2015-03-24

Additional charts

Host zm08.stanford.edu: Total CPU

avg(user) = 4.70    avg(sys) = 0.63    avg(idle) = 92.32    avg(iowait) = 2.27    avg(nice) = 0.00    avg(irq) = 0.00    avg(softirq) = 0.06

Host zm08.stanford.edu: Individual CPU user time

avg(cpu0) = 13.42    avg(cpu1) = 12.72    avg(cpu2) = 7.25    avg(cpu3) = 6.57    avg(cpu4) = 4.22    avg(cpu5) = 5.51    avg(cpu6) = 3.08    avg(cpu7) = 2.53    avg(cpu8) = 2.31    avg(cpu9) = 1.81    avg(cpu10) = 1.91    avg(cpu11) = 1.40    avg(cpu12) = 7.82    avg(cpu13) = 5.75    avg(cpu14) = 5.60    avg(cpu15) = 5.03    avg(cpu16) = 10.89    avg(cpu17) = 5.30    avg(cpu18) = 3.90    avg(cpu19) = 1.65    avg(cpu20) = 1.17    avg(cpu21) = 1.16    avg(cpu22) = 0.97    avg(cpu23) = 0.92

Host zm08.stanford.edu: Individual CPU nice time

avg(cpu0) = 0.00    avg(cpu1) = 0.00    avg(cpu2) = 0.00    avg(cpu3) = 0.00    avg(cpu4) = 0.00    avg(cpu5) = 0.00    avg(cpu6) = 0.00    avg(cpu7) = 0.00    avg(cpu8) = 0.00    avg(cpu9) = 0.00    avg(cpu10) = 0.00    avg(cpu11) = 0.00    avg(cpu12) = 0.00    avg(cpu13) = 0.00    avg(cpu14) = 0.00    avg(cpu15) = 0.00    avg(cpu16) = 0.00    avg(cpu17) = 0.00    avg(cpu18) = 0.00    avg(cpu19) = 0.00    avg(cpu20) = 0.00    avg(cpu21) = 0.00    avg(cpu22) = 0.00    avg(cpu23) = 0.00

Host zm08.stanford.edu: Individual CPU sys time

avg(cpu0) = 1.41    avg(cpu1) = 1.37    avg(cpu2) = 0.90    avg(cpu3) = 0.86    avg(cpu4) = 0.61    avg(cpu5) = 0.76    avg(cpu6) = 0.48    avg(cpu7) = 0.42    avg(cpu8) = 0.33    avg(cpu9) = 0.33    avg(cpu10) = 0.26    avg(cpu11) = 0.25    avg(cpu12) = 0.90    avg(cpu13) = 0.75    avg(cpu14) = 0.98    avg(cpu15) = 1.03    avg(cpu16) = 0.74    avg(cpu17) = 0.87    avg(cpu18) = 0.54    avg(cpu19) = 0.35    avg(cpu20) = 0.27    avg(cpu21) = 0.27    avg(cpu22) = 0.19    avg(cpu23) = 0.24

Host zm08.stanford.edu: Individual CPU idle time

avg(cpu0) = 63.89    avg(cpu1) = 63.61    avg(cpu2) = 90.98    avg(cpu3) = 91.71    avg(cpu4) = 94.77    avg(cpu5) = 92.87    avg(cpu6) = 96.22    avg(cpu7) = 96.81    avg(cpu8) = 97.26    avg(cpu9) = 97.77    avg(cpu10) = 97.76    avg(cpu11) = 98.28    avg(cpu12) = 87.58    avg(cpu13) = 89.89    avg(cpu14) = 93.11    avg(cpu15) = 93.54    avg(cpu16) = 88.10    avg(cpu17) = 93.51    avg(cpu18) = 95.24    avg(cpu19) = 97.93    avg(cpu20) = 98.52    avg(cpu21) = 98.53    avg(cpu22) = 98.80    avg(cpu23) = 98.74

