现在有几年的数据，每年有3000多个变量，想把这几年的数据合并到一起，用mer命令，结果显示“no room to add more variables Up to 5,000 variables are currently allowed, although you could reset the maximum using set
maxvar; see help memory.
”，然后根据提示设置变量最大值，提示“no; data in memory would be lost”；去设置内存，提示stata会自动设置内存：“set memory ignored.
Memory no longer needs to be set in modern Statas; memory adjustments are performed on the fly
automatically.
”
请教高人，是因为我每个数据变量太多不能合并吗，我试了下5000变量以内，可以合并数据，超过5000就不行了，请高人指点
我用的set max_memory 30000，但还是不行，上面显示segmentsize must be <= max_memory. For efficiency reasons, Stata allocates one extra segment, so 2*segmentsize
must be <= max_memory. segmentsize is currently 16m. Thus, max_memory must
be >= 32m.
这是什么意思？有解决办法吗？
求大神指教。
max_memory >= 2*segmentsize required
Stata allocates memory for storing your data in units of
segmentsize. max_memory specifies the maximum amount of memory
that Stata can use for your data. See help memory. Clearly,
segmentsize must be <= max_memory. For efficiency reasons, Stata
allocates one extra segment, so 2*segmentsize must be <=
max_memory. segmentsize is currently 32m. Thus, max_memory must
be >= 64m.
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