The works of extremely slow DB_REPMGR_ACKS_NONE policy

I run the replication group with 3 knots and ack policy set to DB_REPMGR_ACKS_NONE. I discovered, that the Scriptures are very slow, about ten times slower than the policy of DB_REPMGR_ACKS_QUORUM. I wonder what is the reason?
I use the 5.1 version of Berkeley DB. I also activated the diagnostic replication. Here are some samples of newspaper:
Master:
...
[1300377648:665288] [29653/140552691242768] the environment error: lease_check: eid 0 valid 0, lease_lsn [1] [145024]
[1300377648:665301] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:665324] [29653/140552691242768] the environment error: valid for 1, min 1
[1300377648:665789] [29653/140552691242768] the environment error: lease_check: try curtime 0 min_leases 1 1300377648 665789000, maxLSN [1] [145024]
[1300377648:665809] [29653/140552691242768] the environment error: lease_check: eid 0 valid 0, lease_lsn [1] [145024]
[1300377648:665820] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:665831] [29653/140552691242768] the environment error: valid for 1, min 1
[1300377648:665861] [29653/140552691242768] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_send_message: msgv = 5 logv 17 gen = 1 eid - 1, Journal type, LSN [1] [145168]
[1300377648:666193] [29653/140552691242768] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_send_message: msgv = 5 logv 17 gen = 1 eid - 1, Journal type, LSN [1] [145288]
[1300377648:666232] [29653/140552691242768] the environment error: lease_check: try curtime 0 min_leases 1 1300377648 666232000, maxLSN [1] [145024]
[1300377648:666249] [29653/140552691242768] the environment error: lease_check: eid 0 valid 0, lease_lsn [1] [145024]
[1300377648:666260] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:666272] [29653/140552691242768] the environment error: valid for 1, min 1
[1300377648:666290] [29653/140552691242768] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_send_message: msgv = 5 logv 17 gen = 1 eid - 1, the type of journal, perm [145358] rental hunting LSN [1]
[1300377648:666580] [29653/140552691242768] the environment error: lease_check: try curtime 0 min_leases 1 1300377648 666580000, maxLSN [1] [145358]
[1300377648:666599] [29653/140552691242768] the environment error: lease_check: eid 0 valid 0, lease_lsn [1] [145024]
[1300377648:666610] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:666621] [29653/140552691242768] the environment error: lease_check: eid 0 valid 1, lease_lsn [1] [145024]
[1300377648:666631] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:666641] [29653/140552691242768] the environment error: valid 0, min 1
[1300377648:666723] [29653/140552691242768] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_send_message: msgv = 5 logv 17 gen = 1 eid - 1, the type of log, perm [145358] rental LSN [1]
[1300377648:666761] [29653/140552691242768] the environment error: lease_check: try 1 min_leases 1 1300377648 666761000 curtime, maxLSN [1] [145358]
[1300377648:666777] [29653/140552691242768] the environment error: lease_check: eid 0 valid 0, lease_lsn [1] [145024]
[1300377648:666813] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:666824] [29653/140552691242768] the environment error: lease_check: eid 0 valid 1, lease_lsn [1] [145024]
[1300377648:666835] [29653/140552691242768] the environment error: lease_check: 1300377677 664194000 endtime
[1300377648:666845] [29653/140552691242768] the environment error: valid 0, min 1
[1300377648:666895] [29653/140552691242768] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_send_message: msgv = 5 logv 17 gen = 1 eid - 1, the type of log, perm [145358] rental LSN [1]
[1300377648:706266] [29653/140552749995792] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_process_message: msgv = 5 logv 17 gen = 1 eid 1, type lease_grant, LSN [1] [145358]
[1300377648:706296] [29653/140552749995792] the environment error: lease_grant: grant a msg 1300377648 666289000
[1300377648:706309] [29653/140552749995792] the environment error: lease_grant: eid 1, start 1300377648 666289000 end 1300377678 666289000, duration 30 0
[1300377648:706322] [29653/140552749995792] the environment error: lease_grant: eid 1, lease_lsn [1] [145358]
[1300377648:706413] [29653/140552741603088] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [145358]
[1300377648:706434] [29653/140552741603088] the environment error: lease_grant: grant a msg 1300377648 666289000
[1300377648:706446] [29653/140552741603088] the environment error: lease_grant: eid 0, start 1300377648 666289000 end 1300377678 666289000, duration 30 0
[1300377648:706458] [29653/140552741603088] the environment error: lease_grant: eid 0, lease_lsn [1] [145358]
[1300377648:706470] [29653/140552741603088] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_process_message: msgv = 5 logv 17 gen = 1 eid 1, type lease_grant, LSN [1] [145358]
[1300377648:706486] [29653/140552741603088] the environment error: lease_grant: grant a msg 1300377648 666723000
[1300377648:706497] [29653/140552741603088] the environment error: lease_grant: eid 1, start 1300377648 666723000 end 1300377678 666723000, duration 30 0
[1300377648:706511] [29653/140552741603088] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [145358]
[1300377648:706527] [29653/140552741603088] the environment error: lease_grant: grant a msg 1300377648 666895000
[1300377648:706538] [29653/140552741603088] the environment error: lease_grant: eid 0, start 1300377648 666895000 end 1300377678 666895000, duration 30 0
[1300377648:706552] [29653/140552741603088] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [145358]
[1300377648:706567] [29653/140552741603088] the environment error: lease_grant: grant a msg 1300377648 666895000
