Fix: Setting memory cache size greater than 2GB causes a segfault.

The problem was in the block_address() function that returns the memory address
for a given cache block, It was using 32bit integers to calculate the offset of
the block within the shared memory space that is only good until the 2GB limit.

diff --git a/src/query_cache/pool_memqcache.c b/src/query_cache/pool_memqcache.c
index 41a87f755e471fc4d24e879ee201fd390a0257f6..e8e9d28b5fa81c0e7a8859d1c05143ae63cd4dac 100644 (file)
--- a/src/query_cache/pool_memqcache.c
+++ b/src/query_cache/pool_memqcache.c
@@ -2861,7 +2861,7 @@ block_address(int blockid)
        char       *p;
 
        p = pool_memory_cache_address() +
-               blockid * pool_config->memqcache_cache_block_size;
+               (uint64)blockid * pool_config->memqcache_cache_block_size;
        return p;
 }