[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:  Other                 |           Version:
 Severity:  normal                |        Resolution:
 Keywords:  sharding performance  |        Blocked By:
 Blocking:                        |  Operating System:  Linux
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Comment (by wgreenberg):

 Added a patch which performs posix_fadvise readahead syscalls for each
 postlist, for each term in a multi-database query. This provides an
 equivalent performance boost to the hacky patch in
 d8af1fde685626283826ecaf52d4ac49cebdea98.patch​

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Ticket URL: <http://trac.xapian.org/ticket/671#comment:2>
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