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Informix - Problem description
| Problem IT30983 | Status: Closed |
ON LINUX X86_64, SERVER CAN ASSERT INITIALIZING KAIO WITH -22 EINVAL FROM IO_QUEUE_INIT | |
| product: | |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 | |
| Problem description: | |
Consider this entry in /etc/sysctl.conf on linux x86_64:
fs.aio-max-nr = 6000000
Propagate the setting:
sysctl -p /etc/sysctl.conf
If you set the env variable KAIOON=500000, the server will fail
with following when you try to bring it online:
There appears to be an undoc'ed hard-coded OS value that is
limiting the server despite KAIOON being less than
fs.aio-max-nr:
11:58:23 requested number of KAIO events (5000000) exceeds
limit (3000000). using 3000000.
11:58:23 Assert Failed: initializing KAIO failed
11:58:23 IBM Informix Dynamic Server Version 12.10.FC7
11:58:23 Who: Session(1, login@host, 0, (nil))
Thread(137, kaio, 0, 1)
File: kaioapi.c Line: 298
11:58:23 Results: io_queue_init(3000000) failed returning
-22, errno = 0
11:58:23 stack trace for pid 21255 written to
/tmp/af.471dbbe
11:58:23 See Also: /tmp/af.471dbbe
11:58:27 initializing KAIO failed
11:58:28 io_queue_init(3000000) failed returning -22, errno
= 0
11:58:28 Assert Failed: kaiothread() ERROR
A similar error can be observed for a lower value of KAIOON
(1500000):
12:18:23 Assert Failed: initializing KAIO failed
12:18:23 IBM Informix Dynamic Server Version 12.10.FC7
12:18:23 Who: Session(1, login@host, 0, (nil))
Thread(113, kaio, 0, 1)
File: kaioapi.c Line: 298
12:18:23 Results: io_queue_init(1500000) failed returning
-22, errno = 0
12:18:23 stack trace for pid 22650 written to
/tmp/af.459e06e
12:18:23 See Also: /tmp/af.459e06e
12:18:25 initializing KAIO failed
12:18:25 io_queue_init(1500000) failed returning -22, errno
= 0
12:18:25 Assert Failed: kaiothread() ERROR
For both cases the stack of the asserting thread is:
12:18:23 Stack for thread: 113 kaio
base: 0x000000004827f000
len: 69632
pc: 0x00000000013cf857
tos: 0x000000004828f090
state: running
vp: 1
0x00000000013cf857 (oninit) afstack
0x00000000013d29ee (oninit) afhandler
0x00000000013d2e62 (oninit) affail_interface
0x0000000001427e21 (oninit) _aioinit
0x00000000013c1460 (oninit) kaiothread
0x0000000001428327 (oninit) startup | |
| Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC14 and 14.10.xC4. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Update to Informix Server 12.10.xC14 or 14.10.xC4. * **************************************************************** | |
| Local Fix: | |
| Solution | |
| Workaround | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC14 and 14.10.xC4. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Update to Informix Server 12.10.xC14 or 14.10.xC4. * **************************************************************** | |
| Comment | |
Fixed in Informix Server 12.10.xC14 and 14.10.xC4. | |
| Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 18.11.2019 08.06.2020 08.06.2020 |
| Problem solved at the following versions (IBM BugInfos) | |
12.10.xC14 | |
| Problem solved according to the fixlist(s) of the following version(s) | |
