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Eric Charles commented on MAILBOX-186: -------------------------------------- Sounds like a good plan. 2 comments: - In trunk, JPAProperty entity has only 'PROPERTY_LINE_NUMBER' attributed, but not PROPERTY_MSG_ID (which version are you using?) - We should fix this by adding @Index on the attributed for which we want an index in the JPAProperty class. Thx, Eric > Missing indices on JPA mailstore database results in poor mailbox listing as > the number of messages grows > --------------------------------------------------------------------------------------------------------- > > Key: MAILBOX-186 > URL: https://issues.apache.org/jira/browse/MAILBOX-186 > Project: James Mailbox > Issue Type: Bug > Components: jpa > Affects Versions: 0.4 > Reporter: Craig George > > We have an application which queries the IMAP store of Apache James 3 in the > following manner: > final Message[] messages = this.folder.getMessages(); > final FetchProfile fetchProfile = new FetchProfile(); > fetchProfile.add(Item.ENVELOPE); > fetchProfile.add(Item.FLAGS); > fetchProfile.add(Item.CONTENT_INFO); > fetchProfile.add(IMAPFolder.FetchProfileItem.HEADERS); > fetchProfile.add(IMAPFolder.FetchProfileItem.SIZE); > fetchProfile.add(UIDFolder.FetchProfileItem.UID); > this.folder.fetch(messages, fetchProfile); > When this query is performed on a folder with a large number of messages the > response times degrade very quickly. This is due to the following query being > run *for each* message: > SELECT t0.PROPERTY_ID, > t0.PROPERTY_LINE_NUMBER, > t0.PROPERTY_LOCAL_NAME, > t0.PROPERTY_NAME_SPACE, > t0.PROPERTY_VALUE > FROM MA_DIRECT_APACHE_JAMES.JAMES_MAIL_PROPERTY t0 > WHERE t0.MAILBOX_ID = :1 > AND t0.MAIL_UID = :2 > ORDER BY t0.PROPERTY_LINE_NUMBER ASC > The problem is that in the JAMES_MAIL_PROPERTY table only the > PROPERTY_LINE_ID column is indexed, implicity by virtue of the fact that it > is the primary key. The workaround is to add the following indexes on the > table: > CREATE INDEX I_JMS_MIL_PROPERTY_MSG_ID ON JAMES_MAIL_PROPERTY (MAILBOX_ID, > MAIL_UID); > CREATE INDEX I_JMS_MIL_PROPERTY_LINE_NUMBER ON JAMES_MAIL_PROPERTY > (PROPERTY_LINE_NUMBER); -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: server-dev-unsubscr...@james.apache.org For additional commands, e-mail: server-dev-h...@james.apache.org