| daniel added a comment. |
So, @Ladsgroup told me that he observed HtmlCacheUpdate jobs for 100 pages taking more than one minute. Given that the purging process is parallelized using fork, this is quite surprising. Why is this so slow? It used be be really fast, just sending out a few UDP packages.
I suppose that nowadays, the purge is done via EventBus/Kafka. Is it possible that talking to Kafka is a bottleneck here? The relevant method would be EventRelayer::notifyMulti. Do we have profiling info on that? Or in fact on everything going on in the HtmlCacheUpdate?
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