Host zm08.stanford.edu: Individual CPU iowait time

avg(cpu0) = 21.02    avg(cpu1) = 22.04    avg(cpu2) = 0.76    avg(cpu3) = 0.76    avg(cpu4) = 0.33    avg(cpu5) = 0.73    avg(cpu6) = 0.16    avg(cpu7) = 0.20    avg(cpu8) = 0.06    avg(cpu9) = 0.07    avg(cpu10) = 0.04    avg(cpu11) = 0.05    avg(cpu12) = 3.56    avg(cpu13) = 3.57    avg(cpu14) = 0.22    avg(cpu15) = 0.30    avg(cpu16) = 0.16    avg(cpu17) = 0.22    avg(cpu18) = 0.24    avg(cpu19) = 0.06    avg(cpu20) = 0.02    avg(cpu21) = 0.02    avg(cpu22) = 0.01    avg(cpu23) = 0.08

Host zm08.stanford.edu: Individual CPU irq time

avg(cpu0) = 0.00    avg(cpu1) = 0.00    avg(cpu2) = 0.00    avg(cpu3) = 0.00    avg(cpu4) = 0.00    avg(cpu5) = 0.00    avg(cpu6) = 0.00    avg(cpu7) = 0.00    avg(cpu8) = 0.00    avg(cpu9) = 0.00    avg(cpu10) = 0.00    avg(cpu11) = 0.00    avg(cpu12) = 0.00    avg(cpu13) = 0.00    avg(cpu14) = 0.00    avg(cpu15) = 0.00    avg(cpu16) = 0.00    avg(cpu17) = 0.00    avg(cpu18) = 0.00    avg(cpu19) = 0.00    avg(cpu20) = 0.00    avg(cpu21) = 0.00    avg(cpu22) = 0.00    avg(cpu23) = 0.00

Host zm08.stanford.edu: Individual CPU softirq time

avg(cpu0) = 0.25    avg(cpu1) = 0.24    avg(cpu2) = 0.10    avg(cpu3) = 0.09    avg(cpu4) = 0.06    avg(cpu5) = 0.11    avg(cpu6) = 0.04    avg(cpu7) = 0.03    avg(cpu8) = 0.02    avg(cpu9) = 0.02    avg(cpu10) = 0.01    avg(cpu11) = 0.01    avg(cpu12) = 0.12    avg(cpu13) = 0.03    avg(cpu14) = 0.09    avg(cpu15) = 0.09    avg(cpu16) = 0.10    avg(cpu17) = 0.08    avg(cpu18) = 0.08    avg(cpu19) = 0.00    avg(cpu20) = 0.00    avg(cpu21) = 0.00    avg(cpu22) = 0.00    avg(cpu23) = 0.01

Host zm08.stanford.edu: Process CPU

avg(mailbox) = 3.59    avg(mysql) = 0.65    avg(stats) = 0.00

Host zm08.stanford.edu: Process Total Memory

avg(mailbox) = 21271.68    avg(mysql) = 18139.00    avg(stats) = 0.00

Host zm08.stanford.edu: Process Resident Memory

avg(mailbox) = 8869.41    avg(mysql) = 17895.81    avg(stats) = 0.00

Host zm08.stanford.edu: Virtual Memory

avg(swapped) = 6.13    avg(free) = 1167.45    avg(active) = 39435.84    avg(inactive) = 21854.95    avg(page cache) = 31202.85

Host zm08.stanford.edu: Context Switches

avg(context switches) = 9314.95

Host zm08.stanford.edu: Run/Blocked Process Queue Size, Load Average

avg(processes waiting for run time) = 1.93    avg(processes waiting for io time) = 0.75    avg(load average (1 min)) = 1.94

Host zm08.stanford.edu: Disk Utilization (Top 10 avg)

avg(sdf) = 15.68    avg(dm-0) = 5.83    avg(sdg) = 11.03    avg(dm-1) = 14.56    avg(sdl) = 15.71    avg(sdh) = 7.99    avg(dm-4) = 25.67    avg(dm-3) = 11.75    avg(sdm) = 11.05    avg(sdn) = 7.99

