[Xapian-tickets] [Xapian] #671: Performance issues when querying over large number of local databases (shards)

[Xapian]

#671: Performance issues when querying over large number of local databases
(shards)
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 Reporter:  wgreenberg            |             Owner:  olly
     Type:  defect                |            Status:  new
 Priority:  normal                |         Milestone:
Component:  Matcher               |           Version:
 Severity:  normal                |        Resolution:
 Keywords:  sharding performance  |        Blocked By:
 Blocking:                        |  Operating System:  Linux
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Comment (by wgreenberg):

 Added a patch which implements ChertDatabase::request_document with the
 readahead op. This results in a nice speedup when document data is smaller
 than 1 B+tree block size (i.e. only 1 read is required)

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Ticket URL: <http://trac.xapian.org/ticket/671#comment:7>
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