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Diffstat (limited to 'src/smtpstone/hashed-deferred')
| -rw-r--r-- | src/smtpstone/hashed-deferred | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/smtpstone/hashed-deferred b/src/smtpstone/hashed-deferred new file mode 100644 index 0000000..93f0e12 --- /dev/null +++ b/src/smtpstone/hashed-deferred @@ -0,0 +1,37 @@ +Delivering 1000 deferred messages over the loopback transport, +outbound concurrency 10. smtp-sink pipelining disabled. Machine is +P230, BSD/OS 3.1, 64MB memory. + +hashing is 16 directories per level + +flat deferred queue + + start: Sun Feb 21 16:42:37 EST 1999 + done: Feb 21 16:44:35 + time: 1:58 = 118 seconds + + start: Sun Feb 21 16:48:01 EST 1999 + done: Feb 21 16:49:51 + time: 1:50 = 110 seconds + +hashed deferred queue, depth=1 (16 directories) + + start: Sun Feb 21 17:29:36 EST 1999 + done: Feb 21 17:31:32 + time: 1:56 = 116 seconds + + start: Sun Feb 21 17:33:36 EST 1999 + done: Feb 21 17:35:24 + time: 1:48 = 108 seconds + + start: Sun Feb 21 17:37:08 EST 1999 + done: Feb 21 17:39:02 + time: 1:52 = 112 seconds + +Hashing does not slow down deliveries. + +However the problem is scanning an empty deferred queue. On an idle +machine, it takes some 5 seconds to scan an empty depth=2 deferred +queue unless the blocks happen to be cached. During those 5 seconds +the queue manager will not pay attention to I/O from delivery +agents, which is bad. |