* [PATCH 04/26] search: reenable phrase search on non-chert Xapian
2019-05-23 9:36 6% [PATCH 00/26] xcpdb: ease Xapian DB format migrations Eric Wong
@ 2019-05-23 9:36 7% ` Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2019-05-23 9:36 UTC (permalink / raw)
To: meta
This is assuming nobody uses flint or earlier, anymore;
as flint predates the existence of this project.
---
lib/PublicInbox/Search.pm | 48 +++++++++++++++++++++++----------------
t/search.t | 1 +
2 files changed, 30 insertions(+), 19 deletions(-)
diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index eae10d8..d861cf4 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -24,8 +24,8 @@ sub load_xapian () {
# n.b. FLAG_PURE_NOT is expensive not suitable for a public
# website as it could become a denial-of-service vector
- # FLAG_PHRASE also seems to cause performance problems
- # sometimes.
+ # FLAG_PHRASE also seems to cause performance problems chert
+ # (and probably earlier Xapian DBs). glass seems fine...
# TODO: make this an option, maybe?
# or make indexlevel=medium as default
FLAG_PHRASE()|FLAG_BOOLEAN()|FLAG_LOVEHATE()|FLAG_WILDCARD();
@@ -137,26 +137,35 @@ sub xdir ($;$) {
}
}
+sub _xdb ($) {
+ my ($self) = @_;
+ my $dir = xdir($self, 1);
+ my ($xdb, $slow_phrase);
+ my $qpf = \($self->{qp_flags} ||= $QP_FLAGS);
+ if ($self->{version} >= 2) {
+ foreach my $part (<$dir/*>) {
+ -d $part && $part =~ m!/\d+\z! or next;
+ my $sub = Search::Xapian::Database->new($part);
+ if ($xdb) {
+ $xdb->add_database($sub);
+ } else {
+ $xdb = $sub;
+ }
+ $slow_phrase ||= -f "$part/iamchert";
+ }
+ } else {
+ $slow_phrase = -f "$dir/iamchert";
+ $xdb = Search::Xapian::Database->new($dir);
+ }
+ $$qpf |= FLAG_PHRASE() unless $slow_phrase;
+ $xdb;
+}
+
sub xdb ($) {
my ($self) = @_;
$self->{xdb} ||= do {
load_xapian();
- my $dir = xdir($self, 1);
- if ($self->{version} >= 2) {
- my $xdb;
- foreach my $part (<$dir/*>) {
- -d $part && $part =~ m!/\d+\z! or next;
- my $sub = Search::Xapian::Database->new($part);
- if ($xdb) {
- $xdb->add_database($sub);
- } else {
- $xdb = $sub;
- }
- }
- $xdb;
- } else {
- Search::Xapian::Database->new($dir);
- }
+ _xdb($self);
};
}
@@ -194,7 +203,8 @@ sub query {
$self->{over_ro}->recent($opts);
} else {
my $qp = qp($self);
- my $query = $qp->parse_query($query_string, $QP_FLAGS);
+ my $qp_flags = $self->{qp_flags};
+ my $query = $qp->parse_query($query_string, $qp_flags);
$opts->{relevance} = 1 unless exists $opts->{relevance};
_do_enquire($self, $query, $opts);
}
diff --git a/t/search.t b/t/search.t
index c063620..538baef 100644
--- a/t/search.t
+++ b/t/search.t
@@ -30,6 +30,7 @@ my $ro = PublicInbox::Search->new($git_dir);
my $rw_commit = sub {
$rw->commit_txn_lazy if $rw;
$rw = PublicInbox::SearchIdx->new($git_dir, 1);
+ $rw->{qp_flags} = 0; # quiet a warning
$rw->begin_txn_lazy;
};
--
EW
^ permalink raw reply related [relevance 7%]
* [PATCH 00/26] xcpdb: ease Xapian DB format migrations
@ 2019-05-23 9:36 6% Eric Wong
2019-05-23 9:36 7% ` [PATCH 04/26] search: reenable phrase search on non-chert Xapian Eric Wong
0 siblings, 1 reply; 2+ results
From: Eric Wong @ 2019-05-23 9:36 UTC (permalink / raw)
To: meta
I've noticed performance problems in Xapian's old chert
backend which seem alleviated with the new glass backend;
particularly related to phrase searches.
