Philip Martin <philip.mar...@wandisco.com> writes: > That's using the sync option on the NFS server. Using async > > Checkout using 1.6: > Elapsed: 73s CPU: 16s
[...] > Checkout using 1.7 > Elapsed: 180s CPU: 26s By comparison the same checkout to a local disk takes about 5s elapsed for both 1.6 and 1.7. I tried an experiment with the update editor used by checkout. At present it inserts a not-present NODES row for each file in add_file() and then replaces it with a normal NODES row in close_file(). I removed the code that inserts the not-present row, the checkout still works provided it runs to completeion. This change removes one transaction per-file from the checkout, and reduces the elapsed time by 27s or 15%. So to get better performance on network disks we have to remove or combine transactions. -- Philip
