I don't think there is much that you can do short of doing a SCRIPT and
RUNSCRIPT cycle.
You don't perhaps create temporary tables somewhere in your app?
That's the only thing I can think of that might lead to a situation with
that many sequences.
Doing a backup to script and then grepping over that script is the
easiest way to figure out if they are legitimate or not.
I would suggest using compression to keep the script size reasonable.
Something like
SCRIPT TO temp.gz COMPRESSION GZIP
And then you can use
gunzip | grep SEQ_001
to search through it.
On 2013-09-29 20:55, JND wrote:
Hi,
Does this ring a bell for anyone...
#1. I have a database with about 100 tables. When I open the H2 Web
console (port 8082) it exhibits excessive memory consumption at
tree.js:82, to the point that the browser will consume all host memory.
#2. While investigating this, I noticed that JavaScript is rendering
the Sequences tree. Then I noticed that there are thousands upon
thousands of sequences being listed. If I SCRIPT NODATA, all of the
sequences are shown with CREATE SEQUENCES yet only 15 are associated
with table columns in the CREATE TABLE DDLs. The other thousands also
look very repetitive (most have a current value of 33 or 64).
#3. These orphaned sequences cannot be dropped (“belongs to table”). I
am running H2 1.3.173, but I guess these could be buggy sequences from
a prior version. I’ve tried to create various test cases but cannot
create more undroppable sequences in 1.3.173. I could try reproducing
it in earlier versions but I don’t know which version(s) were affected
or which test case(s) will reproduce it.
My questions are:
• How can I figure out if these sequences are “legitimate”? Currently
I assume none of them will be needed for database integrity.
• Is it possible this was caused by an H2 bug that’s fixed in .173,
and kind of SQL could trigger it?
• Assuming these sequences are bogus, what is the most efficient way
of deleting them?
I have a 20 GB production database that has about 146500 of these...
J
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