Hi again! I've implemented a Nagios compatible monitor for the MDB freespace, but I'm trying to understand: The "unused pages" are non-fragmented, obviously The "free pages" may be scattered all over, but are completely free May there exist partially free pages that are not accounted in the monitor info? Also for a huge change request are contiguous pages needed, or is only the number of available pages important?
Does MDB care about fragmentation at all? Kind regards, Ulrich Windl > -----Original Message----- > From: Howard Chu <h...@symas.com> > Sent: Friday, April 25, 2025 6:16 PM > To: Windl, Ulrich <u.wi...@ukr.de>; openldap-technical@openldap.org > Subject: [EXT] Re: MDB monitoring: How many free pages actually? > > Windl, Ulrich wrote: > > Hi, > > > > > > > > Considering this monitoring information, I wonder: > > > > olmMDBPagesMax: 12800 > > olmMDBPagesUsed: 9229 > > olmMDBPagesFree: 3810 > > > Is the number of actual free pages 12800 - 9229 + 3810, i.e. "unallocated > (12800 - 9229)" plus "usable" (3810)? > > Yes. "Pages Free" are used pages that are reusable. > > > How many free pages are needed before updates stop working? > > That depends on the size of an update. > > > -- > -- Howard Chu > CTO, Symas Corp. http://www.symas.com > Director, Highland Sun http://highlandsun.com/hyc/ > Chief Architect, OpenLDAP http://www.openldap.org/project/