Unfortunately, the tool distributed with Xapian for updating DB
formats, copydatabase(1), is extremely slow and blocking updates
for hours at a time to perform the migration is not acceptable.
(That's right, "copydatabase" is NOT a Postgres command!)
So, I've written "public-inbox-xcpdb" and gotten it to perform
the bulk copy operation without holding inbox.lock and have it
deal gracefully with Xapian DB modifications. xcpdb is still
slow, but I've (finally!) implemented partial reindexing to
allow it to minimize the lock time and not stall -mda or -watch
processes while it is working.
There's a bunch of cleanups along the way, too; and it should
make future changes to repartition the Xapian DB on existing v2
inboxes easier.
Eric Wong (26):
t/convert-compact: skip on missing xapian-compact(1)
v1writable: retire in favor of InboxWritable
doc: document the reason for --no-renumber
search: reenable phrase search on non-chert Xapian
xapcmd: new module for wrapping Xapian commands
admin: hoist out resolve_inboxes for -compact and -index
xapcmd: support spawn options
xcpdb: new tool which wraps Xapian's copydatabase(1)
xapcmd: do not cleanup on errors
admin: move index_inbox over
xcpdb: implement using Perl bindings
xapcmd: xcpdb supports compaction
v2writable: hoist out log_range sub for readability
xcpdb: use fine-grained locking
xcpdb: implement progress reporting
xcpdb: cleanup error handling and diagnosis
xapcmd: avoid EXDEV when finalizing changes
doc: xcpdb: update to reflect the current state
xapcmd: use "print STDERR" for progress reporting
xcpdb: show re-indexing progress
xcpdb: remove temporary directories on aborts
compact: reuse infrastructure from xcpdb
xcpdb|compact: support some xapian-compact switches
xapcmd: cleanup on interrupted xcpdb "--compact"
xcpdb|compact: support --jobs/-j flag like gmake(1)
xapcmd: do not reset %SIG until last Xtmpdir is done
Documentation/include.mk | 6 +-
Documentation/public-inbox-v1-format.pod | 4 +
Documentation/public-inbox-v2-format.pod | 4 +
Documentation/public-inbox-xcpdb.pod | 57 ++++
MANIFEST | 4 +-
lib/PublicInbox/Admin.pm | 66 ++++
lib/PublicInbox/InboxWritable.pm | 35 ++-
lib/PublicInbox/Search.pm | 48 +--
lib/PublicInbox/SearchIdx.pm | 34 ++-
lib/PublicInbox/V1Writable.pm | 34 ---
lib/PublicInbox/V2Writable.pm | 109 ++++---
lib/PublicInbox/Xapcmd.pm | 370 +++++++++++++++++++++++
script/public-inbox-compact | 102 +------
script/public-inbox-index | 102 +------
script/public-inbox-init | 13 +-
script/public-inbox-xcpdb | 19 ++
t/cgi.t | 4 +-
t/convert-compact.t | 4 +
t/indexlevels-mirror.t | 27 +-
t/init.t | 4 +-
t/nntpd.t | 15 +-
t/search.t | 1 +
t/v2mirror.t | 1 +
23 files changed, 740 insertions(+), 323 deletions(-)
create mode 100644 Documentation/public-inbox-xcpdb.pod
delete mode 100644 lib/PublicInbox/V1Writable.pm
create mode 100644 lib/PublicInbox/Xapcmd.pm
create mode 100755 script/public-inbox-xcpdb
--
EW
^ permalink raw reply [relevance 6%]
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2019-05-23 9:36 6% [PATCH 00/26] xcpdb: ease Xapian DB format migrations Eric Wong
2019-05-23 9:36 7% ` [PATCH 04/26] search: reenable phrase search on non-chert Xapian Eric Wong
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