Best Practices - Unidata/LDM GitHub Wiki

Size the product-queue (LDM registry parameters /queue/size and /queue/slots) sufficiently large so that the age of the oldest product in the queue is greater than the maximum latency parameter (/server/max-latency). Once you get close enough, set the /reconciliation-mode parameter to either increase queue or decrease maximum latency. The ldmadmin addmetrics and ldmadmin plotmetrics commands can help determine when you're close.

Have sufficient physical memory on the LDM computer to allow the product-queue to be completely contained in memory.

When practicable, have two REQUEST entries for the same data to two, different, upstream LDM-s.

Execute data-product ingesters via EXEC entries in the LDM configuration-file so that the LDM process-group will be signaled when a new product is inserted.

Consider splitting a large-volume REQUEST entry in the LDM configuration-file, ldmd.conf, into multiple, smaller, disjoint entries.

Favor doing your local processing of data-products by pqact(1) on a computer that's not relaying data.

If you process a lot of data-products locally on the computer via pqact(1), then consider having multiple EXEC pqact... entries in your LDM configuration-file -- each using a different, feedtype-specific pqact(1) configuration-file and having a different -f feedtype option. This will reduce the size of each pqact(1)'s configuration-file and, consequently, the time spent attempting to find a matching entry.