MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/24/01 through 03/30/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 71 291 362
Davis 121 2 123
Irvine 194 0 194
Los Angeles 1 41 42
Riverside 20 16 36
San Diego 23 37 60
San Francisco 52 0 52
Santa Barbara 4 54 58
Santa Cruz 28 25 53
LBL 0 16 16
LLL 0 3 3
Los Alamos n/a 1 1
Other - UC 6 25 31
Stanford 32
Other-Network UC n/a 127 127
_______ ______ _____
520 638 1,190
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 25 78 924
2-4 a.m. 2 3 190
4-6 a.m. 11 50 304
6-8 a.m. 17 54 752
8-10 a.m. 143 436 3,952
10-12 a.m. 207 577 5,847
12-2 p.m. 220 657 6,821
2-4 p.m. 246 671 6,858
4-6 p.m. 157 453 5,164
6-8 p.m. 45 155 1,824
8-10 p.m. 65 327 1,458
10-12 p.m. 52 212 1,312
__________ __________ __________ _________________
Total: 1,190 3,673 35,406
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 196 794 990
Davis 297 3 300
Irvine 942 0 942
Los Angeles 6 112 118
Riverside 33 52 85
San Diego 47 102 149
San Francisco 103 0 103
Santa Barbara 9 134 143
Santa Cruz 79 54 133
LBL 0 24 24
LLL 0 6 6
Los Alamos n/a 0 0
Other - UC 25 58 83
Stanford 121
Other-Network UC n/a 476 476
_______ ______ _____
1,737 1,815 3,673
Number of FIND commands by database
MAGS database 3,352
NEWS database 199
COMP database 122
Total number of FIND commands 3,673
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,869 9,227 11,096
Davis 2,702 79 2,781
Irvine 4,884 0 4,884
Los Angeles 6 1,396 1,402
Riverside 132 394 526
San Diego 319 698 1,017
San Francisco 2,169 0 2,169
Santa Barbara 105 1,285 1,390
Santa Cruz 546 587 1,133
LBL 0 223 223
LLL 0 45 45
Los Alamos n/a 0 0
Other - UC 749 752 1,501
Stanford 184
Other-Network UC n/a 5,676 5,676
_______ ______ _____
13,481 20,362 34,027
Number of Records Displayed by database:
MAGS database 33,177
NEWS database 1,150
COMP database 1,079
Total number of Records Displayed 34,027
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.5%
Percent of NEWS sessions 8.2%
Percent of COMP sessions 4.4%
Percent of searches done in the MAGS database 91.3%
Percent of searches done in the NEWS database 5.4%
Percent of searches done in the COMP database 3.3%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 1.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 9:25
Average session length (minutes:seconds) 13:50
Longest session recorded (minutes:seconds) 162:33
Average number of searches completed per session 3.2
Retrievals per search - median 4.0
Retrievals per search - average 360.7
Retrievals per search - standard deviation 4381.6
Percent of searches completed with 0 results 29.9%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 47.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,100 31.3%
DISPLAY (excluding automatic displays) 3,846 38.8%
HELP 137 1.4%
EXPLAIN 122 1.2%
SET/RESET 474 4.8%
SHOW 21 0.2%
ADD ON (AND, OR, AND NOT) 252 2.5%
LOGON or LOGOFF 1,239 12.5%
COMMENT 0 0.0%
SAVE 190 1.9%
USE 7 0.1%
OTHER 526 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 1,014 31.6% 247 24.4% 9 48.3 152.9
TITLE WORD 926 28.9% 356 38.4% 6 728.7 4351.1
EXACT TITLE 48 1.5% 31 64.6% 2 7.8 13.8
JOURNAL 98 3.1% 45 45.9% 1,086 4119.5 14230.8
EXACT JOURNAL 52 1.6% 18 34.6% 536 1124.1 1406.6
SUBJECT 471 14.7% 154 32.7% 19 311.7 1054.8
EXACT SUBJECT 17 0.5% 3 17.6% 71 775.4 2065.4
KEYWORD 429 13.4% 83 19.3% 31 1028.7 10853.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 14 0.4% 4 28.6% 20 32.3 29.4
DATE 43 1.3% 6 14.0% 10 222.6 931.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 48 1.5% 10 20.8% 10 98.8 256.5
EXACT PE 26 0.8% 8 30.8% 4 9.8 17.7
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 19 0.6% 0 0.0% 1,275 1635.4 2042.2
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 131 4.3% 34 26.0% 14 360.3 1093.8
Single 2,940 95.7% 897 30.5% 11 561.8 5569.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 59.6%
LONG 2.3%
FIELDS 1.3%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 32.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:43
Average session length (minutes:seconds) 7:41
Longest session recorded (minutes:seconds) 25:59
Average number of searches completed per session 2.3
Retrievals per search - median 3.0
Retrievals per search - average 1098.4
Retrievals per search - standard deviation 7219.1
