suche 36x36
  • Admin-Scout-small-Banner
           

    CURSOR Admin-Scout

    get the ultimate tool for Informix

    pfeil  
Latest versionsfixlist
14.10.xC11 FixList
12.10.xC16.X5 FixList
11.70.xC9.XB FixList
11.50.xC9.X2 FixList
11.10.xC3.W5 FixList
Have problems? - contact us.
Register for free anmeldung-x26
Contact form kontakt-x26

Informix - Problem description

Problem IT37667 Status: Closed

POTENTIAL FOR MEMORY CORRUPTION AND INSTANCE FAILURE WHEN ENABLING
STMT_CACHE_QUERY_PLAN

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
Enabling STMT_CACHE_QUERY_PLAN can result in the instance assert
failing after which the instance may become unresponsive.

The following reproduces the problem:

create table tab1
(col1 serial, col2 datetime year to second default current year
to second) lock mode row;

create unique index tab1_idx1 on tab1 (col1);
create index tab1_idx2 on tab1 (col2);
set explain on;
select max(col1) from tab1 where col2 + 500 UNITS SECOND <
CURRENT;

Reviewing the Assertion Failure file the following stack is
seen:

Stack for thread: 104 sqlexec

 base: 0x0000000047eb2000
  len:   69632
   pc: 0x00000000014c1d8d
  tos: 0x0000000047ec0290
state: running
   vp: 1

(oninit) afstack
(oninit) afhandler
(oninit) affail_interface
(oninit) mem_asfail
(oninit) mt_checkpool2
(oninit) mt_realloc
(oninit) ex_gcv_print
(oninit) opexplain
(oninit) closecb
(oninit) close_cb_subtree
(oninit) closesdb
(oninit) sq_close
(oninit) sqmain
(oninit) spawn_thread
(oninit) th_init_initgls
(oninit) startup
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC7.                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC7.                        *
****************************************************************
Local Fix:
Turn off STMT_CACHE_QUERY_PLAN
Solution
Workaround
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC7.                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC7.                        *
****************************************************************
Comment
Fixed in Informix Server 14.10.xC7.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
16.07.2021
01.11.2021
01.11.2021
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
Informix EditionsInformix Editions
Informix Editions
DocumentationDocumentation
Documentation
IBM NewsletterIBM Newsletter
IBM Newsletter
Current BugsCurrent Bugs
Current Bugs
Bug ResearchBug Research
Bug Research
Bug FixlistsBug Fixlists
Bug Fixlists
Release NotesRelease Notes
Release Notes
Machine NotesMachine Notes
Machine Notes
Release NewsRelease News
Release News
Product LifecycleProduct Lifecycle
Lifecycle
Media DownloadMedia Download
Media Download