Monitor .NET CLR Garbage Collected heap from your web application

In order to let your .NET (web) application run smooth over a longer period of time, it is important to monitor the .NET CLR Garbage Collector (GC) and collection. Here is how you can monitor this in a Zabbix template using Powershell WMI / CIM and Win32_PerfRawData_NETFramework_NETCLRMemory Windows Performance Counters.

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How to optimize Umbraco 8 performance

Learn how to optimize a site running Umbraco 8 with a Microsoft SQL Server database back-end.

Out of the box, Umbraco is a well built and pretty fast content management system. However, it is important you perform some steps to further optimize Umbraco’s performance and loading speed. Here on Sysadmins of the North, I wrote about 11+ tips to optimize Umbraco 7 CMS earlier, and in this post I write about implementing them in Umbraco 8.

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Increase WMI memory to support large volume of queries

How to optimize WMI performance and memory usage in Windows Server

Since I started expanding my Zabbix scripts and templates for monitoring Windows Server instances – AD, IIS and SQL Server – I found WMI was failing more and more. WMI stopped working: WmiPrvse.exe would just crash after hitting some memory limit of 512 MB. If you run into the same issue with Windows Management Instrumentation, here is how you can increase WMI Provider Service’s memory quota. Doing so resolved my issues.

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ASP.NET web application monitoring in Zabbix, part 2

When you host multiple websites in IIS, and you need to monitor them, Zabbix is one of your options. In Zabbix, you can take advantage of Windows Servers performance counters using perf_counter and perf_counter_en. In this article, I’ll show you some important Windows performance counters to monitor your ASP.NET web application in Zabbix

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Force BITS to download WSUS updates in the foreground in Windows Server

When WSUS downloads are slow

WSUS uses BITS for downloading updates, and it does so in background mode. Unfortunately, this utilizes remaining bandwidth of the server instead of its full capacity. To speed up WSUS downloads, you can configure BITS in WSUS to use foreground priority.

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How to Fix Yoast SEO for WordPress DeleteDuplicateIndexables MySQL error

In recent days, there are a number of reports about broken Yoast SEO database operations, related to the DeleteDuplicateIndexables function. The PHP function is located in the file wordpress-seo\src\config\migrations\20200507054848_DeleteDuplicateIndexables.php, and in this post I’ll provide you with a possible fix for this statement. Read on.

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Reduce Wordfence CPU usage, disable Wordfence “Live Traffic View”

Whenever WordPress is using a lot of CPU and you have Wordfence Security plugin enabled, it is recommended to double check some settings. Unfortunately the Wordfence “Live Traffic Options” (“Traffic logging mode”) feature can cause high CPU usage and load issues for WordPress websites. Therefore, I recommend you disable this feature to improve the performance of your WordPress website.

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Increase WordPress’ memory limit WP_MEMORY_LIMIT properly in wp-config.php

How to increase the memory limit for your WordPress website, the right way.

The WordPress memory limit can be increased by the WP_MEMORY_LIMIT variable in wp-config.php. However, I see this done wrong over and over again in WordPress plugins and themes. In a worst case scenario this may even decrease the available amount of memory for WordPress! So be careful with the advice you follow. In this post I show you a correct way of setting WordPress WP_MEMORY_LIMIT and PHP memory_limit settings.

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Get current number of FTP client connections (NonAnonymous) with PowerShell and Get-Counter

Ever wanted to know the current number of active FTP client connections on your Windows Server IIS FTP Service? You can get this statistic using PowerShell, the Get-Counter cmdlet and the Microsoft FTP Service Current NonAnonymous Users performance counter.

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Install Varnish Cache on CentOS 6.7

In this article I’ll show you how to install Varnish Cache on CentOS, version 6.7 in this case. Varnish is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Because Varnish Cache is really, really fast, web applications like WordPress, Drupal and Joomla can greatly benefit from Varnish Cache.

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Loading time: 91 queries, 0.427 seconds using 13162832 bytes memory. Peak memory usage: 13576632 bytes.