Categories
Docker Linux Magento

Fluentbit does not follow the logs

Fluentbit can follow and parse logs and send them to different systems, for example, Newrelic or Elasticsearch. But you may notice, that for some reason it does not follow files or stops follow ones.

Categories
Magento Varnish

Setup Varnish Transient cache for Magento

As you know, Varnish is a powerful caching system and it is a must-have on every Magento setup, even at the development workstation. But there is a little trick that very few people know about. It is the Transient cache, which I explain below.

Categories
Docker Linux

How to check memory limit inside Docker container

You should know the memory limit of your container (not the whole host) when packing applications there. For example and simplicity, let’s imagine you are creating customized redis, memcached or varnish image and you wish to know available memory when the container starts to set it as the memory limit for your application.

Categories
Magento

Magento2 Recommended OpCache Configuration

Magento is very demanding on component settings. Everything has to be carefully configured, especially the opCache in PHP. It is opCache that is mainly responsible for PHP’s performance.

Categories
Magento

java.lang.IllegalArgumentException: Limit of total fields [1000] in index [magento2_product_1_v3] has been exceeded

It is because the default value of index.mapping.total_fields.limit is 1000. To increase it for some index to 2000 just run curl request:

curl -s -XPUT http://elasticsearch:9200/magento2_product_1_v3/_settings -H 'Content-Type: application/json' -d '{"index.mapping.total_fields.limit": 2000}'
Categories
Linux

Show disk usage ignoring mounts

If you wish to know how much space uses some dir in Linux, you can use du -hs /some-folder. But what if you have a lot of mixed mounts in that folder and you want to know how much exactly this folder consumes at root disk storage?

Categories
Linux

Get count of files in a Linux directory recursively

It is very simple:

for i in */ .*/ ; do 
    echo -n $i": " ; 
    (find "$i" -type f | wc -l) ; 
done
Categories
Magento

PHP 7.4 preloading feature for Magento

PHP 7.4 introduces the opcache preloading function. Its meaning is to load all the necessary scripts into memory at the stage of starting the PHP daemon. Let’s see if this feature is worth using in Magento?

Categories
Varnish

Reload Varnish VCL using varnishadm

You can reload Varnish config without losing your cache. To do this, you should use the standard varnishadm CLI utility.

Categories
Uncategorized

WordPress slow 404 at Apache

After installing WordPress, you should definitely do a basic performance check. You should at least watch the logs and run Htop (or just Top). When you look at the access_log, you can find many 404 errors that need to be fixed.