Automatically, then network activate – white screen on all backends
Automatically, then single-site activate – first site works fine, next one, white screen
Manually in /mu-plugins/ with no effect at all.
My server access logs didn’t show anything unusual. If there’s a plugin conflict, I’ll try disabling them in development.
Do the plugin’s DB tables get created and populated when the plugin is activated on the first/next site? You can identify the tables by the “blc” part of the table name. If the tables are created, do they contain any data?
So, I deactivated, and reactivated one site at a time. First site worked great. Subsequent sites timed out; perhaps the script was busy with the initial (major) link scan, because about 1 minute later, I refreshed the page and all of the links were accounted for (more than 500).
Overall, everything slowed down for about 10 minutes, probably during initial checking, and timed out. Then, as I activated each site, working great!
So, initial questions:
– Is there any way to throttle initial checking so it doesn’t slow down the whole instance, causing timeouts?
– Would it then be possible to network activate?
That said, now that the initial check is done, all is working great (with site-by-site activation)!
I agree that having a way to throttle the initial scan would be useful, but so far I haven’t been able to come up with a way to do it. There’s a “Server load limit” setting in Settings -> Link Checker -> Advanced that you could tweak, but it won’t help much in this case because the first scan will already be running by the time you get to that settings screen.
You can also try the latest dev. version. It fixes a bug that would cause the plugin to perform a lot of redundant DB scans when it gets deactivated and then immediately re-activated (as when upgrading). The total number of queries issued during activation has also been trimmed down a bit.
(Of course, the dev. version could contain a couple of brand new bugs…)
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