shmop_open error

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for the table `CREATE TABLE t(f1 text, f2 text, age int, color string, age2 int);`

the load emulation like
```
manticore-load \
--host=127.0.0.1 \
--port=27315 \
--threads=20 \
--total=1000 \
--load="SELECT * FROM t WHERE MATCH('() | () | () | () ')" \
--together \
--batch-size=10000 \
--threads=5 \
--total=1000000 \
--load="INSERT INTO t(id, f1, f2, age, color, age2) VALUES(0, '', '', , '', )"
```

exits with the following error
```
Warning: shmop_open(): Unable to attach or create shared memory segment "Invalid argument" in /usr/bin/manticore-load on line 86
Failed to create shared memory segment. Error: shmop_open(): Unable to attach or create shared memory segment "Invalid argument"
```

sometimes it helps to start the load with the sudo.

Reproduce the shown manticore-load command and inspect /usr/bin/manticore-load at line 86, where shmop_open reports the shared-memory failure. Compare runs with and without sudo, then verify that the load starts without the Invalid argument error under the documented conditions.

Written by the indexing model from the issue text.