Host zm08.stanford.edu: Disk Throughput: /dev/sde

avg(sde read) = 0.19    avg(sde write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdf

avg(sdf read) = 615.10    avg(sdf write) = 1035.34

Host zm08.stanford.edu: Disk Throughput: /dev/sda

avg(sda read) = 0.19    avg(sda write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdk

avg(sdk read) = 17.83    avg(sdk write) = 35.05

Host zm08.stanford.edu: Disk Throughput: /dev/sdt

avg(sdt read) = 0.19    avg(sdt write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdq

avg(sdq read) = 0.19    avg(sdq write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdj

avg(sdj read) = 0.35    avg(sdj write) = 191.11

Host zm08.stanford.edu: Disk Throughput: /dev/dm-0

avg(dm-0 read) = 749.58    avg(dm-0 write) = 1194.62

Host zm08.stanford.edu: Disk Throughput: /dev/sdg

avg(sdg read) = 604.65    avg(sdg write) = 239.57

Host zm08.stanford.edu: Disk Throughput: /dev/dm-1

avg(dm-1 read) = 1208.42    avg(dm-1 write) = 478.12

Host zm08.stanford.edu: Disk Throughput: /dev/dm-2

avg(dm-2 read) = 0.30    avg(dm-2 write) = 382.91

Host zm08.stanford.edu: Disk Throughput: /dev/sdl

avg(sdl read) = 615.30    avg(sdl write) = 1036.80

Host zm08.stanford.edu: Disk Throughput: /dev/sdc

avg(sdc read) = 0.19    avg(sdc write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdr

avg(sdr read) = 0.19    avg(sdr write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sds

avg(sds read) = 0.19    avg(sds write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdi

avg(sdi read) = 375.11    avg(sdi write) = 598.17

Host zm08.stanford.edu: Disk Throughput: /dev/sdh

avg(sdh read) = 549.94    avg(sdh write) = 0.26

Host zm08.stanford.edu: Disk Throughput: /dev/dm-4

avg(dm-4 read) = 1230.00    avg(dm-4 write) = 2072.15

Host zm08.stanford.edu: Disk Throughput: /dev/sdb

avg(sdb read) = 0.19    avg(sdb write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/dm-3

avg(dm-3 read) = 1099.58    avg(dm-3 write) = 0.50

Host zm08.stanford.edu: Disk Throughput: /dev/sdm

avg(sdm read) = 604.17    avg(sdm write) = 238.55

Host zm08.stanford.edu: Disk Throughput: /dev/sdp

avg(sdp read) = 0.35    avg(sdp write) = 191.80

Host zm08.stanford.edu: Disk Throughput: /dev/sdn

avg(sdn read) = 550.03    avg(sdn write) = 0.24

Host zm08.stanford.edu: Disk Throughput: /dev/sdu

avg(sdu read) = 0.19    avg(sdu write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdd

avg(sdd read) = 0.19    avg(sdd write) = 0.00

Host zm08.stanford.edu: Disk Throughput: /dev/sdo

avg(sdo read) = 374.86    avg(sdo write) = 596.46

Host zm08.stanford.edu: Disk IOPs: /dev/sde

avg(sde read) = 0.05    avg(sde write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdf

avg(sdf read) = 41.45    avg(sdf write) = 37.58

Host zm08.stanford.edu: Disk IOPs: /dev/sda

avg(sda read) = 0.05    avg(sda write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdk

avg(sdk read) = 0.53    avg(sdk write) = 1.62

Host zm08.stanford.edu: Disk IOPs: /dev/sdt

avg(sdt read) = 0.05    avg(sdt write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdq

avg(sdq read) = 0.05    avg(sdq write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdj

avg(sdj read) = 0.09    avg(sdj write) = 0.84

Host zm08.stanford.edu: Disk IOPs: /dev/dm-0

avg(dm-0 read) = 12.54    avg(dm-0 write) = 66.62

Host zm08.stanford.edu: Disk IOPs: /dev/sdg

avg(sdg read) = 36.87    avg(sdg write) = 13.28

Host zm08.stanford.edu: Disk IOPs: /dev/dm-1

avg(dm-1 read) = 73.64    avg(dm-1 write) = 26.56

Host zm08.stanford.edu: Disk IOPs: /dev/dm-2

avg(dm-2 read) = 0.08    avg(dm-2 write) = 1.69

Host zm08.stanford.edu: Disk IOPs: /dev/sdl

avg(sdl read) = 41.45    avg(sdl write) = 37.57

Host zm08.stanford.edu: Disk IOPs: /dev/sdc

avg(sdc read) = 0.05    avg(sdc write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdr

