> On Oct 12, 2022, at 9:25 AM, Frédéric Goudal
> <[email protected]> wrote:
>
> The behaviour that seems to occurs is that the logging sometimes stop
> (nothing more to do it seems) and when it stops the servers are in sync. So
> it seems the sync operations are very slow. Of course I do not log on normal
> operation.
>
> The directory as something like 70k entries (180Mb for the mdb file).
> Servers have plenty of memory :
> free
> total used free shared buff/cache available
> Mem: 8148668 3445380 125972 500 4577316
> 4390168
> Swap: 2009084 183552 1825532
>
> Servers are on an vmware cluster, from the vmware point of view cpu usage is
> very low. OS is ubuntu 20.04
>
> I don’t know where to dig…
Hi,
Where I’d start is to quantify how far out of sync they’re getting. A good
tool for that is the slapd watcher. It calculates based on contextCSN’s and
also provides stats from the monitor database.
```
ldap://m02
Entries Bind Unbind Search Compare Modify
ModDN Add Delete Abandon Extended
Num 578764 502 1 44492 1 1
0 1805517 1515081 0 102
Num/s 0.00 0.00 0.00 0.19 0.00 0.00
0.00 0.00 0.00 0.00 0.00
contextCSN: 20221011141123.463727Z#000000#001#000000 actv@2022-10-10 13:08:15,
idle@2022-10-11 19:16:45
contextCSN: 20221011141123.851236Z#000000#002#000000 actv@2022-10-10 13:08:15,
ahead 16:17:51, max delta 16:17:51
ldap://m01, late@2022-10-10 21:53:43
Entries Bind Unbind Search Compare Modify
ModDN Add Delete Abandon Extended
Num 944921 250 1 6340 1 1
0 1010062 537473 0 102
Num/s -0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
contextCSN: 20221010215333.012374Z#000000#001#000000 actv@2022-10-10 13:08:15,
behind 16:17:50, max delta 16:17:50
contextCSN: 20221010215333.015837Z#000000#002#000000 actv@2022-10-10 13:08:15
```
# Install the SLAPD Replication Watcher
## This is work-in-progress
1. Perform the following:
```
yum install gcc -y
git clone https://github.com/openldap/openldap.git
cd openldap
./configure
make depend
cd libraries
make -j2
cd ../tests/progs/
make slapd-watcher
```
2. Run from openldap/tests/progs
```
./slapd-watcher -b “dc=example,dc=com" ldap://host1 ldap://host2
```
—
Shawn
