[SCIP] small gaps

[Marcus Daniels]

Hi,

I have a set of relaxed problems that find feasibility, run for a few seconds, and then get stuck as below.   There's no further branching and no further cuts, not even after an hour.    Depending on the problem the gap might be 0.01% or 0.80%.   Any suggestions on how to debug this or tune it to get to a zero gap?  I tried doing less frequent LP solves, but that also runs forever.

Thanks,

Marcus

 time | node  | left  |LP iter|LP it/n| mem |mdpt |frac |vars |cons |cols |rows |cuts |confs|strbr|  dualbound   | primalbound  |  gap
 97.1s|     1 |     0 |  1247 |     - | 156M|   0 |   2 |5502 |3048 |5502 |3067 |  20 |   0 |   0 | 1.524548e-02 | 1.528577e-02 |   0.26%
 97.1s|     1 |     2 |  1247 |     - | 157M|   0 |   2 |5502 |3048 |5502 |3067 |  20 |   0 |   2 | 1.524548e-02 | 1.528577e-02 |   0.26%

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.zib.de/pipermail/scip/attachments/20200127/9d47f4ca/attachment.html>