Trail record size & check frecuency for end of uncommitted transactions

Question

Hi, everyone,
Does anyone know if the trail record size can be changed from its default value of 4K?
What about how long the data pump process delays before searching for more data to proccess in its source trail while it waits for the end of a uncommitted transaction (which is 1 second)?

Answer 1

Thank you for your answer, MikeN
The delay I'm referring to cannot be set with EofDelay or EofDelayCSecs: these parameters establish how much time the Data Pump process sleeps when it has nothing new in its source trail. The delay that bothers me seems to happen when the Data Pump has nothing new in its source trail but it is in the middle of an open transaction processing.
I think is better explained with an example (which I think explains the goal of changing the record size too):
This is an excerpt for the Extract process trace:
*09:51:59.653622 write(20, "G\1\0\307H\0\0<E\4\0A\0F\5\377\2\361\361\317\21\232\265\300\0\0\0\0\0)h\20"..., 4096) = 4096* <----- Extract writes down the first 4K record of the transaction
09:51:59.653690 time(NULL) = 1349769119
09:51:59.653726 time(NULL) = 1349769119
09:51:59.653763 time(NULL) = 1349769119
09:51:59.653803 time(NULL) = 1349769119
09:51:59.653838 time(NULL) = 1349769119
09:51:59.653877 time(NULL) = 1349769119
09:51:59.653913 time(NULL) = 1349769119
09:51:59.653948 time(NULL) = 1349769119
09:51:59.653987 time(NULL) = 1349769119
09:51:59.654024 time(NULL) = 1349769119
09:51:59.654058 time(NULL) = 1349769119
09:51:59.654097 time(NULL) = 1349769119
09:51:59.654140 time(NULL) = 1349769119
09:51:59.654174 gettimeofday({1349769119, 654182}, NULL) = 0
09:51:59.654207 clock_gettime(CLOCK_REALTIME, {1349769119, 654216293}) = 0
09:51:59.654234 futex(0x9b62584, FUTEX_WAIT_PRIVATE, 957, {0, 999965707}) = 0
09:51:59.751502 futex(0x9b62568, FUTEX_WAKE_PRIVATE, 1) = 0
09:51:59.751554 llseek(19, 2722304, [2722304], SEEKSET) = 0
09:51:59.751608 futex(0x9b62534, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x9b62530, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
09:51:59.751682 nanosleep({0, 0}, NULL) = 0
*09:52:00.162689 write(20, "\0D\0\0O\0\0\0\30\0\0\0\0240000100050134977631"..., 2374) = 2374* <----- Extract writes down the remaining data for the transaction
And this is an excerpt of the corresponding Data Pump process trace:
09:51:59.653398 read(11, "F\0\4/0\0\1\3210\0\0\10GG\r\nTL\n\r1\0\0\2\0\0032\0\0\4 \0"..., 1048576) = 7604
09:51:59.653472 stat64("/stella_dat/ggate/tlstella/tl000195", 0xbfca2a0c) = -1 ENOENT (No such file or directory)
09:51:59.653543 nanosleep({0, 0}, NULL) = 0
09:51:59.653651 llseek(11, 0, [0], SEEKSET) = 0
*09:51:59.653543 nanosleep({0, 0}, NULL) = 0* <---- This is EOFDELAY: it's set to 0
09:51:59.653651 llseek(11, 0, [0], SEEKSET) = 0
*09:51:59.653709 read(11, "F\0\4/0\0\1\3210\0\0\10GG\r\nTL\n\r1\0\0\2\0\0032\0\0\4 \0"..., 1048576) = 11700* <----- Data Pump detects a new record in the source trail
09:51:59.653767 read(11, "", 1048576) = 0
09:51:59.653840 time(NULL) = 1349769119
09:51:59.653910 time(NULL) = 1349769119
09:51:59.653959 time(NULL) = 1349769119
09:51:59.654014 time(NULL) = 1349769119
09:51:59.654067 time(NULL) = 1349769119
09:51:59.654123 time(NULL) = 1349769119
09:51:59.654181 time(NULL) = 1349769119
09:51:59.654232 time(NULL) = 1349769119
09:51:59.654274 time(NULL) = 1349769119
09:51:59.654312 time(NULL) = 1349769119
09:51:59.654351 time(NULL) = 1349769119
09:51:59.654389 time(NULL) = 1349769119
09:51:59.654428 time(NULL) = 1349769119
09:51:59.654467 time(NULL) = 1349769119
09:51:59.654505 time(NULL) = 1349769119
09:51:59.654543 time(NULL) = 1349769119
09:51:59.654582 time(NULL) = 1349769119
09:51:59.654620 time(NULL) = 1349769119
09:51:59.654657 time(NULL) = 1349769119
09:51:59.654695 time(NULL) = 1349769119
09:51:59.654733 time(NULL) = 1349769119
09:51:59.654771 time(NULL) = 1349769119
09:51:59.654809 time(NULL) = 1349769119
09:51:59.654844 read(11, "", 1048576) = 0
*09:51:59.654881 nanosleep({1, 0}, NULL) = 0* <----- This is the 1 second delay that I want to get rid of
*09:52:00.655079 read(11, "\0D\0\0O\0\0\0\30\0\0\0\0240000100050134977631"..., 1048576) = 2374* <----- Data Pump reads the second record of the transaction