avg(sdr read) = 0.05    avg(sdr write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sds

avg(sds read) = 0.05    avg(sds write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdi

avg(sdi read) = 6.32    avg(sdi write) = 33.31

Host zm08.stanford.edu: Disk IOPs: /dev/sdh

avg(sdh read) = 13.18    avg(sdh write) = 0.03

Host zm08.stanford.edu: Disk IOPs: /dev/dm-4

avg(dm-4 read) = 82.80    avg(dm-4 write) = 75.15

Host zm08.stanford.edu: Disk IOPs: /dev/sdb

avg(sdb read) = 0.05    avg(sdb write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/dm-3

avg(dm-3 read) = 26.26    avg(dm-3 write) = 0.05

Host zm08.stanford.edu: Disk IOPs: /dev/sdm

avg(sdm read) = 36.87    avg(sdm write) = 13.28

Host zm08.stanford.edu: Disk IOPs: /dev/sdp

avg(sdp read) = 0.09    avg(sdp write) = 0.84

Host zm08.stanford.edu: Disk IOPs: /dev/sdn

avg(sdn read) = 13.18    avg(sdn write) = 0.03

Host zm08.stanford.edu: Disk IOPs: /dev/sdu

avg(sdu read) = 0.05    avg(sdu write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdd

avg(sdd read) = 0.05    avg(sdd write) = 0.00

Host zm08.stanford.edu: Disk IOPs: /dev/sdo

avg(sdo read) = 6.32    avg(sdo write) = 33.31

Host zm08.stanford.edu: Disk Usage

avg(/opt/zimbra/redo-mysql) = 36.46    avg(/usr/vice/cache) = 13.83    avg(/opt/zimbra/store) = 79.90    avg(/opt/zimbra) = 69.01    avg(/opt/zimbra/hsm1) = 89.00    avg(/) = 8.01    avg(/opt/zimbra/redolog) = 22.49

Host zm08.stanford.edu: Open file descriptor count

avg(total system file descriptors open) = 7390.33    avg(mailboxd file descriptors open) = 3989.61

Host zm08.stanford.edu: Process CPU Time (Top 10 avg)

avg(updatedb) = 24.70    avg(java) = 2226.24    avg(gzip) = 2504.26    avg(mysqld) = 469.12    avg(perl) = 40.38    avg(httpd) = 34.40    avg(mysqldump) = 159.02    avg(zmmailboxd) = 2588.66    avg(horsewatcher-fe) = 48.08    avg(zmcompresslogs) = 1336.00

Host zm08.stanford.edu: SOAP: Invocation Count: Summary (Top 10 max)

max(GetContactsRequest) = 1240.00    max(MsgActionRequest.delete) = 707.00    max(NoOpRequest) = 369.00    max(MsgActionRequest.update) = 183.00    max(WaitSetRequest) = 260.00    max(AddMsgRequest) = 268.00    max(GetFolderRequest) = 487.00    max(SyncRequest) = 539.00    max(GetEffectiveFolderPermsRequest) = 159.00    max(GetAppointmentRequest) = 1972.00

Host zm08.stanford.edu: SOAP: Average Call Duration: Summary (Top 10 avg)

avg(SendMsgRequest) = 306.69    avg(DeleteAccountRequest) = 16634.67    avg(BackupQueryRequest) = 433.80    avg(GetAggregateQuotaUsageOnServerRequest) = 1706.00    avg(WaitSetRequest) = 422.73    avg(SendInviteReplyRequest) = 343.09    avg(ModifyPrefsRequest) = 591.17    avg(FolderActionRequest.empty) = 516.55    avg(SendShareNotificationRequest) = 405.20    avg(GetQuotaUsageRequest) = 2274.00

