Hi! Trying to convert my syncrepl configuration to a delta syncrepl configuration, the slave runs out of accesslog space during initial sync. For the main database about 30MB should be enough, but I configured 50MB, also for the accesslog files. It seems sync continues even if accesslog periodically complains like this:
slapd[13951]: => mdb_idl_insert_keys: c_put id failed: MDB_MAP_FULL: Environment mapsize limit reached (-30792) slapd[13951]: conn=-1 op=0 accesslog_response: got result 0x50 adding log entry reqStart=20250314110032.000187Z,cn=changelog-1 >From stat I guess that accesslog needs at least three times as much space as >the main database does: # stat /var/lib/ldap/data.mdb /var/lib/ldap/changelog-1/data.mdb File: /var/lib/ldap/data.mdb Size: 22888448 Blocks: 44704 IO Block: 4096 regular file Device: 33h/51d Inode: 259467 Links: 1 Access: (0600/-rw-------) Uid: ( 76/ ldap) Gid: ( 70/ ldap) Access: 2025-03-14 11:57:46.303713632 +0100 Modify: 2025-03-14 12:01:08.417328586 +0100 Change: 2025-03-14 12:01:08.417328586 +0100 Birth: 2025-03-14 11:57:46.303713632 +0100 File: /var/lib/ldap/changelog-1/data.mdb Size: 52424704 Blocks: 102392 IO Block: 4096 regular file Device: 33h/51d Inode: 259471 Links: 1 Access: (0600/-rw-------) Uid: ( 76/ ldap) Gid: ( 70/ ldap) Access: 2025-03-14 11:57:46.323713395 +0100 Modify: 2025-03-14 12:01:08.425328492 +0100 Change: 2025-03-14 12:01:08.425328492 +0100 Birth: 2025-03-14 11:57:46.323713395 +0100 Shouldn't (assuming the sync happens entry-by-entry) the accesslog have about the same size as the main database after initial sync (when all databases were empty)? When setting the size of the accesslog database to twice the size of the database it succeeded which stats like this: # stat /var/lib/ldap/data.mdb /var/lib/ldap/changelog-1/data.mdb File: /var/lib/ldap/data.mdb Size: 22888448 Blocks: 44704 IO Block: 4096 regular file Device: 33h/51d Inode: 259514 Links: 1 Access: (0600/-rw-------) Uid: ( 76/ ldap) Gid: ( 70/ ldap) Access: 2025-03-14 12:39:01.278545521 +0100 Modify: 2025-03-14 12:45:03.558274733 +0100 Change: 2025-03-14 12:45:03.558274733 +0100 Birth: 2025-03-14 12:39:01.278545521 +0100 File: /var/lib/ldap/changelog-1/data.mdb Size: 89657344 Blocks: 175112 IO Block: 4096 regular file Device: 33h/51d Inode: 259518 Links: 1 Access: (0600/-rw-------) Uid: ( 76/ ldap) Gid: ( 70/ ldap) Access: 2025-03-14 12:39:01.298545286 +0100 Modify: 2025-03-14 12:45:03.566274639 +0100 Change: 2025-03-14 12:45:03.566274639 +0100 Birth: 2025-03-14 12:39:01.298545286 +0100 So the blocks in the accesslog are roughly four times (3.91 ) as much as in the original database. Is there any doc making statements about the proportion? (I'm a fan of "small is beautiful" instead of "bigger is better") Kind regards, Ulrich Windl
