Hi Christoph,
Yes ist is only one of the processors that is at maximum capacity.
How do I do something like a thread-dump of a single thread ? We run the
Solr from the command line out-of-the-box and not in a code development
environment. Are there parameters that can be configured so that the
server creates dumps ?
Greetings
Georg
Am 31.07.2018 um 15:07 schrieb Christopher Schultz:
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Georg,
On 7/31/18 4:39 AM, Georg Fette wrote:
We run the server version 7.3.1. on a machine with 32GB RAM in a
mode having -10g.
When requesting a query with
q={!boost
b=sv_int_catalog_count_document}string_catalog_aliases:(*2*)&fq=string
_field_type:catalog_entry&rows=2147483647
the server takes all available memory up to 10GB and is then no
longer accessible with one processor at 100%.
Is it a single thread which takes the CPU or more than one? Can you
identify that thread and take a thread dump to get a backtrace for
that thread?
When we reduce the rows parameter to 10000000 the query works. The
query returns only 581 results.
The documentation at
https://wiki.apache.org/solr/CommonQueryParameters states that as
the "rows" parameter a "ridiculously large value" may be used, but
this could pose a problem. The number we used was Int.max from
Java.
Interesting. I wonder if Solr attempts to pre-allocate a result
buffer. Requesting 2147483647 rows can have an adverse affect on most
pre-allocated data structures.
- -chris
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Dipl.-Inf. Georg Fette Raum: B009
Universität Würzburg Tel.: +49-(0)931-31-85516
Am Hubland Fax.: +49-(0)931-31-86732
97074 Würzburg mail: georg.fe...@uni-wuerzburg.de
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