Host zm08.stanford.edu: MySQL: InnoDB Buffer Pool Pages

avg(pages read) = 45693720.86    avg(pages written) = 16827377.45

Host zm08.stanford.edu: MySQL: InnoDB Buffer Pool Hit Rate

avg(buffer pool hit rate) = 999.41

Host zm08.stanford.edu: MySQL: Database Connections In Use

avg(connections in use) = 0.51

Host zm08.stanford.edu: MySQL: Tables Open/Opened

avg(open_tables) = 1188.38    avg(opened_tables (cumulative)) = 49535.22

Host zm08.stanford.edu: MySQL: Total Slow Queries Count

avg(slow queries (cumulative)) = 62542.94

Host zm08.stanford.edu: Mailboxd: Connection Pool Get Latency

avg(mysql) = 0.17    avg(ldap) = 0.13

Host zm08.stanford.edu: Mailboxd: Lucene IO

avg(Index writes) = 144.21    avg(Index reads) = 346.07

Host zm08.stanford.edu: Mailboxd: LMTP Delivery Throughput

avg(received) = 130.42    avg(delivered) = 167.46

Host zm08.stanford.edu: Mailboxd: LMTP Delivery Rate

avg(received msgs) = 1.13    avg(delivered msgs) = 1.37    avg(received x rcpts) = 1.37

Host zm08.stanford.edu: Mailboxd: Mailbox Add Rate (Delivery Rate)

avg(mailbox add rate) = 2.43

Host zm08.stanford.edu: Mailboxd: Mailbox Add Latency (Delivery Speed)

avg(mailbox add latency) = 52.02

Host zm08.stanford.edu: Mailboxd: Request Rate by Client Protocol

avg(SOAP) = 17.50    avg(IMAP) = 82.71    avg(POP) = 3.90

Host zm08.stanford.edu: Mailboxd: Response Time by Client Protocol

avg(SOAP) = 251.91    avg(IMAP) = 17.70    avg(POP) = 84.59

Host zm08.stanford.edu: Mailboxd: Active Connections by Client Protocol

avg(IMAP) = 169.13    avg(IMAP SSL) = 672.06    avg(POP) = 0.17    avg(POP SSL) = 1.91    avg(SOAP sessions) = 843.92

Host zm08.stanford.edu: Mailboxd: Mailbox Get Count

avg(mailbox get count) = 6318.96

Host zm08.stanford.edu: Mailboxd: Mailbox Get Latency

avg(mailbox get latency) = 0.01

Host zm08.stanford.edu: Mailboxd: Mailbox Cache Hit Rate

avg(mailbox cache hit rate) = 99.96

Host zm08.stanford.edu: Mailboxd: Mailbox Item/Blob Cache Hit Rate

avg(msg blob cache) = 38.64    avg(item metadata cache) = 33.45

Host zm08.stanford.edu: Mailboxd: Minor Garbage Collection Time

avg(minor GC time) = 0.38

Host zm08.stanford.edu: Mailboxd: Major Garbage Collection Time

avg(major GC time) = 0.03

Host zm08.stanford.edu: Mailboxd: Minor Garbage Collection Count

avg(minor GC count) = 3.73

Host zm08.stanford.edu: Mailboxd: Major Garbage Collection Count

avg(major GC count) = 0.02

Host zm08.stanford.edu: Mailboxd: JVM Heap Used

avg(total) = 4818.35    avg(PS Old Gen) = 0.00    avg(CMS Old Gen) = 3836.33    avg(Tenured Gen) = 0.00    avg(Train Gen) = 0.00    avg(PS Eden Space) = 0.00    avg(PS Survivor Space) = 0.00    avg(Par Eden Space) = 834.82    avg(Par Survivor Space) = 147.20    avg(Eden Space) = 0.00    avg(Survivor Space) = 0.00

