: You might think, if I only ask for the top 10 docs, don't i only read 10 field
: values? But of course you don't know what docs will be returned as each search
: comes in...so you have to cache them all.
Arguements have been made in the past that when you have an index
large enough that the Fi
On Thursday 20 March 2008 07:22:27 Mark Miller wrote:
> You might think, if I only ask for the top 10 docs, don't i only read 10
> field values? But of course you don't know what docs will be returned as
> each search comes in...so you have to cache them all.
If it lazily cached one field at a tim
Heres what happens: in order to sort all of the hits you get back on a
field, you need to get the value of that field for comparisons right?
Well it turns out that reading a field value from the index is pretty
slow (its on the disk after all)...so Lucene will read all of the terms
in the field
Hi,
And is it not passibe to sort on the result we get instead of on all the
values like
Hits hits = searcher.search(query);
and it will be good if got sorting on the hits i.e on the result
thanks for the reply
markrmiller wrote:
>
> To sort on 13mil docs will take like at least 400 mb fo
How can i do sorting on the results i get (if already hits are there then
how to sort on the hits),instead of sorting on all the values b4 getting
results
Chris Lu wrote:
>
> This is because sorting will load all values in that sortFirled into
> memory.
>
> If it's an integer, you will need 4*
Thanks for the reply.
Actually am sorting on a specific field that is on keyword feild which is
unique
and i had 1 gb ram
markrmiller wrote:
>
> To sort on 13mil docs will take like at least 400 mb for the field
> cache. Thats if you only sort on one field...it can grow fast if you
> allow mu
Whoops...10 times to much there. more like 40 meg I think. A string
sort could be a bit higher though, you also need to store all of terms
to index into.
sandyg wrote:
this is my search content
QueryParser parser = new QueryParser("keyword",new StandardAnalyzer());
Query query = parser.parse
To sort on 13mil docs will take like at least 400 mb for the field
cache. Thats if you only sort on one field...it can grow fast if you
allow multi field sorting.
How much RAM are you giving your app?
sandyg wrote:
this is my search content
QueryParser parser = new QueryParser("keyword",new
This is because sorting will load all values in that sortFirled into memory.
If it's an integer, you will need 4*N bytes, which is additional 52M for you.
There is no programatical way to increase memory size.
--
Chris Lu
-
Instant Scalable Full-Text Search On Any Databa
