Title: CPU usage Last modified: April 14, 2017 --- # CPU usage * Resolved [dbarraza](https://wordpress.org/support/users/bradwilcox/) * (@bradwilcox) * [9 years, 1 month ago](https://wordpress.org/support/topic/cpu-usage-10/) * W2012r usage seems to be about 5% per installation of the plugin. If I watch the CPU graph it makes constant peaks and valleys about every five seconds — or even every second. I assume this is because the plugin is working, perhaps quite hard in my case, to follow my rules. I’ve set it to US-only whitelist, including front-end blocking. * Any tips to bring down CPU usage? * If I have four separate WP sites all running from this server, should I therefore expect about 20% baseline CPU usage going forward to be normal? * Update: after restarting my IIS the CPU utilization came way down to 1%. When I then opened four tabs on my own browser and logged into the four WP sites, into the geoblock settings, the CPU usage returned to a constant and fast cycle of about 1-15% CPU. I assume this is related to the number of cgi/fastcgi exe instances that are presently running (about ten, of which most are I myself). - This topic was modified 9 years, 1 month ago by [dbarraza](https://wordpress.org/support/users/bradwilcox/). Viewing 4 replies - 1 through 4 (of 4 total) * Plugin Author [tokkonopapa](https://wordpress.org/support/users/tokkonopapa/) * (@tokkonopapa) * [9 years, 1 month ago](https://wordpress.org/support/topic/cpu-usage-10/#post-9032433) * Hi [@bradwilcox](https://wordpress.org/support/users/bradwilcox/), * I reported the resource usages in the similar topic at [causing high resource consumption?](https://wordpress.org/support/topic/causing-high-resource-consumption/#post-9032405). * Please try the followings: * 1. Disabling DNS reverse lookup DNS lookup spends server resources relatively high. So if you enable “Block by country” on “Front-end target settings” section, replace `HOST` to `*`. Please refer to the document “[UA string and Qualification](http://www.ipgeoblock.com/codex/ua-string-and-qualification.html)” about `HOST`. * 2. Disabling “Record validation statistics” on “Record settings” section. * 3. Disabling “Record validation logs” or “Only when blocked” on “Record settings” section. * I think that No.1 is a suspect of this issue. So I should provide an option to disable/enable DNS lookup in the next release. * I’d appreciate if you provide me some feedback about the above results. * Thank you for heads up! * P.S. Related to the number of instances, Apache also makes multiple HTTP daemon to listen the requests and run PHP. I think it’s quite normal. * Thread Starter [dbarraza](https://wordpress.org/support/users/bradwilcox/) * (@bradwilcox) * [9 years, 1 month ago](https://wordpress.org/support/topic/cpu-usage-10/#post-9033967) * Thank you for the reply. * I think I already had DNS reverse lookup disabled: it seems to be disabled by default in IIS8. * I would like to initially keep both record setting options on for now, because it is helping me watch who is trying to hack my site. * Could you explain what you wrote about the **HOST and \*** ? I am not quite understanding you. Currently in that setting field all I have is the default: * Google:HOST,bot:HOST,slurp:HOST spider:HOST,archive:HOST,*:FEED *:HOST=embed. ly,Twitterbot:US,Facebot:US * If you want to make changes in that filed perhaps you would edit the above so I can copy paste it? * By the way, I don’t want to give twitter or facebook or anything other than google access to crawl the site. - This reply was modified 9 years, 1 month ago by [dbarraza](https://wordpress.org/support/users/bradwilcox/). * Plugin Author [tokkonopapa](https://wordpress.org/support/users/tokkonopapa/) * (@tokkonopapa) * [9 years, 1 month ago](https://wordpress.org/support/topic/cpu-usage-10/#post-9034418) * Hi [@bradwilcox](https://wordpress.org/support/users/bradwilcox/), * > it seems to be disabled by default in IIS8. * OK. Just to be sure, please search “66.249.66.1” (googlebot.com). If the result of “host” indicate “66.249.66.1”, that’s OK. But if it indicates something like“ crawl-66-249-66-1.googlebot.com”, then the fallback function in this plugin works. It depends on how DNS lookup is disabled in your server. * Regarding **HOST** and **\***, this plugin never try to get PTR record for DNS reverse lookup if “UA string and qualification” does not include “**HOST**“. For example, `Google:*` just checks if user agent string includes `Google` and never verify its host. * Please copy and paste the followings: * ``` Google:*,bot:*,slurp:* spider:*,archive:*,*:FEED embed.ly:*,Twitterbot:US,Facebot:US ``` * And the last thing I should notice is “**Validation timing**” in “**Validation rule settings**“. Please try **“mu-plugins” (ip-geo-block-mu.php)**. You can refer to the document “[Validation timing](http://www.ipgeoblock.com/codex/validation-timing.html)“. * Thanks. * Thread Starter [dbarraza](https://wordpress.org/support/users/bradwilcox/) * (@bradwilcox) * [9 years, 1 month ago](https://wordpress.org/support/topic/cpu-usage-10/#post-9042387) * Thank you for the help. The server’s CPU has stabilized finally today at about 2% but even better it’s smooth now. What I pasted seemed to have helped even though I think I had other issues outside of your plugin that I also solved. LOVE your plugin. What a relief to block a bunch of foreign traffic that was all illegitimate anyway. Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘CPU usage’ is closed to new replies. * ![](https://ps.w.org/ip-geo-block/assets/icon-128x128.png?rev=1148568) * [IP Geo Block](https://wordpress.org/plugins/ip-geo-block/) * [Frequently Asked Questions](https://wordpress.org/plugins/ip-geo-block/#faq) * [Support Threads](https://wordpress.org/support/plugin/ip-geo-block/) * [Active Topics](https://wordpress.org/support/plugin/ip-geo-block/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/ip-geo-block/unresolved/) * [Reviews](https://wordpress.org/support/plugin/ip-geo-block/reviews/) * 4 replies * 2 participants * Last reply from: [dbarraza](https://wordpress.org/support/users/bradwilcox/) * Last activity: [9 years, 1 month ago](https://wordpress.org/support/topic/cpu-usage-10/#post-9042387) * Status: resolved