Host zm08.stanford.edu: Mailboxd: JVM Heap Free

avg(total free) = 3008.97    avg(PS Old Gen free) = 0.00    avg(CMS Old Gen free) = 2184.67    avg(Tenured Gen free) = 0.00    avg(Train Gen free) = 0.00    avg(PS Eden Space free) = 0.00    avg(PS Survivor Space free) = 0.00    avg(Par Eden Space free) = 770.81    avg(Par Survivor Space free) = 53.48    avg(Eden Space free) = 0.00    avg(Survivor Space free) = 0.00

Host zm08.stanford.edu: Mailboxd: JVM Permanent Generation and Code Cache

avg(PS Perm Gen) = 0.00    avg(Perm Gen) = 0.00    avg(CMS Perm Gen) = 135.56    avg(Code Cache) = 38.66    avg(Perm Gen [shared-ro]) = 0.00    avg(Perm Gen [shared-rw]) = 0.00    avg(PS Perm Gen free) = 0.00    avg(Perm Gen free) = 0.00    avg(CMS Perm Gen free) = 97.56    avg(Code Cache free) = 8.03    avg(Perm Gen [shared-ro] free) = 0.00    avg(Perm Gen [shared-rw] free) = 0.00

Host zm08.stanford.edu: convertd: CPU time used

avg(total cputime) = 0.32    avg(user time) = 0.30    avg(system time) = 0.02

Host zm08.stanford.edu: convertd: Resident Memory

avg(convertd rss) = 184.02

Host zm08.stanford.edu: convertd: Processes and Threads

avg(processes) = 5.92    avg(threads) = 5.93

No data available for the following charts:

Host zm08.stanford.edu: Swap Activity Host zm08.stanford.edu: Disk Throughput: /dev/dm-7 Host zm08.stanford.edu: Disk Throughput: /dev/sdx Host zm08.stanford.edu: Disk Throughput: /dev/sdab Host zm08.stanford.edu: Disk Throughput: /dev/sdaa Host zm08.stanford.edu: Disk Throughput: /dev/sdad Host zm08.stanford.edu: Disk Throughput: /dev/sdag Host zm08.stanford.edu: Disk Throughput: /dev/sdaf Host zm08.stanford.edu: Disk Throughput: /dev/sdy Host zm08.stanford.edu: Disk Throughput: /dev/sdv Host zm08.stanford.edu: Disk Throughput: /dev/sdac Host zm08.stanford.edu: Disk Throughput: /dev/dm-5 Host zm08.stanford.edu: Disk Throughput: /dev/sdw Host zm08.stanford.edu: Disk Throughput: /dev/sdae Host zm08.stanford.edu: Disk Throughput: /dev/dm-6 Host zm08.stanford.edu: Disk Throughput: /dev/sdz Host zm08.stanford.edu: Disk IOPs: /dev/dm-7 Host zm08.stanford.edu: Disk IOPs: /dev/sdx Host zm08.stanford.edu: Disk IOPs: /dev/sdab Host zm08.stanford.edu: Disk IOPs: /dev/sdaa Host zm08.stanford.edu: Disk IOPs: /dev/sdad Host zm08.stanford.edu: Disk IOPs: /dev/sdag Host zm08.stanford.edu: Disk IOPs: /dev/sdaf Host zm08.stanford.edu: Disk IOPs: /dev/sdy Host zm08.stanford.edu: Disk IOPs: /dev/sdv Host zm08.stanford.edu: Disk IOPs: /dev/sdac Host zm08.stanford.edu: Disk IOPs: /dev/dm-5 Host zm08.stanford.edu: Disk IOPs: /dev/sdw Host zm08.stanford.edu: Disk IOPs: /dev/sdae Host zm08.stanford.edu: Disk IOPs: /dev/dm-6 Host zm08.stanford.edu: Disk IOPs: /dev/sdz Host zm08.stanford.edu: Mailboxd: Dirty Lucene Index Writers Host zm08.stanford.edu: Mailboxd: Lucene IndexWriterCache Hitrate Host zm08.stanford.edu: nginx: CPU time used Host zm08.stanford.edu: nginx: Resident Memory Host zm08.stanford.edu: nginx: Processes and Threads

Summary