Percent of searches completed with 0 results 36.9%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 117 28.2%
DISPLAY (excluding automatic displays) 143 34.5%
HELP 19 4.6%
EXPLAIN 14 3.4%
SET/RESET 26 6.3%
SHOW 3 0.7%
ADD ON (AND, OR, AND NOT) 5 1.2%
LOGON or LOGOFF 53 12.8%
COMMENT 0 0.0%
SAVE 12 2.9%
USE 0 0.0%
OTHER 23 5.5%
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 10 8.1% 6 60.0% 7 26.5 40.3
TITLE WORD 42 34.1% 15 35.7% 16 684.1 2886.0
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 0.8% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 17 13.8% 8 47.1% 130 131.9 133.4
EXACT SUBJECT 1 0.8% 0 0.0% 2 2.0 0.0
KEYWORD 49 39.8% 17 34.7% 22 3347.6 13695.3
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 2 1.6% 2 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.8% 0 0.0% 1 1.0 0.0
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
By number of indexes:
Multiple 5 4.3% 5 100% 0 0.0 0.0
Single 112 95.7% 38 33.9% 19 1714.7 9204.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.3%
SHORT 56.4%
LONG 1.6%
FIELDS 2.0%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 29.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 815
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 74
displays or when any of these paging options is set.
TEXT included with MAIL commands 164
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:48
Average session length (minutes:seconds) 9:01
Longest session recorded (minutes:seconds) 70:46
Average number of searches completed per session 2.0
Retrievals per search - median 1.0
Retrievals per search - average 486.9
Retrievals per search - standard deviation 2712.7
Percent of searches completed with 0 results 45.4%
Percent of searches entered that are long 3.5%
Percent of long searches completed
(includes partial results) 42.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 191 35.7%
DISPLAY (excluding automatic displays) 108 20.2%
HELP 17 3.2%
EXPLAIN 15 2.8%
SET/RESET 50 9.3%
SHOW 6 1.1%
ADD ON (AND, OR, AND NOT) 8 1.5%
LOGON or LOGOFF 111 20.7%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 29 5.4%
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 43 22.4% 28 65.1% 44 602.3 1109.3
TITLE WORD 59 30.7% 17 28.8% 15 437.9 1925.1
EXACT TITLE 8 4.2% 4 50.0% 2 3.3 3.3
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1 0.5% 0 0.0% 145 145.0 0.0
SUBJECT 39 20.3% 22 56.4% 200 457.4 909.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 41 21.4% 16 39.0% 39 2367.6 6851.6
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 1 0.5% 1 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
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 4 2.1% 1 25.0% 26 57.3 76.9
Single 184 97.9% 86 46.7% 22 961.3 3765.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
SHORT 46.8%
LONG 3.4%
FIELDS 3.4%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 43.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 9.8%
Ten most frequent errors:
1. First word of command is invalid 33.0%
2. NS command - no next screen 32.3%
3. FIND command with invalid index name 7.9%
4. DISPLAY command contains invalid word 4.6%
5. PS command - no previous screen 2.9%
6. Search term missing from search command 2.0%
7. MAIL command issued w/o email address 1.9%
8. Max. # of ports to a Z39 db are in use 1.9%
9. Valid command at an inappropriate time 1.2%
10. Add-on search, no index name after verb 0.9%
11. All others 11.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 19.9%
2. LOCATE (ARTICLE DBS) 14.6%
3. INDEXES 11.9%
4. COMMANDS 8.6%
5. FIND 7.9%
6. DISPLAYS (IAC DBS) 5.3%
7. MAGS DATABASE 2.6%
8. Unrecognized term 2.6%
9. DATABASES 2.6%
10. ADDON SEARCH 2.6%
11. All others 21.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.7%
2. First word of command is invalid 19.1%
3. FIND command with zero results 6.8%
4. FIND command with invalid index name 6.2%
5. DISPLAY command-first of >1 screen 5.2%
6. DISPLAY command-complete in one screen 4.9%
7. FIND command retrieves >1 book 4.6%
8. DISPLAY command - middle of >1 screen 4.6%
9. PS command - no previous screen 2.2%
10. DISPLAY command - last of >1 screen 2.2%
11. All others 19.4%
Ten most frequent SHOW requests:
1. HISTORY 59.3%
2. SEARCH 22.2%
3. SYSTEM NEWS 7.4%
4. LIBRARY NEWS 3.7%
5. DATES 3.7%
6. PAGING 3.7%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)