Thanks Noel, Andrei,
The cache is split into 16 Segments each segment tracks memory used
and Max cache size using longs.
Looking at the code the overflow would happen if the size of a page or an
Value is over 2GB, the memory used is stored as an in - or in the case of
a page
if two Values of 1GB are added to a page, you cannot split a page which has
1GB and the second value is added before checking the size which could
cause the
overflow.
I suspect someone has added very large values which has triggered this.
cheers
Mark
case PUT: {
value = decisionMaker.selectValue(result, value);
p = p.copy();
if (index < 0) {
p.insertLeaf(-index - 1, key, value);
int keyCount;
while ((keyCount = p.getKeyCount()) > store.getKeysPerPage()
|| p.getMemory() > store.getMaxPageSize()
&& keyCount > (p.isLeaf() ? 1 : 2)) {
On Sat, Oct 24, 2020 at 3:18 AM Andrei Tokar wrote:
> I guess, you next step could be to reduce configured cache size to some
> reasonable number.
> What makes you believe that you actually need such huge cache?
> If you have configured MVStore cache size to be 4Gb, how can you expect
> usedMemory field (which is java int) to always stay positive?
>
> On Friday, October 23, 2020 at 2:15:44 PM UTC-4 Noel Grandin wrote:
>
>> That looks like an integer overflow somewhere.
>>
>> I would tweak the source code in the places that modify that field, to
>> dump stack traces, and work backwards.
>>
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