We’re running a WordPress multisite instance on two Rackspace Cloud servers, one web and one database, with 30 or so sites currently. I’ve put Nginx in front for static assets and Apache handles all dynamic requests. I’ve also configured Memcached for the database and APC op code caching for PHP. W3 Total Cache is enabled … Read more
I am running the latest WordPress version (4.6) on a LAMP server (shared hosting) with PHP version 5.6.12. I am trying to programmatically add 10 images, uploaded with ftp to the wp-uploads directory, to the media library using the three WordPress functions wp_insert_attachment, wp_generate_attachment_metadata and wp_update_attachment_metadata. My problem: Sometimes, my PHP script works (all 10 … Read more
How do you measure the memory usage of an application or process in Linux? From the blog article of Understanding memory usage on Linux, ps is not an accurate tool to use for this intent. Why ps is “wrong” Depending on how you look at it, ps is not reporting the real memory usage of … Read more
How can I find the memory used on my Android application, programmatically? I hope there is a way to do it. Plus, how do I get the free memory of the phone too? 10 s 10 Note that memory usage on modern operating systems like Linux is an extremely complicated and difficult to understand area. … Read more
What is the difference between “cache unfriendly code” and the “cache friendly” code? How can I make sure I write cache-efficient code? 9 s 9 Preliminaries On modern computers, only the lowest level memory structures (the registers) can move data around in single clock cycles. However, registers are very expensive and most computer cores have … Read more
What’s the difference beetween define( ‘WP_MEMORY_LIMIT’, ’96M’ ); and define( ‘WP_MAX_MEMORY_LIMIT’, ‘256M’ ); In my host I have this define( ‘WP_MEMORY_LIMIT’, ‘786M’ ); define( ‘WP_MAX_MEMORY_LIMIT’, ‘512M’ ); is this correct, should the WP_MAX_MEMORY_LIMIT be higher ? 2 s 2 WordPress tells us: the WP_MEMORY_LIMIT option allows you to specify the maximum amount of memory that … Read more
I want to know how to get size of objects like a string, integer, etc. in Python. Related question: How many bytes per element are there in a Python list (tuple)? I am using an XML file which contains size fields that specify the size of value. I must parse this XML and do my … Read more
So, I’ve run into what looks like a WP RAM usage problem and am looking for a solution. The only place I’m really having this problem on my site is with a Site Map page that I’m trying to populate, but a solution to this problem could be universally applied and save on RAM usage … Read more
I’m building a site for a photographer who uploads pictures that are normally large for todays digital cameras. Images are quite memory intensive, especially the image operations like creating thumbnails. So I wanted to raise the memory limit in the admin above 256MB – how can this be done? I allowed CGI and PHP to … Read more
Every time I call WP_Query() in the function below, WordPress leaks 8 megs of memory. And since I call this function a lot, things get hairy pretty quickly… 🙁 I’ve tried unsetting the resulting $queryObject as well as periodically calling wp_cache_flush(), but neither seems to have any effect. Any thoughts? function get_post_ids_in_taxonomies($taxonomies, &$terms=array()) { $post_ids … Read more
