Sometimes when I use curl to query solr I get a slow real time response but a
short QTime.
Here's an example:
$ time curl "solrsandbox/testindex/select/?q=all:science,data&rows=500" >
foo
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 302k 0 302k 0 0 103k 0 --:--:-- 0:00:02 --:--:--
104k
real 0m2.935s
user 0m0.003s
sys 0m0.012s
It took nearly 3 seconds to return 302K of data at an upload speed of 103K
but the query response time is this:
<int name="QTime">500</int>
I'm guessing the delay is from Lucene and not the network but I could be
wrong. 90% of my queries are 8 to 10 times faster than this.
Does anyone have an idea why a query that takes solr just half a second (500
ms) to execute would take 3 seconds to transfer the data? And, this is a
query submitted from the same machine the index is on so I don't think the
network is a problem. Most queries return in a small fraction of a second of
real time.
Thanks.
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