memory leak on AWS ec2 a1.large

meminfo.txt

MemTotal:        3889744 kB
MemFree:           82304 kB
MemAvailable:      18652 kB
Buffers:              32 kB
Cached:             4572 kB
SwapCached:            0 kB
Active:           514320 kB
Inactive:           2472 kB
Active(anon):     512444 kB
Inactive(anon):      224 kB
Active(file):       1876 kB
Inactive(file):     2248 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:        512276 kB
Mapped:             3424 kB
Shmem:               392 kB
Slab:              87376 kB
SReclaimable:      26572 kB
SUnreclaim:        60804 kB
KernelStack:        2432 kB
PageTables:         2304 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     1944872 kB
Committed_AS:     742892 kB
VmallocTotal:   135290290112 kB
VmallocUsed:           0 kB
VmallocChunk:          0 kB
AnonHugePages:      8192 kB
ShmemHugePages:        0 kB
ShmemPmdMapped:        0 kB
CmaTotal:          65536 kB
CmaFree:           11540 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB