Hi, I have an openldap instance that I'd like to migrate to arm64, just loading a mdb from an amd64 instance results in all filtered queries returning empty results, which is resolved by running slapindex. I've managed to get this to complete in reasonable time using an arm64 mac and a tmpfs volume to hold a smaller test mdb in memory, but I can't replicate this performance in the cloud and I can't fit the prod mdb into tmpfs and have enough memory to work with left over.
I've noticed that despite setting olcToolThreads high, it only ever pins one CPU, so I wonder if it's the difference in single threaded performance of my m1max mac vs a graviton2 instance? Is there any way to get slapindexing to use more than one cpu, or are there any other performance improvements you can suggest? I need it to complete within 6 hours maximum to fit into a change window. I'd prefer not to resort to running a parallel instance out of service and then swap the two over if it can be helped. It doesn't go at a consistent rate, but right now it looks like it'd take 2-3 days to complete. I'm passing -t and -q to slapindex. I'd appreciate any advice you could give.
