MELVYL IAC DATABASES TELNET STATISTICS
Time period: 11/03/01 through 11/09/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 135 318 453
Davis 154 0 154
Irvine 59 0 59
Los Angeles 0 67 67
Riverside 13 18 31
San Diego 10 29 39
San Francisco 30 0 30
Santa Barbara 16 9 25
Santa Cruz 22 7 29
LBL 0 15 15
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 3 36 39
Stanford 3
Other-Network UC n/a 88 88
_______ ______ _____
442 588 1,033
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 19 67 876
2-4 a.m. 2 1 15
4-6 a.m. 3 5 101
6-8 a.m. 21 35 457
8-10 a.m. 80 176 1,422
10-12 a.m. 153 483 4,357
12-2 p.m. 236 589 7,214
2-4 p.m. 213 512 6,416
4-6 p.m. 136 370 3,854
6-8 p.m. 71 174 2,066
8-10 p.m. 65 195 2,705
10-12 p.m. 34 87 886
__________ __________ __________ _________________
Total: 1,033 2,694 30,369
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 374 731 1,105
Davis 350 0 350
Irvine 197 0 197
Los Angeles 0 154 154
Riverside 41 92 133
San Diego 44 62 106
San Francisco 92 0 92
Santa Barbara 72 16 88
Santa Cruz 37 22 59
LBL 0 44 44
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 10 103 113
Stanford 16
Other-Network UC n/a 234 234
_______ ______ _____
1,217 1,461 2,694
Number of FIND commands by database
MAGS database 2,417
NEWS database 193
COMP database 84
Total number of FIND commands 2,694
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 5,746 9,693 15,439
Davis 2,863 0 2,863
Irvine 1,217 0 1,217
Los Angeles 0 1,943 1,943
Riverside 146 508 654
San Diego 537 689 1,226
San Francisco 909 0 909
Santa Barbara 250 68 318
Santa Cruz 595 211 806
LBL 0 466 466
LLL 0 8 8
Los Alamos n/a 0 0
Other - UC 134 1,135 1,269
Stanford 23
Other-Network UC n/a 3,074 3,074
_______ ______ _____
12,397 17,795 30,215
Number of Records Displayed by database:
MAGS database 27,585
NEWS database 2,086
COMP database 698
Total number of Records Displayed 30,215
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.3%
Percent of NEWS sessions 9.0%
Percent of COMP sessions 4.6%
Percent of searches done in the MAGS database 89.7%
Percent of searches done in the NEWS database 7.2%
Percent of searches done in the COMP database 3.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:54
Average session length (minutes:seconds) 12:11
Longest session recorded (minutes:seconds) 501:07
Average number of searches completed per session 2.7
Retrievals per search - median 6.0
Retrievals per search - average 798.8
Retrievals per search - standard deviation 8225.6
Percent of searches completed with 0 results 29.3%
Percent of searches entered that are long 2.0%
Percent of long searches completed
(includes partial results) 64.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,246 27.6%
DISPLAY (excluding automatic displays) 3,055 37.5%
HELP 309 3.8%
EXPLAIN 236 2.9%
SET/RESET 311 3.8%
SHOW 36 0.4%
ADD ON (AND, OR, AND NOT) 171 2.1%
LOGON or LOGOFF 1,223 15.0%
COMMENT 0 0.0%
SAVE 128 1.6%
USE 1 0.0%
OTHER 429 5.3%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 445 19.0% 110 24.7% 10 82.5 300.0
TITLE WORD 485 20.8% 130 26.8% 13 298.4 1766.3
EXACT TITLE 60 2.6% 32 53.3% 43 99.6 229.7
JOURNAL 118 5.1% 39 33.1% 869 8294.8 31850.4
EXACT JOURNAL 40 1.7% 21 52.5% 1,481 3170.7 5165.4
SUBJECT 583 25.0% 233 40.0% 35 322.2 901.3
EXACT SUBJECT 16 0.7% 8 50.0% 47 284.5 525.8
KEYWORD 453 19.4% 82 18.1% 32 2265.8 13684.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.3% 1 16.7% 5,931 10913.2 12460.5
DATE 30 1.3% 2 6.7% 186 285.5 353.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 57 2.4% 21 36.8% 4 154.2 642.6
EXACT PE 13 0.6% 0 0.0% 8 16.4 33.4
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 30 1.3% 8 26.7% 165 767.8 1333.9
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 102 4.6% 23 22.5% 39 966.1 3900.4
Single 2,125 95.4% 640 30.1% 20 1171.4 10208.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 60.8%
LONG 2.9%
FIELDS 1.2%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 31.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:36
Average session length (minutes:seconds) 4:31
Longest session recorded (minutes:seconds) 15:14
Average number of searches completed per session 1.8
Retrievals per search - median 2.0
Retrievals per search - average 50.7
Retrievals per search - standard deviation 151.2
