MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/01/02 through 06/07/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 32 75 107
Davis 81 0 81
Irvine 36 0 36
Los Angeles 1 29 30
Riverside 4 9 13
San Diego 22 14 36
San Francisco 13 0 13
Santa Barbara 5 10 15
Santa Cruz 0 11 11
LBL 0 8 8
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 1 8 9
Stanford 4
Other-Network UC n/a 35 35
_______ ______ _____
195 201 400
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 4 13 35
2-4 a.m. 1 13 75
4-6 a.m. 0 0 0
6-8 a.m. 2 11 109
8-10 a.m. 39 116 1,512
10-12 a.m. 90 234 2,944
12-2 p.m. 66 168 908
2-4 p.m. 76 203 3,911
4-6 p.m. 48 100 2,136
6-8 p.m. 31 61 411
8-10 p.m. 23 116 827
10-12 p.m. 20 61 1,451
__________ __________ __________ _________________
Total: 400 1,096 14,319
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 76 276 352
Davis 216 0 216
Irvine 60 0 60
Los Angeles 9 83 92
Riverside 8 14 22
San Diego 34 34 68
San Francisco 53 0 53
Santa Barbara 5 32 37
Santa Cruz 0 22 22
LBL 0 11 11
LLL 0 4 4
Los Alamos n/a 0 0
Other - UC 2 17 19
Stanford 21
Other-Network UC n/a 119 119
_______ ______ _____
463 612 1,096
Number of FIND commands by database
MAGS database 932
NEWS database 106
COMP database 58
Total number of FIND commands 1,096
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 900 2,533 3,433
Davis 2,020 0 2,020
Irvine 1,063 0 1,063
Los Angeles 65 3,129 3,194
Riverside 23 245 268
San Diego 634 480 1,114
San Francisco 372 0 372
Santa Barbara 54 159 213
Santa Cruz 0 189 189
LBL 0 107 107
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 3 254 257
Stanford 77
Other-Network UC n/a 1,486 1,486
_______ ______ _____
5,134 8,582 13,793
Number of Records Displayed by database:
MAGS database 12,779
NEWS database 853
COMP database 687
Total number of Records Displayed 13,793
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 89.0%
Percent of NEWS sessions 8.5%
Percent of COMP sessions 2.5%
Percent of searches done in the MAGS database 85.0%
Percent of searches done in the NEWS database 9.7%
Percent of searches done in the COMP database 5.3%
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 6.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 6.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:15
Average session length (minutes:seconds) 15:34
Longest session recorded (minutes:seconds) 286:05
Average number of searches completed per session 2.6
Retrievals per search - median 4.0
Retrievals per search - average 432.2
Retrievals per search - standard deviation 2579.0
Percent of searches completed with 0 results 29.4%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 66.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 879 26.7%
DISPLAY (excluding automatic displays) 1,357 41.2%
HELP 72 2.2%
EXPLAIN 69 2.1%
SET/RESET 159 4.8%
SHOW 19 0.6%
ADD ON (AND, OR, AND NOT) 53 1.6%
LOGON or LOGOFF 435 13.2%
COMMENT 0 0.0%
SAVE 72 2.2%
USE 0 0.0%
OTHER 177 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 183 20.0% 44 24.0% 7 65.1 284.9
TITLE WORD 253 27.6% 89 35.2% 8 395.7 2163.1
EXACT TITLE 14 1.5% 8 57.1% 4 33.0 68.3
JOURNAL 56 6.1% 31 55.4% 718 5498.0 12013.0
EXACT JOURNAL 47 5.1% 20 42.6% 1,610 4103.6 4566.4
SUBJECT 151 16.5% 47 31.1% 25 158.7 519.9
EXACT SUBJECT 8 0.9% 2 25.0% 6 30.8 60.6
KEYWORD 128 14.0% 21 16.4% 30 511.9 1504.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.4% 0 0.0% 3 5948.5 11892.3
DATE 24 2.6% 8 33.3% 134 407.4 537.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 29 3.2% 3 10.3% 6 42.8 117.0
EXACT PE 11 1.2% 0 0.0% 2 116.5 310.4
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 8 0.9% 0 0.0% 262 2644.6 4950.7
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 41 4.7% 12 29.3% 154 1786.6 5027.8
Single 831 95.3% 249 30.0% 14 590.7 3023.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 62.9%
LONG 2.1%
FIELDS 0.3%
PERIODICALS 2.7%
COMMENTS 0.0%
Other 28.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 12:51
Average session length (minutes:seconds) 16:35
Longest session recorded (minutes:seconds) 41:30
Average number of searches completed per session 5.8
Retrievals per search - median 5.0
Retrievals per search - average 126.4
Retrievals per search - standard deviation 305.5
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 55 38.7%
DISPLAY (excluding automatic displays) 51 35.9%
HELP 3 2.1%
EXPLAIN 2 1.4%
SET/RESET 4 2.8%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 3 2.1%
LOGON or LOGOFF 15 10.6%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 9 6.3%
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 5 9.1% 2 40.0% 7 19.7 24.6
TITLE WORD 6 10.9% 1 16.7% 10 14.0 11.4
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 12 21.8% 5 41.7% 7 158.4 216.1
EXACT SUBJECT 1 1.8% 1 100% 0 0.0 0.0
KEYWORD 14 25.5% 2 14.3% 272 465.8 529.9
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 10 18.2% 0 0.0% 3 4.6 5.5
EXACT PE 7 12.7% 0 0.0% 3 45.4 108.0
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 0 0.0% 0 0.0% 0 0.0 0.0
Single 55 100% 11 20.0% 7 163.4 343.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 40.2%
LONG 0.0%
FIELDS 0.0%
PERIODICALS 18.7%
COMMENTS 0.0%
Other 41.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 269
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 1
displays or when any of these paging options is set.
