Hi Quanah,

I did revert all my changes of openldap and try increasing the property from slapd.ldif using olcDBMaxSize.

below are my observations, if i try to set the value from property, i dont understand from where the value *1406945XXXXXX *and getting set.

Please check the details mentioned.

*1) olcDbMaxSize: 10485760*

mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb"

Environment Info Map address: 0000000000000000 Map size: 140694549168128 Page size: 4096 Max pages: 34349255168 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

slapd.exe -T add -F ..\slapd.d -l backupContent.ldif

5e37a371 mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a371 backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed

*2) olcDbMaxSize: 1048576*

slapd.exe -T add -F ..\slapd.d -l backupContent.ldif

5e37a5ef mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a5ef backend_startup_one (type=mdb, suff*ix="o=abc.net http://abc.net"): bi_db_open failed! (87)* slap_startup failed

mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb"

Environment Info Map address: 0000000000000000 Map size: 140694539730944 Page size: 4096 Max pages: 34349252864 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

*3) olcDbMaxSize: 1024*

slapd.exe -T add -F ..\slapd.d -l backupContent.ldif

5e37a7fd mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a7fd backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed

mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb"

Environment Info Map address: 0000000000000000 Map size: 140694538683392 Page size: 4096 Max pages: 34349252608 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

*5) olcDbMaxSize 10*

slapd.exe -T add -F ..\slapd.d -l backupContent.ldif

5e37a92b mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a92b backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed

mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb"

Environment Info Map address: 0000000000000000 Map size: 140694538682378 Page size: 4096 Max pages: 34349252608 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

*6) olcDbMaxSize 1*

slapd.exe -T add -F ..\slapd.d -l backupContent.ldif

5e37a92b mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a92b backend_startup_one (type=mdb, suffix=*"o=abc.net http://abc.net"): bi_db_open failed! (87)* slap_startup failed

mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb"

Environment Info Map address: 0000000000000000 Map size: *140694538682369* Page size: 4096 Max pages: 34349252608 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

7) olcDbMaxSize not set

mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb"

Environment Info Map address: 0000000000000000 Map size: 1048576 Page size: 4096 Max pages: 256 Number of pages used: 254 Last transaction ID: 104 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

On Fri, Jan 31, 2020 at 12:56 PM Quanah Gibson-Mount quanah@symas.com wrote:

--On Friday, January 31, 2020 12:09 PM +0530 Vijay Kumar pasumarthivijaykumar@gmail.com wrote:

...

I could see some stats from mdb-stat tool as mentioned below,

mdb_stat.exe -rne "C:\openldap\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 268435456 (we have set the value as ‭104,857,600,000,000‬ in mdb.c and back_mdb.h files, but it has taken only 256 MB, not sure why?)

You should be making NO CHANGES to the source code *AT ALL*. The *ONLY* thing you should be doing is setting a maxsize parameter correctly in the slapd configuration. PERIOD. I don't know how to be any clearer than this.

Regards, Quanah

--

Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: http://www.symas.com