Percent of searches completed with 0 results 36.9%
Percent of searches entered that are long 2.4%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 79 23.4%
DISPLAY (excluding automatic displays) 131 38.9%
HELP 10 3.0%
EXPLAIN 7 2.1%
SET/RESET 21 6.2%
SHOW 2 0.6%
ADD ON (AND, OR, AND NOT) 5 1.5%
LOGON or LOGOFF 56 16.6%
COMMENT 0 0.0%
SAVE 4 1.2%
USE 0 0.0%
OTHER 22 6.5%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 23 26.7% 13 56.5% 2 9.1 17.9
TITLE WORD 16 18.6% 7 43.8% 20 136.7 276.6
EXACT TITLE 2 2.3% 2 100% 0 0.0 0.0
JOURNAL 4 4.7% 2 50.0% 38 37.5 48.8
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 5 5.8% 3 60.0% 24 24.0 31.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 29 33.7% 2 6.9% 28 100.7 200.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 2.3% 0 0.0% 14 14.0 0.0
DATE 3 3.5% 0 0.0% 14 15.0 1.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.2% 0 0.0% 2 2.0 0.0
EXACT PE 1 1.2% 0 0.0% 38 38.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 5 6.3% 0 0.0% 14 10.0 7.0
Single 74 93.7% 29 39.2% 21 92.2 198.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.9%
SHORT 63.5%
LONG 0.5%
FIELDS 1.5%
PERIODICALS 2.5%
COMMENTS 0.0%
Other 28.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 639
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 33
displays or when any of these paging options is set.
TEXT included with MAIL commands 125
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:48
Average session length (minutes:seconds) 6:27
Longest session recorded (minutes:seconds) 41:19
Average number of searches completed per session 2.1
Retrievals per search - median 2.0
Retrievals per search - average 7235.0
Retrievals per search - standard deviation 96828
Percent of searches completed with 0 results 44.0%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 183 31.1%
DISPLAY (excluding automatic displays) 134 22.8%
HELP 35 6.0%
EXPLAIN 23 3.9%
SET/RESET 37 6.3%
SHOW 7 1.2%
ADD ON (AND, OR, AND NOT) 10 1.7%
LOGON or LOGOFF 138 23.5%
COMMENT 0 0.0%
SAVE 1 0.2%
USE 0 0.0%
OTHER 20 3.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 23 11.7% 14 60.9% 372 417.2 491.3
TITLE WORD 56 28.4% 26 46.4% 22 316.4 981.9
EXACT TITLE 1 0.5% 1 100% 0 0.0 0.0
JOURNAL 3 1.5% 2 66.7% 1.34E6 1338382 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 51 25.9% 25 49.0% 19 355.5 585.4
EXACT SUBJECT 4 2.0% 4 100% 0 0.0 0.0
KEYWORD 41 20.8% 10 24.4% 178 563.7 1106.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 16 8.1% 0 0.0% 310 385.3 210.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.0% 0 0.0% 17 17.0 15.6
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 15 8.2% 3 20.0% 310 287.0 134.2
Single 167 91.8% 76 45.5% 26 15139.1 140258
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 44.1%
LONG 6.8%
FIELDS 1.9%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 43.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.1%
Ten most frequent errors:
1. First word of command is invalid 39.4%
2. NS command - no next screen 20.8%
3. FIND command with invalid index name 14.2%
4. PS command - no previous screen 4.0%
5. Valid command at an inappropriate time 3.0%
6. Search term missing from search command 2.6%
7. DISPLAY command contains invalid word 2.6%
8. DISPLAY command - no FIND results 1.6%
9. NS of SHOW/EXP command-no next screen 1.3%
10. DISPLAY command-record numbers too large 1.0%
11. All others 9.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 29.3%
2. GUIDE 24.4%
3. FIND 11.7%
4. INDEXES 6.4%
5. COMMANDS 5.3%
6. Unrecognized term 3.0%
7. MAGS DATABASE 2.6%
8. DISPLAYS (IAC DBS) 2.3%
9. ADDON SEARCH 1.5%
10. NEWS DATABASE 1.1%
11. All others 12.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.2%
2. First word of command is invalid 21.5%
3. FIND command with invalid index name 11.0%
4. DISPLAY command-complete in one screen 6.0%
5. FIND command with zero results 5.3%
6. DISPLAY command-first of >1 screen 5.3%
7. DISPLAY command - middle of >1 screen 4.0%
8. FIND command retrieves >1 book 2.6%
9. PS command - no previous screen 2.4%
10. NS command - no next screen 1.8%
11. All others 16.0%
Ten most frequent SHOW requests:
1. HISTORY 37.8%
2. SEARCH 31.1%
3. IAC NEWS 24.4%
4. SETTINGS (IAC DBS) 2.2%
5. GLOSSARY 2.2%
6. TIME 2.2%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)