TEXT included with MAIL commands 47
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 10:30
Average session length (minutes:seconds) 10:28
Longest session recorded (minutes:seconds) 40:04
Average number of searches completed per session 3.1
Retrievals per search - median 4.0
Retrievals per search - average 181.5
Retrievals per search - standard deviation 741.3
Percent of searches completed with 0 results 24.5%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 104 41.9%
DISPLAY (excluding automatic displays) 74 29.8%
HELP 2 0.8%
EXPLAIN 3 1.2%
SET/RESET 17 6.9%
SHOW 2 0.8%
ADD ON (AND, OR, AND NOT) 2 0.8%
LOGON or LOGOFF 36 14.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 8 3.2%
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 13 11.9% 4 30.8% 2 137.0 395.3
TITLE WORD 14 12.8% 1 7.1% 6 35.9 62.8
EXACT TITLE 3 2.8% 2 66.7% 1 1.0 0.0
JOURNAL 2 1.8% 2 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 27 24.8% 7 25.9% 55 836.8 1550.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 24 22.0% 8 33.3% 5 16.9 30.2
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 18 16.5% 0 0.0% 11 27.8 37.7
EXACT PE 8 7.3% 1 12.5% 3 7.9 10.1
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 5 4.8% 0 0.0% 2 5.4 5.9
Single 99 95.2% 25 25.3% 8 259.6 877.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 30.4%
LONG 0.6%
FIELDS 0.6%
PERIODICALS 19.9%
COMMENTS 0.0%
Other 46.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.5%
Ten most frequent errors:
1. First word of command is invalid 32.5%
2. NS command - no next screen 28.3%
3. FIND command with invalid index name 13.3%
4. Valid command at an inappropriate time 5.6%
5. PS command - no previous screen 5.6%
6. Search term missing from search command 2.5%
7. DISPLAY command contains invalid word 2.3%
8. DISPLAY command-record numbers too large 1.2%
9. 1243 0.8%
10. DISPLAY command - no FIND results 0.6%
11. All others 7.1%
Ten most frequent EXPLAIN requests:
1. GUIDE 20.3%
2. FIND 20.3%
3. LOCATE (ARTICLE DBS) 17.6%
4. A044 8.1%
5. MAGS DATABASE 6.8%
6. DATES 5.4%
7. COMMANDS 4.1%
8. A028 2.7%
9. MAIL 2.7%
10. NEWS DATABASE 1.4%
11. All others 10.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.2%
2. First word of command is invalid 15.9%
3. FIND command with invalid index name 8.6%
4. NS command - no next screen 6.0%
5. FIND command with zero results 6.0%
6. FIND command retrieves >1 book 6.0%
7. DISPLAY command - middle of >1 screen 6.0%
8. Valid command at an inappropriate time 4.0%
9. DISPLAY command - last of >1 screen 4.0%
10. FIND command retrieves 1 book 3.3%
11. All others 17.2%
Ten most frequent SHOW requests:
1. HISTORY 28.6%
2. IAC NEWS 23.8%
3. SYSTEM NEWS 14.3%
4. SEARCH 14.3%
5. SETTINGS (IAC DBS) 9.5%
6. SYSTEM1 NEWS 4.8%
7. MAIL STATUS 4.8%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)