Hi, Art,

Recently, We found somehow our dostats running could ask Informix to add quite some extra virtual memory segments , 

1) Online log.

07/05/2026 22:18:31   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:19:47   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:22:52   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:27:34   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:28:41   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:31:10   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:33:17   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:34:29   Dynamically allocated new virtual shared memory segment (size 8000000KB)

07/05/2026 22:35:38   Dynamically allocated new virtual shared memory segment (size 8000000KB)

2)  onstat -g seg

IBM Informix Dynamic Server Version 14.10.FC8XO -- On-Line -- Up 4 days 18:55:52 -- 115673060Kbytes

2026-07-10 13:18:27

Segment Summary:

id         key        addr             size             ovhd     class blkused  blkfree

18         52614801   44000000         569851904        7119592  R     139124   0

19         52614802   65f74000         10240000000      120001944 V     230843   2269157

20         52614803   2c8514000        33911361536      1        B     8279141  0

21         52614804   aad979000        8192000000       96001896 V     24908    1975092

22         52614805   c95df9000        8192000000       96001896 V     24674    1975326

23         52614806   e7e279000        8192000000       96001896 V     24599    1975401

24         52614807   10666f9000       8192000000       96001896 V     24243    1975757

25         52614808   124eb79000       8192000000       96001896 V     24132    1975868

26         52614809   1436ff9000       8192000000       96001896 V     24000    1976000

27         5261480a   161f479000       8192000000       96001896 V     23815    1976185

28         5261480b   18078f9000       8192000000       96001896 V     23686    1976314

29         5261480c   19efd79000       8192000000       96001896 V     23538    1976462

Total:     -          -                118449213440     -        -     8866703  20051562

   (* segment locked in memory)

No reserve memory is allocated

3) our dostats version,

dostats -V

dostats_ng: Features Version 7.00 - NG, Source Revision: 1.61 !

        Copyright 2009 - 2016 by Art S. Kagel.

        License for private usage (including use by commercial enterprise

        for its own needs) is granted.  Commercial and exploitation rights   are reserved.

The server  is not busy, not much other jobs running there. 

Any tips or suggestions?

Thanks a lot!

Frank