Experiencing memory problems or timeouts ? Check the following:
Are your default wordpress and php memory settings up to handling all that you have added to the site?
Over time, as you add change themes, and add plugins, your wordpress setup starts needing more and more memory. Sometimes the last plugin added is the one that ‘tips it over the threshhold’. It may not be the main memory hog (or it may see below.) Please check your wordpress and php memory limits. Here are some helpful posts:
If your memory setting is already quite high, then evaluate whether you are asking the plugin to do too much:
Do you have recurring events ?
If you do have recurring events, please consider the following carefully:
How many days, months and number of events have you set as your maximum ?
This can influence how much work are you expecting the plugin to do. Setting unnecessary high thresholds can cause a lot of extra work. More info on number of events, number of days or months here.
How old is your ics file and how many ‘old’ events does it have ?
If it’s a google calendar, the ics feed does not at time of writing offer a way to request future events only. This means your ics file will grow. The plugin has to parse ALL the events in the file, hold them in memory to check for a possible modifying VEVENT with a later sequence number that modifies the date. More info on google calendar ics files – and how to bulk delete old events.