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Re: Physical Log size

Posted By: DIRK MOOLMAN
Date: Wednesday, 4 September 2019, at 7:10 a.m.

In Response To: Re: Physical Log size (BENJAMIN THOMPSON)

Thank you for your response. I will have to RTFM regarding this. A bit over my head right now.
I will share the onstat -g ckp so long:
(at the bottom it says, physical log might be too small)
onstat -g ckp
IBM Informix Dynamic Server Version 12.10.FC9W1 -- On-Line -- Up 13 days 08:48:59 -- 227111520 Kbytes
AUTO_CKPTS=On RTO_SERVER_RESTART=Off
Critical Sections Physical Log Logical Log
Clock Total Flush Block # Ckpt Wait Long # Dirty Dskflu Total Avg Total Avg
Interval Time Trigger LSN Time Time Time Waits Time Time Time Buffers /Sec Pages /Sec Pages /Sec
790824 11:29:09 CKPTINTVL 13144:0xb237f8c 4.5 4.1 0.0 50 0.0 0.2 0.3 55070 13344 367615 1127 91 0
790825 11:34:19 CKPTINTVL 13144:0xb25273c 5.2 4.8 0.0 48 0.0 0.3 0.3 45834 9606 231831 750 27 0
790826 11:39:27 CKPTINTVL 13144:0xb264424 2.8 2.5 0.0 37 0.0 0.1 0.2 80756 31708 142367 457 18 0
790827 11:44:41 CKPTINTVL 13144:0xb2ba4bc 7.6 7.2 0.0 43 0.0 0.2 0.2 84469 11689 127533 412 86 0
790828 11:49:44 CKPTINTVL 13144:0xb2cc2ac 2.3 2.0 0.0 43 0.0 0.2 0.2 75226 37138 157719 512 18 0
790829 11:54:50 CKPTINTVL 13144:0xb2f13b4 4.3 4.0 0.0 49 0.0 0.2 0.2 74725 18888 349106 1148 37 0
790830 11:59:56 CKPTINTVL 13144:0xb30f13c 3.4 3.1 0.0 48 0.0 0.2 0.2 37980 12436 534563 1741 30 0
790831 12:05:11 CKPTINTVL 13144:0xb323c58 6.2 4.8 0.0 92 0.0 0.9 1.1 53189 11091 818213 2614 20 0
790832 12:10:22 CKPTINTVL 13144:0xb3348b0 5.7 5.1 0.0 60 0.0 0.2 0.3 44907 8763 498561 1603 17 0
790833 12:15:29 CKPTINTVL 13144:0xb371084 4.6 4.2 0.0 44 0.0 0.2 0.3 70508 16985 564826 1833 61 0
790834 12:20:37 CKPTINTVL 13144:0xb392e74 4.9 4.6 0.0 40 0.0 0.2 0.2 42949 9320 595028 1931 33 0
790835 12:25:51 CKPTINTVL 13144:0xb3f0b0c 8.6 8.2 0.0 31 0.0 0.2 0.3 50988 6205 493491 1591 95 0
790836 12:31:05 CKPTINTVL 13144:0xb406230 4.3 4.0 0.0 25 0.0 0.1 0.2 55619 13844 365788 1150 22 0
790837 12:36:10 CKPTINTVL 13144:0xb41beb4 3.4 3.1 0.0 21 0.0 0.2 0.3 44075 14363 216661 708 21 0
790838 12:41:17 CKPTINTVL 13144:0xb483018 6.4 6.0 0.0 24 0.0 0.1 0.2 61208 10166 105972 348 104 0
790839 12:46:29 CKPTINTVL 13144:0xb49b0e8 8.3 8.0 0.0 22 0.0 0.2 0.2 52890 6589 135857 438 24 0
790840 12:51:36 CKPTINTVL 13144:0xb86e2bc 6.9 6.6 0.0 18 0.0 0.1 0.2 58071 8861 101357 328 979 3
790841 12:56:45 CKPTINTVL 13144:0xb8828fc 5.9 5.5 0.0 24 0.0 0.1 0.2 54951 10042 180011 580 20 0
790842 13:02:10 CKPTINTVL 13144:0xb899710 24.2 23.8 0.0 39 0.0 0.2 0.3 62783 2638 294797 963 23 0
790843 13:06:50 CKPTINTVL 13144:0xb8b1e54 4.7 4.2 0.0 24 0.0 0.2 0.3 55090 13048 617363 2057 24 0
Max Plog Max Llog Max Dskflush Avg Dskflush Avg Dirty Blocked
pages/sec pages/sec Time pages/sec pages/sec Time
29703 1534 1985 9331 33 0
Based on the current workload, the physical log might be too small
to accommodate the time it takes to flush the buffer pool during
checkpoint processing. The server might block transactions during checkpoints.
If the server blocks transactions, increase the physical log size to
at least 240000240 KB.

Messages In This Thread

Physical Log size
DIRK MOOLMAN -- Tuesday, 3 September 2019, at 4:31 a.m.
- Re: Physical Log size
  DIRK MOOLMAN -- Tuesday, 3 September 2019, at 4:41 a.m.
- Re: Physical Log size
  BENJAMIN THOMPSON -- Tuesday, 3 September 2019, at 12:27 p.m.
  - Re: Physical Log size
    DIRK MOOLMAN -- Wednesday, 4 September 2019, at 7:10 a.m.
    - Re: Physical Log size
      BENJAMIN THOMPSON -- Wednesday, 4 September 2019, at 7:27 a.m.

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