Hello! We are repeatedly stumbling upon a problem which apparently looks like one already discussed in 2010 (about a year ago):
http://tech.groups.yahoo.com/group/firebird-support/message/106845 Firebird log shows the messages of the type: Index 1 is corrupt (missing entries) in table <XXX> (128) The problem appears consistently, irrespective of FB version (we see this with various 2.1.x and 2.5 FB versions), irrespective of the underlying hardware (we have made tests on several machines, so we believe we can really safely exclude the possibility of RAM or disk problems). All our FB installations are running under Windows (Vista and some others). Apparently the problem shows up only when validation is being done with some specific software (for instance: IBO console, using "check record fragments") or via IBX Delphi components. I was apparently *NOT* able to produce any validation errors by using gfix with either -validate -full or -validate -full -ignore It appears that the problem shows up only with massive databases of size about 40 to 65 GB - we have two such examples. Our databases in question consist of one massive table and few very small ones. The problem appears with the primary index of the massive table. This index has six fields of type varchar, with the total length of 44 characters. There are neither Null nor blank key fields present in the table. The ODS used is the highest supported with the used FB version. Backup and restore have no problems to successfully complete (both directions work). However, the problem does not go away. The problem is obviously connected to the building of the index and not to the basic table: index may be dropped, whereupon no validation problems appear. As soon as the index is recreated, the subsequent validation reports the same problem. The table in question has many insertions and deletions in productive use, invoked only from a single connection. Following the phase of intensive insertions and deletions, comes a "select phase", consisting solely of selects, possibly but rarely from more than one concurrent connection. We actually haven't noticed any data loss or other abnormalities. However, we are not happy to see these validation results and would like to know if we can do something in some other way in order to avoid that, or if we can perhaps somehow help developers to pinpoint the issue (if this is a FB issue at all). Unfortunately, we must not provide the data itself. Thank you for any suggestions! Borut ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
