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From James Hartshorn <jhartsh...@connexity.com>
Subject Bucket cache causes region server status page to use 1GB ram
Date Wed, 07 Oct 2015 19:00:12 GMT
Since we started using the HBase bucket cache I've noticed the region server status pages not
loading completely in Chrome, and causing significant performance problems on Firefox.  After
some investigation I realized the page itself is huge:

wc -l HBase-Region-Server-hb22.html
2010116 HBase-Region-Server-hb22.html

ls -lah HBase-Region-Server-hb22.html
32M Oct  6 19:23 HBase-Region-Server-hb22.html

Firefox "about:memory":
?  ???1,330.18 MB (48.22%) -- top(http://hb9.prod1.connexity.net:60030/rs-status#bc_l2, id=2010)
?  ?  ???1,329.61 MB (48.20%) -- active/window(http://hb9.prod1.connexity.net:60030/rs-status#bc_l2)

It looks like it's loading a thing for each bucket, though it's not displayed unless you click
L2, which usually just hangs the browser, on success you get a very very long list of all
the buckets, their size and occupancy, which seems of limited use to me.

Is there a way to stop the regionserver from sending this info for each page load?

(If having a few hundred thousand buckets is completely wrong don't worry, I'll be asking
about that too soon).

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