[PATCH 16/21] sharedkv: do not set cache_size by default

[Eric Wong]

These DBs will probably be too small to be worth increasing the
cache size of.
---
 lib/PublicInbox/SharedKV.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/SharedKV.pm b/lib/PublicInbox/SharedKV.pm
index b0588060..d65c3158 100644
--- a/lib/PublicInbox/SharedKV.pm
+++ b/lib/PublicInbox/SharedKV.pm
@@ -27,7 +27,9 @@ sub dbh {
                });
                my $opt = $self->{opt} // {};
                $dbh->do('PRAGMA synchronous = OFF') if !$opt->{fsync};
-               $dbh->do('PRAGMA cache_size = '.($opt->{cache_size} || 80000));
+               if (my $s = $opt->{cache_size}) {
+                       $dbh->do("PRAGMA cache_size = $s");
+               }
                $dbh->do('PRAGMA journal_mode = '.
                                ($opt->{journal_mode} // 'WAL'));
                $dbh->do(<<'');
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