[1300377648:706600] [29653/140552749995792] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta1 rep_process_message: msgv = 5 logv 17 gen = 1 eid 1, type lease_grant, LSN [1] [145358]
...
one of the lines:
...
[1300377639:653736] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the newspaper, perm [140832] type hunting lease LSN [1]
[1300377639:653752] [29682/140349762348816] the environment error: rep_apply: Set apply_th 1
[1300377639:654013] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [140832] LSN lease [1]
[1300377639:654213] [29682/140349762348816] the environment error: rep_apply: decrement apply_th 0 [1] [140976]
[1300377639:654235] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [140832] nobuf
[1300377639:654296] [29682/140349762348816] error in the environment: ISPERM [1] [140832] return cmp = 0
[1300377639:654304] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [140832] nobuf
[1300377639:654381] [29682/140349753956112] error in the environment: ISPERM [1] [140832] return cmp = - 1
[1300377639:654315] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [140832] LSN lease [1]
[1300377639:654657] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [140832] nobuf
[1300377639:654695] [29682/140349762348816] error in the environment: ISPERM [1] [140832] return cmp = - 1
[1300377640:616800] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [140976]
[1300377640:616832] [29682/140349753956112] the environment error: rep_apply: Set apply_th 1
[1300377640:616849] [29682/140349753956112] the environment error: rep_apply: decrement apply_th 0 [1] [141096]
[1300377640:653564] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141096]
[1300377640:653605] [29682/140349753956112] the environment error: rep_apply: Set apply_th 1
[1300377640:653624] [29682/140349753956112] the environment error: rep_apply: decrement apply_th 0 [1] [141186]
[1300377640:653639] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [141186] rental hunting LSN [1]
[1300377640:653656] [29682/140349753956112] the environment error: rep_apply: Set apply_th 1
[1300377640:653859] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [141186] rental LSN [1]
[1300377640:654108] [29682/140349753956112] the environment error: rep_apply: decrement apply_th 0 [1] [141298]
[1300377640:654129] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [141186] nobuf
[1300377640:654191] [29682/140349753956112] error in the environment: ISPERM [1] [141186] return cmp = 0
[1300377640:654209] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [141186] rental LSN [1]
[1300377640:654228] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [141186] nobuf
[1300377640:654261] [29682/140349753956112] error in the environment: ISPERM [1] [141186] return cmp = - 1
[1300377640:654345] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [141186] nobuf
[1300377640:654386] [29682/140349762348816] error in the environment: ISPERM [1] [141186] return cmp = - 1
[1300377641:628410] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141298]
[1300377641:628445] [29682/140349753956112] the environment error: rep_apply: Set apply_th 1
[1300377641:628463] [29682/140349753956112] the environment error: rep_apply: decrement apply_th 0 [1] [141437]
[1300377641:665512] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141437]
[1300377641:665554] [29682/140349762348816] the environment error: rep_apply: Set apply_th 1
[1300377641:665572] [29682/140349762348816] the environment error: rep_apply: decrement apply_th 0 [1] [141509]
[1300377641:665589] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141509]
[1300377641:665605] [29682/140349762348816] the environment error: rep_apply: Set apply_th 1
[1300377641:665618] [29682/140349762348816] the environment error: rep_apply: decrement apply_th 0 [1] [141629]
[1300377641:665631] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141629]
[1300377641:665647] [29682/140349762348816] the environment error: rep_apply: Set apply_th 1
[1300377641:665659] [29682/140349762348816] the environment error: rep_apply: decrement apply_th 0 [1] [141701]
[1300377641:665672] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [141701] rental hunting LSN [1]
[1300377641:665688] [29682/140349762348816] the environment error: rep_apply: Set apply_th 1
[1300377641:665993] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [141701] rental LSN [1]
[1300377641:666122] [29682/140349762348816] the environment error: rep_apply: decrement apply_th 0 [1] [141845]
[1300377641:666141] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [141701] nobuf
[1300377641:666200] [29682/140349762348816] error in the environment: ISPERM [1] [141701] return cmp = 0
[1300377641:666218] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, the type of log, perm [141701] rental LSN [1]
[1300377641:666236] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [141701] nobuf
[1300377641:666270] [29682/140349762348816] error in the environment: ISPERM [1] [141701] return cmp = - 1
[1300377641:666348] [29682/140349753956112] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_send_message: msgv = 5 logv 17 gen = 1 eid 0, type lease_grant, LSN [1] [141701] nobuf
[1300377641:666389] [29682/140349753956112] error in the environment: ISPERM [1] [141701] return cmp = - 1
[1300377642:632755] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141845]
[1300377642:632789] [29682/140349762348816] the environment error: rep_apply: Set apply_th 1
[1300377642:632815] [29682/140349762348816] the environment error: rep_apply: decrement apply_th 0 [1] [141965]
[1300377642:669472] [29682/140349762348816] the environment error: / home/gawlinska/rfslocal/execfiles/env_meta2 rep_process_message: msgv = 5 logv 17 gen = 1 eid 0, LSN, Journal of type [1] [141965]
...

