Remote Management Service to allow HTTP and Basic Authentication

Run the following command to set the default WinRM configuration values. winrm quickconfig (Optional) Run the following command to check whether a listener is running, and verify the default ports. winrm e winrm/config/listener Enable basic authentication on the WinRM service. Run the following command to check whether basic authentication is allowed. winrm get winrm/config Run […]

Read More


HowTo: Inject Cisco UCS Drivers into Windows 2012 R2 ISO

dism /get-wiminfo /wimfile:”./Workspace\Windows 2012 R2\sources\boot.wim” dism /Mount-Wim /WimFile:”./Workspace\Windows 2012 R2\sources\boot.wim” /Index:2 /MountDir:”./Workspace\Mount” dism /image:”./Workspace\Mount” /Add-Driver /driver:”./Workspace\Drivers” -Recurse dism /unmount-wim /mountdir:”./Workspace\Mount” /commit dism /get-wiminfo /wimfile:”./Workspace\Windows 2012 R2\sources\install.wim” dism /Mount-Wim /WimFile:”./Workspace\Windows 2012 R2\sources\install.wim” /Index:4 /MountDir:”./Workspace\Mount” dism /image:”./Workspace\Mount” /Add-Driver /driver:”./Workspace\Drivers” -Recurse dism /unmount-wim /mountdir:”./Workspace\Mount” /commit

Read More


HowTo: Fix – SCVMM doesn’t show hosts performance

The issue was that in the SCVMM console, the performance view was static, and didn’t show any changes at all. Open a command prompt (Run as Administrator) and fire the following commands: 1) Lodctr /R (this will rebuild the perf counters from system backup store) 2) Winmgmt /resyncperf (this will register the system performance libraries […]

Read More