Title: samlangdon's Replies | WordPress.org --- # samlangdon [ ](https://wordpress.org/support/users/samlangdon/) * [Profile](https://wordpress.org/support/users/samlangdon/) * [Topics Started](https://wordpress.org/support/users/samlangdon/topics/) * [Replies Created](https://wordpress.org/support/users/samlangdon/replies/) * [Reviews Written](https://wordpress.org/support/users/samlangdon/reviews/) * [Topics Replied To](https://wordpress.org/support/users/samlangdon/replied-to/) * [Engagements](https://wordpress.org/support/users/samlangdon/engagements/) * [Favorites](https://wordpress.org/support/users/samlangdon/favorites/) Search replies: ## Forum Replies Created Viewing 12 replies - 1 through 12 (of 12 total) * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Printify for WooCommerce] Please update your plugin](https://wordpress.org/support/topic/please-update-your-plugin-14/) * [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [1 year, 12 months ago](https://wordpress.org/support/topic/please-update-your-plugin-14/#post-17960190) * Same issue here and haven’t had much luck with Printify support (logged with the tech team, but no response from them after a week). I’ve customised the get_shipping_rates function in the Printify_Shipping_API class for the plugin on my site for now. Nothing fancy – I’m saving the Printify API results in PHP session after it’s called for the first time and using that until the request (basket contents & shipping address) changes, but it dramatically reduces basket & checkout page load time. I’ve shared the code with Printify via my support ticket and suggested they implement something like this in the plugin. In the meantime, I’ve disabled auto updates for the plugin on my site and will wait to see what happens in future versions. Happy to share if it helps. * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[W3 Total Cache] Cache control headers not appearing](https://wordpress.org/support/topic/cache-control-headers-not-appearing/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [3 years, 6 months ago](https://wordpress.org/support/topic/cache-control-headers-not-appearing/#post-16403383) * Hi Marko, * Many thanks for coming back so quickly – I’ve actually just figured out what the problem was. I realise that on the site where I was testing, although I’d stripped out all the plugins et al, I was still logged in as a non-admin user( required for site functionality). WordPress understandably adds non-caching headers for all logged-in users. When I log out, the headers look correct as I set in W3TC browser caching. * Sorry to waste your time – I’ll close the ticket. Hopefully this might help someone else with a similar issue searching through tickets one day! * All the best, * Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[W3 Total Cache] Cache control headers not appearing](https://wordpress.org/support/topic/cache-control-headers-not-appearing/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [3 years, 6 months ago](https://wordpress.org/support/topic/cache-control-headers-not-appearing/#post-16402525) * Sorry, it was a long day – realise I should have been looking at the HTTP headers! So now I see the cache-control header, but I do still have an issue with this. I’ve got expires time set to 3600, but the cache-control header looks like this on pages and posts: * cache-control: no-cache,must-revalidate,max-age=0,public * Any ideas much appreciated. * Many thanks, * Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Varnish/Nginx Proxy Caching] Timeout when saving large menus](https://wordpress.org/support/topic/timeout-when-saving-large-menus/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [9 years ago](https://wordpress.org/support/topic/timeout-when-saving-large-menus/#post-9340669) * Great, thanks very much Razvan – looks like that’s done the job! * Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Varnish/Nginx Proxy Caching] ob_end_flush error](https://wordpress.org/support/topic/ob_end_flush-error-2/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [9 years, 4 months ago](https://wordpress.org/support/topic/ob_end_flush-error-2/#post-8952948) * Excellent – looks like that’s done the job. Thanks very much Razvan. * Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Varnish/Nginx Proxy Caching] ob_end_flush error](https://wordpress.org/support/topic/ob_end_flush-error-2/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [9 years, 4 months ago](https://wordpress.org/support/topic/ob_end_flush-error-2/#post-8943754) * Great, thanks very much Razvan. * Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Wordfence Security - Firewall, Malware Scan, and Login Security] Slow Wordfence calls](https://wordpress.org/support/topic/slow-wordfence-calls/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [9 years, 6 months ago](https://wordpress.org/support/topic/slow-wordfence-calls/#post-8702431) * No worries and thanks for coming back Matt. We generally turn off the live traffic view, so that element’s not a problem. Performance seems to have improved since excluding synching on wflogs – I guess that comes at the expense of having well tuned firewall rules, although haven’t had any complaints on that score yet ( i.e. visitors or WP users receiving 503s). We’re planning to install the Apache Mod Sec WAF commercial rules from Trustwave so we can maintain rules in one place that run as soon as users hit Apache for any of our sites (including some non WP sites), so may turn off the Wordfence WAF to save doubling up. Out of curiosity, have you heard of any clashes between Apache based WAF and Wordfence WAF? I presume they would work okay together, but it’s just a bit redundant to have the server use resources carrying out a similar set of checks twice on each request. * The file permissions issue made a huge difference for us, but maybe there’s something unusual about the setup we have. All is working fine now those folders have the right permissions anyway. * Thanks, Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Wordfence Security - Firewall, Malware Scan, and Login Security] Slow Wordfence calls](https://wordpress.org/support/topic/slow-wordfence-calls/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [9 years, 7 months ago](https://wordpress.org/support/topic/slow-wordfence-calls/#post-8665450) * Hi again Matt, * I’ve looked a little further into this and found the following: * 1) The IO was a red herring I think – an IO monitor (New Relic) was telling me IO was 100%, but turned out to be because of an unfinished transaction somewhere– once I rebooted the server, that sorted itself out and IO on the servers is actually fine. I have excluded wflogs files from rsyncing between servers now anyway, as I think this might have been confusing matters and is unecessary work. Out of curiosity, do you know what would happen if the same site has two different copies of the wflogs files on different load balanced servers? (since different requests will come to each server) * 2) I don’t think noc4.wordfence.com is causing a problem for website visitors on my server. I’m currently seeing around 30 calls per minute to it between all the sites and it is consistently the most called, slowest external service, but so long as it runs in the background and doesn’t eat too many server resources, I don’t suppose it should be an issue. * 3) Most importantly, I think I’ve finally figured where the main issue is that has been slowing down the response to website visitors. Looks like it simply came down to /wp-content/plugins/wordfence/tmp and /wp-content/wflogs folders not having permission for the web server account to write to them. I could see Wordfence was trying to chmod them and getting permission denied on a rename relating to them and I guess this was taking several seconds for some reason. I changed these folders from 755 to 775 on all our sites and now this appears to be resolved. I could see the tmp folder not having correct permissions showed up in the Wordfence diagnostics page, but it certainly wasn’t clear this was causing such a major issue, so it might be worth putting something more prominent in, in case anyone else has this issue and doesn’t realise. * Thanks, Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Wordfence Security - Firewall, Malware Scan, and Login Security] Slow Wordfence calls](https://wordpress.org/support/topic/slow-wordfence-calls/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [9 years, 7 months ago](https://wordpress.org/support/topic/slow-wordfence-calls/#post-8630827) * Hi Matt, * Thanks for coming back to me. My guess is that between the 40 plus sites, they probably are pretty much constantly under attack between them. I can see wordfence_syncAttackData has been called around 6,000 times on our servers (I can see this from running queries on Apache logs) in the last 12 hours, with most of the calls coming from a dozen sites, that have presumably been attacked more than the rest. * We don’t use NFS, but I do see high IO on these web servers, a reasonable amount of which coming from Apache (looking at iotop), so I think the frequent writing to disk could be causing an issue for us. It’s maybe compounded by the fact we have a load balanced master/slave web server setup running where rsync is updating the slave with all file changes in the websites. * I would prefer not to turn the Wordfence firewall off on these sites – is there any way to turn the writing to disk and synching off without turning off the firewall? * Thanks, Sam * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Subscribe2 - Form, Email Subscribers & Newsletters] Not all subscribers are sent emails from posts](https://wordpress.org/support/topic/not-all-subscribers-are-sent-emails-from-posts/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [11 years, 4 months ago](https://wordpress.org/support/topic/not-all-subscribers-are-sent-emails-from-posts/#post-6022709) * Marvellous, thanks very much [@mattyrob](https://wordpress.org/support/users/mattyrob/)– looks like that’s done the trick! * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Subscribe2 - Form, Email Subscribers & Newsletters] Not all subscribers are sent emails from posts](https://wordpress.org/support/topic/not-all-subscribers-are-sent-emails-from-posts/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [11 years, 4 months ago](https://wordpress.org/support/topic/not-all-subscribers-are-sent-emails-from-posts/#post-6022706) * Thanks for the quick response [@mattyrob](https://wordpress.org/support/users/mattyrob/) * I’m using version 10.18.4 * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[Subscribe2 - Form, Email Subscribers & Newsletters] Not all subscribers are sent emails from posts](https://wordpress.org/support/topic/not-all-subscribers-are-sent-emails-from-posts/) * Thread Starter [samlangdon](https://wordpress.org/support/users/samlangdon/) * (@samlangdon) * [11 years, 4 months ago](https://wordpress.org/support/topic/not-all-subscribers-are-sent-emails-from-posts/#post-6022700) * Thanks very much for the tip [@mattyrob](https://wordpress.org/support/users/mattyrob/). I think I’ve now figured out the reason it’s not working in some cases, but I’m not entirely sure how to fix it. * What’s happening is, when a user registers and chooses the categories they are interested in on the front end of the site (for which I’m using TT Subscribe2 Frontend plugin), they don’t receive emails. * If you then edit the person’s categories in the Subscribe2 area, they do receive emails. I can see the meta key: wp_6_s2_authors is being added in the usermetadata database table for that user at this point, which I gather tells Subscribe2 which authors that person doesn’t want to receive emails from (usually the value is empty, as the person would want to hear from all authors). So I guess, without that, it assumes they don’t want to hear from any authors. * Can you think of a workaround for this so everyone is automatically subscribed to emails from all authors? (within the categories they specify) * Many thanks, Sam Viewing 12 replies - 1 through 12 (of 12 total)