I'm looking forward to your reply.

See you soon,.
Edith

Published by: Edith on 2011-03-17 09:06

Published by: Edith on 2011-03-17 09:07

Edith says:
I turned off master leases and chose heartbeats instead of. It seems that politics DB_REPMGR_ACKS_NONE works fine now.
So what's the problem with my master leases help?

Everything goes well with your use of the main lease. It is expected that master leases slow performance because of the additional expectations and communications between the sites they do.

You can assess whether the performance of master leases are useful for your application. The major goal of master leases should provide readings that are authorities on the main site. This means that reads on the site of master returns only replicated data in a sustainable way. Many applications don't require this level of severity on their readings of masters.

Note that the heart beats have a different goal, which is to allow a client detect the loss of his connection to the captain more quickly.

I get lower performance with DB_REPMGR_ACKS_NONE as DB_REPMGR_ACKS_ONE or DB_REPMGR_ACKS_QUORUM.

Regardless of the leases, there may be a performance difference between the ACK_NONE and other policies that use receipts. The policies that use acknowledgements must wait as receipts and tend to spread their masters transactions accordingly. ACK_NONE is used, there is no waiting for acknowledgements and it becomes more possible for the master to generate transactions more quickly that some customers can treat them.

When you add leases to ACK_NONE, a customer who is farther behind will take more time to grant its leases. I can't leave the pieces of replication output you provided if it is without a doubt what is happening, but it is possible.

Paula Bingham
Oracle

Tags: Database

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    What firmware are you running?

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    Hello

    ·         There were several updates installed?

    ·         Have you checked the problem in safe mode?

    Check to see if the following is useful.

    Method 1: Start the computer in safe mode and see if the problem persists. Report of the results.

    Method 2: Log on to the computer manufacturer site and check if you have the latest drivers installed.

    See also:

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    Q.

    Hello

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  • extremely slow response on mac, used to work properly, the difficulty?

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  • My Mac Mini is extremely slow and any video will start but soon stops and intermittently starts and stop immediately. What is the reason?

    My Mac Mini (end 2012) 2.5 ghz memory 8 GB Yosemite 10.10.5 is extremely slow. I read a few articles on communities, but unable to solve the problem. I plan to upgrade memory soon. In addition, a video game doesn't quite work. It starts and stops in 5 seconds and restarts it for a few seconds and stops completely. An advisor to fix the problem will be appreciated.

    When you see a beachball cursor or the slowness is particularly bad, note the exact time: hour, minute, second.

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    Copy messages to the Clipboard by pressing Control-C key combination. Paste into a reply to this message by pressing command + V.

    The journal contains a large amount of information, almost all this is useless to solve any particular problem. When you post a journal excerpt, be selective. A few dozen lines are almost always more than enough.

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    Please do not post screenshots of log messages - text poster.

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    When you post the journal excerpt, an error message may appear on the web page: "you include content in your post that is not allowed", or "the message contains invalid characters." It's a bug in the forum software. Thanks for posting the text on Pastebin, then post here a link to the page you created.

    If you have an account on Pastebin, please do not select private in exposure menu to paste on the page, because no one else that you will be able to see it.

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    Back up your Mac if you have not already done so. Read https://www.apple.com/support/backup/to learn how to do this. To learn how to use Time Machine read to use Time Machine to back up or restore your Mac.

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    Hi Brian,.

    You have made any changes to your computer recently?

    I suggest you to follow the steps and check if it helps.

    Method 1: Follow the link and check if that helps.
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    Method 2: You can also follow the link and check if it helps.
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    Nice day!

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    Andrew

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